Narrow passage. Roll on Passage Contents and Exits. For passage width, roll 1d6:

2 - 7

Passage. 10 feet wide. Roll on Passage Contents and Exits.

Small room. Roll on Room and Chamber Contents and Exits. For room size, roll 1d4:

15 x 15 ft.

15 x 20 ft.

20 x 20 ft.

Large chamber. Roll on Room and Chamber Contents and Exits. For chamber size, roll 1d6:

30 x 30 ft.

30 x 40 ft.

40 x 40 ft.

40 x 50 ft.

50 x 50 ft.

1 - 10

Empty

Roll on Passage Scenery

Roll on Escalations

Roll on Obstacles

Empty

Roll on Small Room Scenery or Large Chamber Scenery

Roll on Novelties

Roll on Obstacles

Roll on Discoveries

Roll on Escalations and on Small Room Scenery or Large Chamber Scenery

Roll on Set Pieces

No Exits

One exit left

One exit straight

One exit right

Two exits, left and right

Two exits, left and straight

Two exits, straight and right

Three exits, left, straight, and right

Stone stairs down

Stone spiral staircase down

Trapdoor down (50 percent chance concealed under rug or furniture)

Round pit with metal ladder rungs, descending 1d4 levels

Stone spiral staircase up

Huge, unlocked door made of semiprecious stone. The door’s etchings illustrate the mythical creation or destruction of the world

A vaulted, echoing chamber filled with 10-foottall statues. The statues sing beautiful liturgical music

This room’s ceiling is radiant with a permanent sunlight spell. The ground is covered with grass and flowers. A tree grows in the middle of the room

Altar on an island rising from a lake of magma

Massive wall or cliff face pierced with sleeping cells. Ladders provide access to each cell

A giant-sized throne, empty or supporting a Gargantuan inanimate skeleton

Ritual room with a floor etched with an arcane circle; flaming skeletons hang from the ceiling like chandeliers

Nave of a cathedral decorated with animated stained glass windows or tapestries

An immense sword is planted into the floor and can’t be removed. It radiates divination magic. A creature that touches the sword gains the benefits of a detect evil and good spell for 10 minutes

Morgue containing six stone slabs, each of which supports an apparently fresh corpse. A magic field encompasses the room; any corpse in the room gains the benefit of gentle repose, and it can answer three questions per day as if targeted by a speak with dead spell

A font or fountain fills with 5 gallons of water or holy water when touched

A cloud of illusory butterflies, moths, or tiny angels fills the area, limiting visibility to 10 feet

Lock: An animated statue or stone guardian stands in front of a door, attacking anyone who tries to pass.

Key: A clay figurine with the word “stag” carved into its chest. Speaking this password deactivates the guardian

Lock: Arcane locked door, above which is written “Passage is denied to unbelievers.” The passphrase “Only the divine name opens the gates” causes the door to open.

Key: A holy book on a lectern, with a bookmark at the passage “Passage is denied to unbelievers. Only the divine name opens the gates

Lock: A permanent wall of fire covers an archway of green stone.

Key: A chest containing 10 pendants of green stone, each depicting a figure walking through fire. Anyone wearing a pendant can walk through the wall of fire unharmed

Lock: A magically sealed white door. Anyone who can’t see the door can open it.

Key: A tapestry shows a blindfolded person opening a white door

Doorways to the left and right; one door is blocked by a portcullis. A lever beyond the open door lowers one portcullis and raises the other

Tapestry depicts the gates to a divine or fiendish domain. Concealed behind the tapestry is a door. (Examination or DC 15 Perception check: a draft ruffles the tapestry)

An unlit fireplace flanked by two wall-mounted candelabras. (Examination or DC 15 Perception check: One of the candelabras is shinier as if frequently touched. Pulling the candelabra opens a secret door)

Door inscribed with the words “The Door of Night.” It unlocks in total darkness and locks when in light

Before crossing a certain threshold, unbelievers must make a Wisdom saving throw (DC 10 + half dungeon level) or become frightened. Frightened creatures who proceed take 2 (1d4) psychic damage per dungeon level

Creatures must make a Deception or Religion check (DC 10 + half dungeon level) to recite a prayer before entering the area. A creature that fails to recite the proper prayer suffers 1 level of strife

Trap based on the dungeon level: level 1–2 commanding voice trap or intoxicating brazier trap; 3–4 cursed altar or sacred flame gem trap ; 5–10 bright mirror trap or sword guardian trap ; 11–16 contagion trap or geas trap ; 17–20 forbidden tome or guilty soul trap

Roll 1d4 on the Obstacles table. You find the key listed in that entry. Make a note of the matching lock. The next Obstacle encountered is that lock

Lone creature from a guard patrol (1 or 2 on Escalations table), not particularly loyal and willing to talk

Guard patrol (1 or 2 on Escalations table) controlled by a heretical faction that seeks to overthrow the temple’s leader. From now on, 50 percent of Escalations are with the heretical faction

Guard patrol (1 or 2 on Escalations table) loyal to a paranoid leader trying to root out heretics. From now on, 50 percent of Escalations are with the heretical faction

Acolyte washing the floor; trusting and helpful

A dusty armory contains a locked and trapped chest. Inside is a +1 weapon that deals +2d6 radiant damage to creatures that worship the temple’s deity

Behind a sliding wall (DC 12 Perception check) is an abandoned chapel to another god. It contains a Minor Treasure and can be used as a haven until enemies discover it

A comfortable lounge with furniture and bookcases on the floor, walls, and ceiling. Gravity in this room is relative: anyone can effortlessly walk up the wall and across the ceiling. 50 percent chance of a Minor Treasure in an end-table drawer on the ceiling

Locked treasure vault containing chests of coins and holy items (one Treasure Hoard and one Minor Treasure)

Guards: may attack intruders unless they’re wearing the proper robes or holy symbols

Level 1–2: acolyte with 1d4 zombies

Level 3–4: 3 or 4 soldiers or [[scout

Level 5–10: blackguard with guard squad ; 2 priests with 1d6 scouts

Level 11–16: priest with 3 shadow demons

Level 17–20: mage with 2 invisible stalkers

Guards: may attack intruders who don’t speak the right password

Level 1–2: 1d8 cultists or guards

Level 3–4: priest with 1d4 acolytes

Level 5–10: bone devil or ogre mage

Level 11–16: 3 or 4 clockwork sentinels or veterans

Level 17–20: knight captain with guard squad ; mage with shield guardian and earth elemental

Denizens: a faction that predates and is hostile to the local overlord (roll or choose from Set Pieces)

Level 1–2: 1d4 acolytes or skeletons

Level 3–4: cult fanatic with 1d8 cultists

Level 5–10: 2 or 3 mummies , skeletal champions , or walking statues

Level 11–16: ascetic grandmaster , vampire , or vampire assassin

Level 17–20: 2 bone devils or cyclops myrmidons

Guards: patrolling

Level 1–2: 1d4 guards or flying swords

Level 3–4: acolyte with 1d8 zombies

Level 5–10: 2 or 3 hell hounds or horde demons

Level 11–16: 4 or 5 wights or zombie knights

Level 17–20: adult black dragon lich ; demilich

Guardians: protecting a sacred space

Level 1–2: 1 or 2 death dogs or spies

Level 3–4: ghost or mummy

Level 5–10: hydra

Level 11–16: 4 elementals (one per element)

Level 17–20: stone guardian with 3 walking statues ; solar

Level 1–2: animated armor or ghast

Level 3–4: 2 gargoyles

Level 5–10: 2 or 3 mummies

Level 11–16: crusher with flame-spitting statue ; 2 invisible stalkers

Level 17–20: 2 chain devils or erinyes

Roll 1d6 on this table to determine an encounter group. The group is nearby (in the nearest unexplored room) and may be detected by tracks, noises, flickering torchlight, or other signs

Return of the Kings. Freed after a long imprisonment, immortal monsters prepare to venture forth and restore their ancient empire or religion. They need knowledgeable advisors—or captives—who can inform them about the state of the modern world.

Level 1–2: priest with 1d4 skeletons

Level 3–4: priest with 1 or 2 zombie knights ; 2 lamias

Level 5–10: deva or forgotten god with 2 high priests

Level 11–16: mummy lord with 3 or 4 mummies

Level 17–20: dread knight champion with 3 or 4 skeletal champions ; balor with 2 priests and 4 veterans

Setting: Throne room decorated with tapestries. Behind one tapestry is a permanent gate leading to another plane.

Secret Society. The leaders of this shrine are dedicated to hiding secret knowledge, prophecies, or an artifact from the outside world. They fight anyone who reaches their inner sanctum.

Level 1–2: priest with 1 or 2 acolytes

Level 3–4: priest with nightmare or walking statue

Level 5–10: guardian naga with 1 to 3 basilisks

Level 11–16: archpriest with clay guardian ; 2 planetars

Level 17–20: greater sphinx with 2 sphinxes or stone guardians ; lich with 6 hell hounds

Setting: The floor’s tiles represent a labyrinth. Whenever a creature first walks on its turn, it can make an Intelligence check. The result is the number of feet it can move on its turn without stepping over a line. The first time on its turn that a creature steps over a line, it takes psychic damage equal to the dungeon’s level. The room’s inhabitants are immune to this damage.

Holy Terror. The leaders of this cult are preparing a ritual to loose an extraplanar being into the world or summon a powerful undead creature. Their plans are on the verge of completion.

Level 1–2: cult fanatic with 1 or 2 cultists

Level 3–4: priest with cambion or malcubus

Level 5–10: high priest with 1d4 mummies or skeletal champions ; 3 cambions with 1d6 + 3 thugs

Level 11–16: archpriest with chained one and 1d8 cultists ; archmage with 4 knights and 2d8 cultists

Level 17–20: archpriest or planetar with solar and 5 or 6 priests

Setting: A 20-foot-diameter portal is forming on the far side of the room. It is an object with AC 10, 20 × the dungeon’s level hit points, and immunity to bludgeoning, piercing, slashing, psychic, and poison damage. If the portal is destroyed, the ritual is ruined. Ladders lead to a balcony around the room.

Book of prayers or forbidden lore containing a rare version of a spell from the cleric or warlock spell list (such as Sebirus’s Imprisoning Skeletal Hands (DDG)

Spell scroll containing a spell from the cleric list appropriate to the area’s tier (tier 0: cantrip or level 1 spell, tier 1: level 2–3 spell, tier 2: level 4–5 spell, tier 3: level 6–7, tier 4: level 8–9)

Jeweled holy symbol, gem, or bag of coins worth an amount appropriate to the tier (tier 0: 10 gp, tier 1: 100 gp, tier 2: 1,000 gp, tier 3: 10,000 gp, tier 4: 100,000 gp)

Holy symbol, garment, or weapon that once belonged to a holy person. Acts as a single bead of necklace of prayer beads

1d6 vials. Roll 1d6: 1–2 holy water, 3–4 potions of healing , 5–6 potions of greater healing

Heretical documents that portray the faith in a startling new light or reveal corruption within its ranks

Holy book that reveals a cosmic secret (such as a previously unknown familial or romantic relationship between a good and evil god)

Sentient item, such as a skeletal hand, a +1 weapon, or a holy symbol. It has Intelligence, Wisdom, and Charisma scores of 10 + 1d6, can communicate telepathically with a creature touching it, and has a goal it wishes to fulfill

Valuables: 1d4 × 100 gp in jewelry, rare silks, or bulky tapestries

Magic (30 percent chance): pearl of power or periapt of health

Valuables: 24 × 100 gp in gold coins, gilded artworks,
or precious metal idols

Magic (40 percent chance): bowl of commanding water elementals or staff of the python

Valuables: 1d6 × 1,000 gp in gold coins, rare books worth 1,000 gp each, or gold tableware

Magic (50 percent chance): magic mirror (handheld) or necklace of prayer beads

Valuables: 1d4 × 10,000 gp in platinum coins, holy relics, or jewelry

Magic (60 percent chance): amulet of health or mace of smiting

Valuables: 1d4 × 100,000 gp in platinum coins,
gems, gold idols, or jeweled holy relics

Magic (70 percent chance): crystal ball or talisman of
pure good

A fresco, mosaic, or tapestry depicting a god, ritual, myth, holy symbol, or sacrifice

Lit braziers

Statues or busts depicting gods or holy champions

Niches in the wall contain statuettes or candles (50 percent chance of a Minor Treasure)

Lectern bearing a holy book (50 percent chance of a Minor Treasure)

Stone slabs set into the floor each bear a name and dates. The slabs are the lids of underground sarcophagi

Wet, scrubbed floor; nearby are buckets of water

Wall-mounted shields, each etched or painted with a holy symbol

Cabinets stocked with vestments, ritual books, candles, incense, and holy symbols (50 percent chance of a Minor Treasure)

Chapel or shrine with an altar and a few benches

Armory. Roll d4: 1 chain mail and martial weapons, 2 light armor and simple weapons, 3 ranged weapons, ammunition, ballistas, and bolts, 4 holy water and potions of healing (50 percent chance of a Minor Treasure)

A comfortable bedroom with beds, chests, and wardrobes for 1d4 + 2 occupants. On the walls are weapon racks, armor stands, and religious paintings (50 percent chance of a
Minor Treasure)

Sparsely furnished bedroom or cell for 1d4 occupants

Latrine or bath

A luxurious dining room with fine wine and silver plates

Ritual room containing a scrying pool

Morgue where corpses are ritually prepared for burial. Contains stone slabs, empty sarcophagi, and chests packed with burial shrouds

Crypt with an altar, religious statues, and a sarcophagus topped with a stone angel (50 percent chance of a Minor Treasure)

Guardroom containing weapon racks, a fireplace, and a small shrine

Kitchen with a baker’s oven and bread-baking ingredients

Kitchen where dead animals are being butchered and cooked

Pantry stocked with flour and beans and hung with herbs

Pantry stocked with fine wines, sweetmeats, and expensive spices

Library containing forbidden texts (50 percent chance of a Minor Treasure)

Study containing a fireplace, comfortable chairs, bookshelves, and a desk covered with sheafs of notes (50 percent chance of a Minor Treasure)

Store room containing paintings, statues, and furniture draped with dusty drop cloths (50 percent chance of a Minor Treasure)

An audience chamber: rows of benches or pews face a dais

A richly decorated throne room: the doors are inlaid with gold, the ceiling is a magnificent religious painting, and the throne is carved to resemble the seat of a god

A dining hall: religious passages warning against gluttony are carved into the walls

A banquet hall with long tables, stacks of clay bowls, and a gruel-filled cauldron in a huge fireplace

Barracks or communal sleeping chamber

Dormitory containing bunk beds, chests of identical uniforms or vestments, and a small shrine

Temple with an altar or pulpit surrounded by benches

Temple containing statues of gods and divine servants. The altar is a stone slab

Temple with a balcony, an altar atop a dais, and braziers of incense (50 percent chance of a Minor Treasure)

Scriptorium containing desks, writing supplies, and shelves of scrolls (50 percent chance of a Minor Treasure)

Training room containing armor, shields, and stacks of prayer books. Against one wall are scorched training dummies

A giant pipe organ (50 percent chance one note doesn’t play; a Minor Treasure is hidden in one of the pipes)

Crypt containing sarcophagi (50 percent chance of a Minor Treasure)

A guardroom decorated with war banners and shields. Candles, decks of cards, and empty wine bottles litter several small tables

Kitchen where vast quantities of gruel or soup are being prepared

Library containing religious texts

Store room containing odds and ends of all sorts: religious vestments, barrels of foodstuffs, statues, a ballista (50 percent chance of a Minor Treasure)

A magical prison with several cells. Each cell is filled with a permanent antimagic zone (DDG)

Narrow passage. Roll on Passage Contents and Exits. For passage width, roll 1d6:

6 - 11

Passage. 10 feet wide. Roll on Passage Contents and Exits.

Wide passage. Roll on Passage Contents and Exits. For passage width, roll 1d6:

1 - 10

Empty

Roll on Passage Scenery

Roll on Novelties

Roll on Obstacles

Empty

Roll on Novelties

Roll on Obstacles

Roll on Discoveries

Roll on Escalations and on Chamber Scenery

Roll on Set Pieces

No Exits

One exit left

One exit straight

One exit right

Two exits, left and right

Two exits, left and straight

Two exits, straight and right

Three exits, left, straight, and right

Slimy stone stairs down

Grating up

Grating down

Pipe up

Pipe down

Metal ladder up

Metal ladder down

Sloping waterway up or down (50 percent chance of each)

Pulley elevator up or down (50 percent chance of each)

A filthy altar surrounded by torches and arcane markings

Cult shrine to a prohibited faith

Amidst moldy bedrolls, a faded map of the sewers with various locations marked is pinned to the wall

Makeshift classroom. A selection of thieves’ cant glyphs and their meanings is written on the wall

Bioluminescent, telepathic mold grows on the walls. It is friendly and converses telepathically with passers-by

A pool of congealed alchemical slurry. A creature that touches the slurry regains 3 (1d6) hit points, recovers a 1st-level spell slot, and becomes poisoned for 1 hour. The slurry then becomes inert

A gigantic snakeskin fills most of the room. The scales glow with a soft, iridescent light

A disused side passage is overgrown with edible fungus

A partially collapsed tunnel conceals a clean and dry area that provides sanctuary for one long rest

Makeshift docks line the banks of an underground river or lake

Steel or stone supports are spaced evenly around the area, indicating something unusually heavy above

Water flows from a pipe high on the wall, creating an oddly beautiful waterfall

Lock: The entire area is flooded with sewage, and the valve to drain it is missing a handle.

Key: A handle that fits the valve

Lock: An iron door has rusted shut (DC 18 Strength check to open).

Key: A flask of a solution that dissolves the rust, allowing the door to operate freely

Lock: Jammed sluice gate.

Key: Long bar that can pry open the gate

Lock: Iron grate secured with a padlock that has rusted solid (DC 18 Strength check to open).

Key: A set of bolt cutters that can cut through the padlock

Pocket of poisonous gas. Area is affected as per the cloudkill spell

Vast pool of raw sewage with no apparent way across

Fast-moving storm drain current with no bridge across

A dry “sluice gate” in an odd place conceals an exit

Magical illusion of a mass of waste blocking an exit. DC 13 Perception check: no smell

A submerged exit leads to a flooded tunnel

A tight squeeze through an exit tunnel, 1d12 + 12 inches wide

Draining a cistern reveals a concealed exit

Trap based on the dungeon level: level 1–2 acid bucket trap or slippery floor trap; 3–4 oil pool trap or poison gas trap ; 5–10 gelatinous cube pit trap or ratling-catcher trap ; 11–16 monster pit trap or water-filled room; 17–20 plague poison lock or water-filled dungeon

Roll 1d4 on the Obstacles table. You find the key listed in that entry. Make a note of the matching lock. The next Obstacle encountered is that lock.

Supply cache. Contains 2d6 days of rations, 1d4 50-foot coils of rope, two sets of climber’s gear, a healer’s kit, a hatchet, 1d4 ladders, a pickaxe, and two daggers

Armory. Contains 1d10 nonmagical simple or martial weapons and two suits of Medium or Small leather armor

Ratling larder. Crates of food are patrolled by cats that keep tiny vermin at bay

Cultist cache. Boxes and jars filled with ritual components and 2d6 spell scrolls of level 1d4 - 1 (results of 0 indicate a cantrip) are crammed in poorly concealed shelves

Minor Treasure hidden behind a waterfall of filth

Recently hatched dragon, smaller than a wyrmling (use stats for a lizard )

The sewer connects to the cellar of a noble’s townhouse or other above-ground structure

The bottom of a wishing well; the area is strewn with 6d6 gp worth of copper and silver coins

Guards: on patrol on behalf of the surface city or the sewer’s local overlord (roll or choose from Set Pieces). Demand to know intruders’ business

Level 1–2: 1d8 bandits or guards

Level 3–4: 1d8 soldiers ; 3 thugs

Level 5–10: veteran with 1d6 thugs

Level 11–16: 2 or 3 blackguards or gladiators

Level 17–20: assassin with 1d6 + 4 cutthroats or thugs

Guards: skulking near their secret lair

Level 1–2: 1d8 cultists

Level 3–4: 3 or 4 cutthroats or thugs

Level 5–10: 2 or 3 doppelgangers

Level 11–16: 2 cambions , night hags , or vampire spawn

Level 17–20: vampire with vampire spawn

Intruders: stealthily passing by on their way somewhere else

Level 1–2: 1 or 2 cutthroats or thugs

Level 3–4: doppelganger or oozefolk oozemancer (DDG)

Level 5–10: alchemist or assassin

Level 11–16: vampire , vampire assassin , or vampire mage

Level 17–20: master assassin , master thief , or 2 assassins

Denizens: hunting

Level 1–2: 2 or 3 ratling scavengers

Level 3–4: dire centipede , gelatinous cube , or gelatinous tube

Level 5–10: 2 or 3 euphoria jellies (DDG) or flash cubes (DDG)

Level 11–16: troll hulk (DDG)

Level 17–20: 2 assassins or ur-otyughs

Denizens: in lair

Level 1–2: 2d4 giant rats or poisonous snakes

Level 3–4: 3 ghouls or shadows

Level 5–10: otyugh , ur-otyugh , or sewer chimera

Level 11–16: 2 elder black puddings or otyughs

Level 17–20: rakshasa with cambion

Roll 1d6 on this table to determine an encounter group. The group is nearby (in the nearest unexplored room) and may be detected by tracks, noises, flickering torchlight, or other signs

Criminal Hideout. A gang or thieves’ guild has a base here.

Level 1–2: 1 or 2 thugs with 1d4 bandits or wolves

Level 3–4: crime boss or gladiator with 1 or 2 thugs

Level 5–10: assassin with 1 or 2 veterans

Level 11–16: archmage or master assassin with 2 assassins

Level 17–20: master assassin or 3 gladiators with 3 assassins and 1 mage

Setting: The area resembles an underground shantytown with numerous tight passages and close corners. Visibility is limited to a range of 20 feet before a corner or makeshift structure blocks line of sight.

Sewer Predator. Something hungry and dangerous lurks under the water.

Level 1–2: 2 giant constrictor snakes , gibbering mouthers , or will-o’-wisps

Level 3–4: giant crocodile and 1d4 + 1 crocodiles ; sewer chimera

Level 5–10: ur-otyugh and 1 or 2 otyughs ; hydra

Level 11–16: troll hulk (DDG) and 2 or 3 trolls

Level 17–20: draconic horror (DDG) and 2 or 3 murmuring worms or behirs

Setting: The creature’s watery lair is full of unpredictable currents. On initiative count 20 each round, a wave sweeps through the area in a random direction. Creatures that fail a Strength saving throw (DC 10 + half dungeon level) are pushed 30 feet in the direction of the flow. The predators can choose to fail or automatically succeed on this saving throw.

Cult Cell. Cultists hide their illicit activities below cities for many of the same reasons ordinary criminals do, and the reach of the sewer tunnels means they can snatch victims from anywhere.

Level 1–2: cult fanatic with 1d4 cultists

Level 3–4: 1 or 2 cult fanatics with 2 oculites (DDG)

Level 5–10: forgotten god or glabrezu with 1d4 cult fanatics

Level 11–16: aboleth , aboleth champion (DDG), and 1d6 maw swarms (DDG)

Level 17–20: aboleth fallen ascendant (DDG), aboleth , and 2 or 3 aboleth champions (DDG)

Setting: The area features an altar and a central pool filled with black water that obscures the vision of trespassers only. Creatures with a swim speed gain total concealment while beneath the water. Cultists attempt to herd interlopers near the water.

Tide-driven stone gates close behind the adventurers, forcing them to escape via a 100-foot underwater swim through fetid water. At the start of each of its turns, each creature in the water must succeed on a Constitution saving throw (DC 10 + half dungeon level) or become poisoned and unable to hold its breath. At the end of the swim, a metal grate (DC 10 + half dungeon level Strength check to break) blocks the exit.

A sluice gate opens, creating a waterfall that sweeps the adventurers to a new area or out of the sewer. Each creature must make three Strength, Dexterity, or Constitution saving throws (their choice), taking 2 (1d4) damage per dungeon level per failure.

Set of directions that leads to treasure — possibly in a mansion accessible through the sewer

Spell scroll containing a spell appropriate to the area’s tier (tier 0: cantrip or level 1 spell, tier 1: level 2–3 spell, tier 2: level 4–5 spell, tier 3: level 6–7, tier 4: level 8–9)

Treasure worth an amount appropriate to the tier (tier 0: 10 gp, tier 1: 100 gp, tier 2: 1,000 gp, tier 3: 10,000 gp, tier 4: 100,000 gp). Roll
1d10 to determine treasure type: 1–3 coins, 4–6 jewelry, 7–8 obviously stolen housewares, 9 fiendish idol, 10 forbidden tome

1d6 vials. Roll 1d6: 1–3 potions of healing , 5–6 potions of water breathing

Valuables: 1d4 × 100 gp in copper, silver, or gold coins

Magic (30 percent chance): pipes of the sewers or ring of swimming

Valuables: 2d4 × 100 gp in gold coins or jewelry

Magic (40 percent chance): cloak of protection or ring of water walking

Valuables: 1d6 × 1,000 gp in gold coins, bulky housewares, or jewelry

Magic (50 percent chance): dagger of venom or ring of evasion

Valuables: 1d4 × 10,000 gp in gold and platinum coins or gems

Magic (60 percent chance): folding boat or nine lives stealer

Valuables: 1d4 × 100,000 gp in gold coins, gems, or property deeds

Magic (70 percent chance): luck blade or well of many worlds

Footbridges across drainage channel in middle of passage

Filthy, stinking mud makes the area difficult terrain

Mundane graffiti or thieves’ cant glyphs on walls. May contain useful information

Drainage channel covered with boards. There’s a table and chairs and a couple of bookcases full of moldy books

An open secret door reveals empty barrels and crates

Predator’s den containing gnawed bones and other garbage

Cement or stone blocks attached to chains, used by a local criminal element to dispose bodies

Sewer grate leads to a secret above-ground hideout

Ossuary. Neat stacks of humanoid bones fill niches. Memorial plaques identify the remains

Outflow tunnel. Water streams through a heavy grate into a nearby body of water, such as a river or lake

Benches and tools fill a makeshift workspace. The usual board flooring is reinforced with heavier beams and metal braces.

Abandoned, one-person hovel containing candles and a sleeping pallet

A stack of 10-foot poles affixed with hooks, used for dredging drainage channels

Storm runoff reservoir. The water is relatively clean and clear

Reservoir full of raw sewage

Flow control room. A vast array of pipes and valves

Fast-moving water with several sturdy access bridges across the flow

Maintenance storage area. Spare lengths of pipe are stacked neatly on pallets. Tools hang on peg boards behind locked grates

Barrels of lye and other chemicals (treat as acid) are covered in tarps

The exits are hatches like those found on a submarine

Eggs incubating in a nest of warm filth; depending on the tier, the eggs may hatch into giant centipedes , crocodiles , dinosaurs, or otyughs

One exit leads to ancient ruins. Switch to the ruin tables for the areas in this direction

One exit leads to catacombs. Switch to the tomb tables for the areas in this direction

One exit leads to natural caves. Switch to the Freelinking: Node title cavern does not exist tables for the areas in this direction

Narrow passage. Roll on Passage Contents and Exits. For passage width, roll 1d6:

2 - 7

Passage. 10 feet wide. Roll on Passage Contents and Exits.

Small room. Roll on Room and Chamber Contents and Exits. For room size, roll 1d4:

15 x 15 ft.

15 x 20 ft.

20 x 20 ft.

1 - 10

Empty

Roll on Passage Scenery

Roll on Escalations

Roll on Obstacles

Empty

Roll on Novelties

Roll on Obstacles

Roll on Discoveries

Roll on Escalations and on Small Room Scenery or Large Chamber Scenery

Roll on Set Pieces

No Exits

One exit left

One exit straight

One exit right

Two exits, left and right

Two exits, left and straight

Two exits, straight and right

Three exits, left, straight, and right

Stone stairs down

Stone spiral staircase down

Trapdoor down

Ladder up or down (50 percent chance of each; 50 percent chance the ladder is broken or missing)

Stone spiral staircase up

A mundane object — such as a serving dish, chamber pot, or artisan’s tool — that illustrates what day-to-day life was like in the ruin

A pile of rubble where one wall has caved in. A muffled voice can be heard from under the rubble. Underneath the rubble is a mechanical bronze statue that endlessly recites poetry

A dressing room containing a shattered mirror and wardrobes filled with rotten finery. A single robe is in good shape and radiates illusion magic. While wearing it, a person is blind and deaf to the real world and sees and hears the past experiences of its original wearer, a noble or monarch. Experiences may include a flirtation at a ball, boring judgments in an audience chamber, or hunting

A cobwebbed ballroom containing ghostly illusions (or animated skeletons) of dancing couples dressed in the fashionable garb of hundreds of years ago. If you watch for some time, a dancer discovers one of her jewels is missing. The jewel is still hidden in a corner

A skull mounted on the wall like a trophy. One of the ruin’s denizens can magically see through the skull’s eyes and speak through its mouth (see Set Pieces to determine the creature)

A seemingly magnificent throne room: illusion magic hides the fact that the throne is stripped of gold, the cloth hangings and carpet are rotted, and the statues are smashed. An object takes its true form once removed from the room. The effect can be dispelled as a 4th-level spell. DC 13 Perception check: a smell of rot

Room is lit by flitting, flaming bats that shed light like torches (as bats with immunity to fire damage)

Marble room decorated with statues, gilt mirrors, and ceiling frescoes; the floor is knee-deep in slimy water

Exits are through the fanged mouths of grotesque carvings

Statues stand atop battlemented balconies

A plaque dedicated to the ruin’s founder or architect. Touching the plaque triggers a permanent magic mouth that speaks the dedication aloud

The enormous remains of what was once a titan-sized statue

Lock: A lock set in the middle of a carved heraldic shield.

Key: A key with a grip like a sword pommel

Lock: A lock seized by rust; attempts to pick the lock are made with disadvantage unless it is oiled.

Key: A rusty key

Lock: A lock inscribed with a riddle.

Key: A key with a handle carved to resemble the riddle’s solution

Lock: A crescent-shaped depression in a door.

Key: A crescent-shaped necklace

A cave-in blocks the way forward. It takes several minutes of work to dig out a passage wide enough to crawl through

A crumbling wall blocks passage. DC 10 Perception check: Cracks in the wall outline a secret door with no obvious way to open it. A DC 13 Investigation check reveals the brick that must be pressed to open the door

A fresco — perhaps depicting a cloaked man opening a door, a three-headed dog, or the gate to a white-walled city — is split by a faint crack down the middle. Pushing on the fresco opens the secret door.

Against a wall is a heavy piece of furniture, such as a grandfather clock or empty bookcase. A DC 10 Perception check reveals scrapes on the floor near the furniture. Moving the furniture reveals a concealed door.

Wooden door with a bell. Unless precautions are taken, the bell rings when the door is opened, alerting creatures within 50 feet.

Roll 1d4 on the Obstacles table. You find the key listed in that entry. Make a note of the matching lock. The next Obstacle encountered is that lock.

Harmless undead spirits, unaware of onlookers, re-enacting a scene from their lives that reveals a secret

Adventurers (entry 3 on Escalations table), looking for help defeating a dangerous threat (roll on Set Pieces)

A friendly hermit or outcast

A frieze that casts a new light on the area’s history (depicting a great cyclops or skeleton civilization, for instance)

An inanimate (or animate) skeleton wearing the signet ring of a royal house and bearing a Minor Treasure associated with the house

The inanimate skeletons of royalty and nobles lying among ruined luxury. 1d4 Minor Treasures can be found

Guards: patrolling on behalf of the local overlord (roll or choose from Set Pieces)

Level 1–2: cutthroat or scout with 1d4 bandits

Level 3–4: 1 or 2 ogres

Level 5–10: blackguard or cambion with 1d4 + 1 thugs

Level 11–16: 3 or 4 ettins or minotaur

Level 17–20: chain devil or ogre mage with 3 or 4 werewolves

Inhabitants

Level 1–2: 1d4 goblins or kobolds

Level 3–4: 2 bugbears with 1d6 goblins

Level 5–10: 1 or 2 trolls

Level 11–16: 2 cyclopes or medusas

Level 17–20: minotaur champion ; 4 minotaurs

Adventurers exploring the ruins

Level 1–2: acolyte , scout , and spy

Level 3–4: druid or priest with berserker

Level 5–10: mage with 2 knights

Level 11–16: assassin with gladiator

Level 17–20: archmage with 3 veterans

Guardians: lurking

Level 1–2: 1d4 giant poisonous snakes or rust monsters

Level 3–4: 1 or 2 dire centipedes or gelatinous cubes

Level 5–10: otyugh

Level 11–16: 3 or 4 ghosts

Level 17–20: rakshasa with 1d4 weretigers

Guardians:guarding a location

Level 1–2: 1 or 2 shadows

Level 3–4: blazing black pudding

Level 5–10: 4 or 5 ghasts

Level 11–16: 3 or 4 vampire spawn

Level 17–20: wraith lord with 1 or 2 wraiths ; 3 cyclopes

Level 11–16: iron guardian ; 3 or 4 water elementals

Level 17–20: 2 giant fire elementals ; 2 shield guardians

Roll 1d6 on this table to determine an encounter group. The group is nearby (in the nearest unexplored room) and may be detected by tracks, nearby noises, the flickering of torches, or other signs

Settler’s Lair. This part of the ruin has been recently conquered by an outside group

Level 1–2: kobold broodguard with 3 or 4 kobolds ; 3 or 4 bugbears

Level 3–4: bugbear chief with 2 to 4 bugbears ; 3 azers

Level 5–10: alpha werewolf with 3 or 4 werewolves ; 3 cyclopes

Level 11–16: high priest with 2d4 priests

Level 17–20: 2 adult shadow dragons with 2d6 kobolds ; adult red dragon with 2 or 3 salamanders

Setting: A settler patrol (3 or 4 of the weakest monster) is away exploring the ruin. Once combat begins, the patrol returns within 3 rounds.

Spirits of the Past. These undead have haunted the ruins for centuries, since the days they ruled as mortals.

Level 1–2: ghast with 2 ghouls

Level 3–4: wight with 2d4 zombies

Level 5–10: skeletal warlord (DDG) with 2d6 skeletons

Level 11–16: vampire warrior with 2 or 3 vampire spawn

Level 17–20: dread knight with skeletal warlord (DDG) and 2d10 skeleton immortals (DDG); lich with demilich

Setting: The leader of the group rests in a sarcophagus. Once combat begins, it or another creature must use an action to raise the lid.

Gate. A planar rift to the hells threatens to overwhelm the area unless it is sealed

Level 1–2: imp with 1d6 lemures

Level 3–4: 2 or 3 horde demons or bearded devils

Level 5–10: cambion with 1d4 horde demons or bearded devils

Level 11–16: rakshasa with 1 or 2 night hags

Level 17–20: marilith with 2 or 3 vrocks

Setting: A planar gate pulses in a corner of the room. A creature can use an action to make an Arcana check (DC 10 + half dungeon level); three successes close the portal. Fiendish reinforcements may arrive through the portal.

Fallen Empire. An immortal ruler schemes to regain the dominion they once possessed

Glowing, shattered mirror (if repaired for 25,000 gp, acts as a crystal ball )

Deed of land ownership—and possibly of nobility

Spell scroll containing a spell appropriate to the area’s tier (tier 0: cantrip or level 1 spell, tier 1: level 2–3 spell, tier 2: level 4–5 spell, tier 3: level 6–7, tier 4: level 8–9)

Cache of ancient coins worth an amount appropriate to the tier (tier 0: 20 ep, tier 1: 100 gp, tier 2: 500 gp, tier 3: 1,000 pp, tier 4: 10,000 pp)

Valuables: 1d4 × 100 gp worth of copper, silver, or gold coins, or a gold idol worth the same amount

Magic (30 percent chance): immovable rod or wand of secrets

Valuables: 2d4 gp worth of silver, electrum, and gold coins or art objects

Magic (40 percent chance): handy haversack or ring of protection

Valuables: 1d6 × 1,000 gp worth of gold and platinum coins or gems

Magic (50 percent chance): +1 armor or boots of speed

Valuables: 1d4 × 10,000 gp worth of platinum coins or jewelry

Magic (60 percent chance): belt of dwarvenkind or flame tongue

Valuables: 1d4 × 100,000 gp worth of coins of all denominations, gems, jewelry, and artworks, piled in heaps

Magic (70 percent chance): Ioun stone of mastery or ring of three wishes

Dusty suits of armor stand against a wall

The area is charred as if by a long-past fire

Brackets hold the stubs of burnt-down torches

An arrow drawn on the wall in chalk

A cracked wall or ceiling; a DC 18 Strength check could smash it, filling the corridor with rubble and perhaps opening another passage

A door ripped off its hinges

A fresco depicting an ancient ruler on a throne or in battle

A chamber that’s empty of furniture but hung with rotting paintings and tapestries. A chandelier lies smashed on the ground

An armory containing rotted bows and arrows. 30 percent chance of a dozen +1 arrows, a javelin of lightning , or similar magic item, in noticeably better condition than the other weapons

A musty dining room with rotted food on dusty plates

Cramped sleeping quarters for soldiers or servants; bunk beds line the walls. The beds are stuffed with moldy straw

A once luxurious bedroom with rotting bed covers, broken chests, and wardrobes filled with moth-eaten finery

A cold, dark bedchamber: the bed’s sheets are bloodstained, and there is no fireplace or lighting

A dusty, untended shrine

A kitchen covered in spiderwebs. 50 percent chance of a locked cabinet containing vintage wines worth several hundred gold pieces

A store room containing crates of rusty tools and weapons

An empty prison containing shackles and torture implements

A workshop with ruined clocks of all sizes

A forge with stacks of rusty swords

Stone benches, a defunct fountain, and smashed marble statues

A once beautiful throne room: the doors have been stripped of their gold inlays, statues are missing from pedestals, the fresco on the ceiling is faded and cracked, and the throne is marked with cavities where gems have been pried out

A columned audience chamber lined with defaced statues

A ruined banquet hall: long tables are broken, chairs are overturned or smashed, and shards of dusty glass litter the floor

A fire-blackened mess hall filled with tables and benches that crumble if any weight is placed on them

A store room containing paintings, statues, and furniture draped with dusty drop cloths

A library of scrolls that crumble when unrolled

A crypt containing 1d4 empty sarcophagi, their lids smashed

The ceiling on one side of the room has collapsed, creating an area of difficult terrain

A laboratory with a stitched-together corpse bound with electrum chains. A notebook describes repeated failed attempts to create a flesh golem

The cracks between the stones are green with mold

Narrow passage. Roll on Passage Contents and Exits. For passage width, roll 1d6:

3 - 9

Passage. 10 feet wide. Roll on Passage Contents and Exits.

Small room. Roll on Room and Chamber Contents and Exits. For room size, roll 1d4:

15 x 15 ft.

15 x 20 ft.

20 x 20 ft.

1 - 10

Empty

Roll on Passage Scenery

Roll on Escalations

Roll on Obstacles

Empty

Roll on Novelties

Roll on Obstacles

Roll on Discoveries

Roll on Escalations and on Small Room Scenery or Large Chamber Scenery

Roll on Set Pieces

No Exits

One exit left

One exit straight

One exit right

Two exits, left and right

Two exits, left and straight

Two exits, straight and right

Three exits, left, straight, and right

Sloping tunnel down

Ladder down

Shaft down

Ladder up

Shaft going 1d4 levels down

Deposit of beautiful (but worthless) crystals that refract light sources around the area in prismatic rainbows

Abandoned giant spider lair choked with webs; the mummified, long-dead bodies of humanoids or other subterranean creatures hang from the ceiling

A wooden shack serves as a makeshift foreman’s office. It’s cozily lit with oil lamps and is a good place to rest

Security checkpoint where guards search workers for contraband such as ore or precious stones

Healthy vein of whatever the mine was built to extract. The area is well lit. Tools, piles of ore sorted by quality, and carts of mined-out dirt and stone fill the area

Elevator beside an underground waterfall. The journey up or down is made to the sound of rushing water, and spray is ever-present

A smaller deposit of some valuable material the mine wasn’t built to extract, marked for later extraction

Workshop filled with broken mine carts and other equipment in need of repair

Pitch dark area filled with resonant crystals that hum eerily and distort speech

Ancient, subterranean room that the mine broke into. The room is empty but features impressive wall carvings

An enormous, supernaturally durable crystal or boulder. Too big to extract, the miners eventually gave up and mined around it, making it the centerpiece of an otherwise empty chamber

Chamber filled with bioluminescent fungus. Pieces of makeshift furniture indicate that someone has been relaxing here

Lock: Broken, immoble mining elevator. One of the gears has broken teeth, preventing the winch mechanism from working.

Key: A replacement gear.

Lock: Shut-down mining machine blocks a passage.

Key: A power crystal that allows the characters to move the machine.

Lock: A massive crystal blocks a passageway.

Key: A barrel of alchemical solvent that can safely dissolve the crystal

Lock: A passage blocked by a cave-in. Abandoned grimlock explosives have been set but detonate only when exposed to the correct sonic frequency.

Key: A modified portable telegraph (see Equipment) that emits the proper frequency and can detonate the explosives, clearing the passage

An apparent cave-in is actually a non-magical optical illusion caused by the uniformity of color and texture of the stone. DC 20 Perception check to spot a tight but navigable path along one edge

Section of the wall embedded with colorful crystals. DC 15 Perception check to notice one of the crystals looks unusually polished for one still in the earth. Pressing the crystal opens a secret door

Close examination (DC 15 Investigation or Perception check) of the wooden walls of this supported tunnel reveals a set of seams. The door opens freely away from the tunnel’s interior, and closes automatically on a spring

An extra button hidden on the underside of a mining machine’s control panel (DC 15 Investigation check to notice) raises a secret door

Trap based on the dungeon level:

level 1–2 caltrops trap or false hoard trap ;

3–4 falling room trap or lidded pit trap ;

5–10 crushing pit trap or false trapdoor trap ;

11–16 crusher trap or hezrou trap;

17–20 deepest collapsing dungeon trap or plummeting room trap

Roll 1d4 on the Obstacles table. You find the key listed in that entry. Make a note of the matching lock. The next Obstacle encountered is that lock

A forgotten chunk of some precious substance (gold, mithral, a ruby, etc.) has rolled into a dusty corner. It is worth 500 gp (or 5,000 gp on dungeon level 10 or higher)

Unusually sociable earth elemental embedded in a stone wall. Is actively helpful so long as nobody tries to mine the wall it’s embedded in

Broken-down mining machine. Can be repaired with a DC 18 Engineering check or scrapped for 225 gp worth of parts

Local surveying party and security detail. Friendly toward other humanoids unless they have a specific reason not to be

Abandoned supply room. Contains 2d8 tins of dwarven rations, two pickaxes, an ascender/descender set (see Equipment), and four coils of hempen rope

Vein of gems. 1d10 gems can be collected without mining. If mined for several weeks, the vein produces a maximum of 50 more gems. The type of gem varies by dungeon level: 1–4 10 gp gem such as quartz, 5–10 100 gp gem such as garnet, 11–16 1,000 gp gem such as sapphire, 17–20 5,000 gp gem such as ruby

Miners, working on behalf of local overlord (roll or choose from Set Pieces). May be suspicious or hostile

Level 1–2: 1d6 + 1 commoners or kobolds

Level 3–4: 1 or 2 azers

Level 5–10: azer forgemaster or fire elemental with 2 or 3 azers

Level 11 - 16: genie (earth) with 2d4 dust mephits

Level 17–20: 2 genies (earth)

Guards: on the lookout for thieves

Level 1–2: 1d4 goblins or guards

Level 3–4: 2d4 deep dwarf soldiers , deep gnome scouts , mountain dwarf soldiers , or scouts

Level 5–10: 3 to 5 azers

Level 11–16: genie (earth)

Level 17–20: master assassin ; 2 assassins and 3 thugs

Raiders or interlopers

Level 1–2: 2d4 kobolds

Level 3–4: doppelganger or intellect devourer

Level 5–10: blackguard or cambion with 2d4 soldiers

Level 11–16: assassin with 2d4 thugs

Level 17–20: rakshasa with 1d4 doppelgangers

Guardians: guarding their lair

Level 1–2: 3 or 4 goblins

Level 5–10: 2 minotaurs

Level 11–16: dread troll with 1 or 2 trolls ; troll hulk

Guardians: lurking

Level 1–2: 1d4 giant centipedes , giant fire beetles , or rust monsters

Level 3–4: 3 or 4 ghouls , giant spiders , or shadows

Level 5–10: 3 or 4 dire centipedes , gricks , or mimics

Level 11–16: 2 or 3 earth elementals or xorn

Level 17–20: minotaur champion or purple worm

Roll 1d6 on this table to determine an encounter group. The group is nearby (in the nearest unexplored room) and may be detected by tracks, noises, flickering torchlight, or other signs

Active Mine. Miners have claimed the riches of this mine

Level 1–2: kobold broodguard and 2 or 3 kobolds ; 2 azers

Level 3–4: azer forgemaster with 2 or 3 azers ; salamander

Level 5–10: cambion with 2d6 thugs and 2d10 commoners

Level 11–16: mountain dwarf lord with 2 mountain dwarf defenders and 2d6 mountain dwarf soldiers ; 2 gladiators with 1d6 + 4 azers

Level 17–20: minotaur champion with 2d4 minotaurs ; 2 genies (earth) with 3 or 4 earth elementals

Setting: A wide chamber criss-crossed with mine cart tracks and levers to release the carts.

Subterranean Predator’s Lair. The mining operation has attracted an underground predator (or pack of them). Its bone-littered lair must be cleared to make the mines safe again.

Level 1–2: dire centipede with 1 or 2 giant centipedes ; 2 ankhegs

Level 3–4: ankheg queen with 2d4 ankheg spawn ; bulette

Level 5–10: ur-otyugh with 1 or 2 otyughs ; 3 or 4 stone sharks

Level 11–16: supermutant rust monster (DDG) with 1 or 2 mutant rust monsters (DDG

Level 17–20: 2 or 3 purple worms

Setting: A foul, sulfurous stream flows lazily through the middle of a bone-filled den. Characters with a sense of smell must make a DC 10 Constitution saving throw each turn or be poisoned until the start of their next turn

Too Deep, Too Greedily. The mine broke into the resting place of some horrible thing that should not have been disturbed. Darkness permeates and magma flows here.

Level 1–2: 2 or 3 ghouls

Level 3–4: 2 intellect devourers

Level 5–10: forgotten god and 1 or 2 blackguards ; 2 salamanders

Level 11–16: draconic horror (DDG) and 3 or 4 gibbering mouthers

Level 17–20: balor general or balor and 4 to 6 shadow demons

Setting: This dark cavern is lit only by the magma that comprises most of the floor. Irregularly spaced islands of varying sizes rise from the magma.

Unquiet Earth. The earth itself rebels against the miners’ intrusions

Several well-labeled vials of an explosive chemical (treat as necklace of fireballs )

1d6 vials. Roll 1d6: 1–3 potions of healing , 5–6 potions of hill giant strength

+1 war pick (or, on dungeon level 10 or deeper, prospector’s pick)

elemental gem containing an earth elemental

A lockbox containing the miners’ wages (tier 0: 100 gp, tier 1: 250 gp, tier 2: 2,500 gp, tier 3: 25,000 gp, tier 4: 250,000 gp

Valuables: 1d4 × 100 gp worth of metal ore or uncut gems

Magic (30 percent chance): bag of holding or circlet of blasting

Valuables: 2d4 × 100 gp worth of bars of precious metal or gems

Magic (40 percent chance): brazier of commanding fire elementals or gem of brightness

Valuables: 1d6 × 1,000 gp worth of bars of precious metal or gems

Magic (50 percent chance): wand of enemy detection or winged boots

Valuables: 1d4 × 10,000 gp worth of gems

Magic (60 percent chance): ring of telekinesis or stone of controlling earth elementals

Valuables: 1d4 × 100,000 gp worth of gold and platinum coins, mithral and adamantium bars, or gems

Magic (70 percent chance): ring of elemental command or vorpal blade

Mined-out node. Whatever the mine was built to extract has been exhausted

Connecting room or passage. Exists primarily as a waystation between other locations. Signs mark the exits

Broken mining cart sitting next to a track

Collapsed tunnel leading to an inactive area of the mine

Graffiti scratched or chalked across the walls

Roosting bats. The ground is carpeted in guano

Rivulets of water run down the walls. The water is safe to drink but gathering more than a few drops would take hours

A miner’s pick still buried in the wall

A stack of lumber used to shore up unstable areas

Worker’s ready room. Pick axes and mining helmets are lined up neatly on shelves along the walls

Worker’s room. As above, but the room is a mess. Personal effects are mixed among the improperly stored equipment

Supply room. Spare pick axes, lanterns, and other common mining gear is stored here

Break area. Tables and chairs sit empty

Decommissioned security checkpoint

Latrines

Supply room. Barrels of nails, stacks of timber, and boxes of rations are neatly stacked and cataloged

Deposit of worthless, mundane crystals

Section of natural cave

Assembly station for mining supports. Cluttered with timber and sawhorses

Area is damp and drippy. Stalactites and stalagmites cover the ceiling and floor, respectivel

Ancient, dried-out bones of some underground creature huddled in a corner

Underground lake in a cavernous natural cave

Mess hall. Rows of dining tables sit beneath lanterns hanging from the ceiling

Kitchen. Stoves and cooking pots sizzle and bubble. Crates of edible fungus abound

Heavy mining machines are parked here, awaiting further usage or repairs

Ore processing machines. Grinders, crushers, and conveyor belts crisscross this noisy area. Perception checks based on hearing are made at disadvantage

Staging area for mine expansion. Dozens of pre-built supports of varying sizes are stacked in piles around the room

Processing. Inbound supplies are received, sorted, and sent off to other areas of the mine. Workbenches and sorting tables sit beside piles of crates

Central switching station for an elaborate minecart network. Several mine carts (either full or empty) are parked here, ready to be dispatched into other parts of the mine

Slain purple worm partially broken down for food and removal from the mine. Resembles a whaling operation

Summoning circle

Docks line the banks of an underground river or lake

Narrow passage. 5 feet wide. Roll on Passage Contents and Exits.

2 - 7

Passage. 10 feet wide. Roll on Passage Contents and Exits.

Wide passage. Roll on Passage Contents and Exits. For passage width, roll 1d4:

15 x 20 ft.

20 x 20 ft.

20 x 30 ft.

Large chamber. Roll on Room and Chamber Contents and Exits. For chamber size, roll 1d6:

30 x 30 ft.

30 x 40 ft.

40 x 50 ft.

50 x 50 ft.

1 - 10

Empty

Roll on Passage Scenery

Roll on Escalations

Roll on Obstacles

Empty

Roll on Small Room Scenery or Large Chamber Scenery

Roll on Novelties

Roll on Obstacles

Roll on Discoveries

Roll on Escalations and on Small Room Scenery or Large Chamber Scenery

Roll on Set Pieces

No Exits

One exit left

One exit straight

One exit right

Two exits, left and right

Two exits, left and straight

Two exits, straight and right

Three exits, left, straight, and right

Stone stairs down

Stone spiral staircase down

Trapdoor down (50 percent chance concealed under rug or furniture)

Floor tile inscribed with a red X. Anyone standing on it is teleported to the level below

Stone spiral staircase up

Complex illusions conceal the walls, ceiling, and floor so that a visitor appears to be in a snowy wilderness or an expanse of starry space. The room’s exits are clearly visible

Vaulted chamber with excellent acoustics. Every whisper can be heard by all creatures in the chamber

A creature that knows at least one language can understand every word spoken in this room, no matter the language

Library with floor-to-ceiling shelves and no ladders. A ghostly hand (as mage hand ) retrieves books on command (50 percent chance of a Minor Treasure)

Pristine ballroom floor being swept by dozens of animated brooms

The ceiling of this observatory mirrors the current state of the sky. Several telescopes sit in the center of the room

Shadowy, illusionary dancers perform an endless ballet in a dark and dusty theater

Huge, multilevel hall with wind tunnels instead of stairs

Tiles on the walls cycle through text as if displaying an unrolling scroll; you can touch a tile to temporarily pause it, or tap it with a new scroll to change the displayed text

Room like a large-scale alchemist’s kit. Fireplaces boil cauldrons, colored liquid races through coiled tubes overhead, and acids and poisons drip into cisterns on the floor

Model planets, each large enough to stand on, orbit a burning sphere

An enchanted scriptorium. Books float to tables and animated pens copy pages

Lock: From a locked stone door protrudes a carved lion head with missing eyes. The door unlocks if cat’s eye gems are inserted.

Key: A bag containing a pair of cat’s eye gems

Lock: Arcane locked stone door inscribed with the words “Knock to enter.” The knock spell opens the door.

Key: Wand of knocking, a wand topped with a stone fist, which can cast knock once per 24 hours

Lock: Translucent stone door made of blue crystal.

Key: A translucent blue crystal key

Lock: Arcane locked door bearing a riddle. The door opens when the answer is spoken.

Key: An ancient book, Jest Book of Infinite Mirth

Heavy stone doors (DC 18 + half dungeon level Strength check to push open), inscribed with “Magic prevails where might fails.” Any magical wind or force, including mage hand , pushes open the doors

An intensely bright white dot floats in the middle of this freezing, snowy laboratory. Touching the dot deals 3 (1d6) cold damage per dungeon level

Bookcase filled with books in many languages. (Examination or DC 15 Perception check: The only book in Common, New Directions in Architecture, has no dust on the top. Pushing it opens the door)

Segment of the wall is illusory and can be passed through effortlessly. (Examination or DC 15 Perception check: a slight draft)

Trap based on the dungeon level:

level 1–2 illusory balcony trap or invisible caltrops;

3–4 lightning-blast statue or sigil trap;

5–10 bookcase trap or reverse gravity trap ;

11–16 explosive runes trap or gas vacuum trap;

17–20 floating sphere of annihilation or necromantic bridge trap

Roll 1d4 on the Obstacles table. You find the key listed in that entry. Make a note of the matching lock. The next Obstacle encountered is that lock

Tea room populated by intelligent animated objects: walking tables, talking cups, lazy sofas, and the like. They are happy to gossip about other inhabitants

Familiar carrying a message

Guard patrol (roll 1d4 on Escalations table) responding to a magical mishap, such as an escaped monster or magical fire; they accept help from anyone, even intruders

Dressing room with a vanity with attached mirror. Once per day while sitting at the vanity, anyone can cast alter self

Bedroom with a luxurious bed, a vanity covered with perfumes, and a wardrobe full of clothes. The wardrobe contains a seemingly empty silver jewelry box containing an invisible piece of jewelry. The box is magical: any object placed inside the box becomes invisible while in the box

Comfortable office shielded by a private sanctum spell, blocking teleportation, scrying, sound, and vision (50 percent chance of a Minor Treasure)

Blazing fireplace with strange forms swirling in it: a permanent portal to the Plane of Fire

Machine room containing several pulsing crystals suspended in midair, a wall covered with clacking intermeshed gears, and a brass tube emerging from the wall at head height. Up to five times each day, a creature that speaks into the tube can cast sending through the device

Guards: question intruders about their reason for being there

Level 1–2: apprentice mage with imp ; druid

Level 3–4: scout with hell hound

Level 5–10: mage with flesh guardian or ogre zombie

Level 11–16: archmage with grimalkin or water elemental

Level 17–20: archmage with chain devil or clay guardian

Guards: may attack intruders who don’t speak the right password

Level 1–2: 1d4 guards or flying swords

Level 3–4: apprentice mage with walking statue ; green hag

Level 5–10: mage with flesh guardian or any elemental

Level 11–16: mage with 2 flesh guardians or 2 chuul

Level 17–20: arcane blademaster ; 3 mages

Denizens: maintain an uneasy alliance with the local overlord (roll or choose from Set Pieces) but are on the lookout for betrayal

Level 1–2: cult fanatic

Level 3–4: 2 gargoyles

Level 5–10: 1 or 2 night hags or scorpionfolk imperators

Level 11–16: alchemist , mage , or shadow elf mage with shield guardian

Level 17–20: lich

Guards: unwillingly bound to guard a location, following the letter of their instructions

Level 1–2: 1d4 spark mephits or steam mephits

Level 5–10: ogre mage or chain devil

Level 11–16: 2 ogre mages or bone devils

Guardians: attack if approached

Level 1–2: 1d4 gear spiders or sprites

Level 3–4: bearded devil or scarecrow harvester

Level 5–10: chimera or ur-otyugh

Level 11–16: dead man’s fingers; 2 air elementals

Level 17–20: greater sphinx ; 2 guardian nagas

Guardians: attack on sight

Level 1–2: animated armor with flying sword

Level 3–4: rug of smothering with 2 animated armors

Level 5–10: elder black pudding ; 2 black puddings

Level 11–16: 2 salamanders or shambling mounds

Level 17–20: 2 guardian nagas or giant elementals

Roll 1d6 on this table to determine an encounter group. The group is nearby (in the nearest unexplored room) and may be detected by tracks, noises, flickering torchlight, or other signs

Arcane Academy. The magic school’s instructors have always educated young spellcasters responsibly—until the new chancellor arrived.

Level 1–2: doppelganger with 1 or 2 apprentice mages ; green hag with 1d6 guards

Level 3–4: mage with 1d4 guards

Level 5–10: mage or necromancer with 2 or 3 shadow demons

Level 11–16: vampire mage with giant earth elemental ; archmage with 2 or 3 elementals

Level 17–20: archmage with 1 or 2 horned devils

Setting: The luxurious office is filled with programmed illusions masquerading as the new chancellor.

Philosopher’s Stone. The laboratory’s spellcasters are dedicated to pure research—never mind that their new spells or concoctions drain life from the nearby countryside.

Level 1–2: goblin warlock or kobold sorcerer with gargoyle ; sea hag with 1d4 ice mephits

Level 3–4: merrow mage ; mage with 1d6 guards

Level 5–10: alchemist with 1 to 3 clockwork sentinels or scarecrow harvesters; mage with 2d6 animated armors

Level 11–16: alchemist or mage with 2 stone guardians or glabrezu

Level 17–20: lich with giant elemental or rakshasa

Setting: An alchemical laboratory. Any miss with an attack breaks equipment, causing an effect as if the attacker targeted the missed creature with a wand of wonder.

Summoning Gone Wrong. Fiends have killed their summoners and now threaten to wreak destruction far and wide.

Level 1–2: 2 or 3 shadows

Level 3–4: malcubus or shadow demon with 1d4 quasits

Level 5–10: cambion with 2 elementals of any type

Level 11–16: 2 or 3 horned devils

Level 17–20: balor with 2 or 3 vrocks

Setting: The floor of the room is marked with an error-ridden magic circle. A creature can use an action to fix the error with an Acana check (DC 10 + half dungeon level). After three successes, the magic circle binds fiends within it.

An archmage offers a test, such as the demonstration of a spell of each characters’ choice. In return, the archmage grants a boon, such as a scroll of the same level as the demonstrated spell, or acceptance to a spellcasters’ guild.

Scroll containing a rare version of a spell from the wizard spell list (such as amber prince’s shocking grasp)

Book of forbidden lore containing a rare version of a spell from the warlock spell list, such as Sebirus’s Imprisoning Skeletal Hands

Spell scroll containing a spell from the wizard list appropriate to the area’s tier (tier 0: cantrip or level 1 spell, tier 1: level 2–3 spell, tier 2: level 4–5 spell, tier 3: level 6–7, tier 4: level 8–9)

Rare book worth an amount appropriate to the tier (tier 0: 10 gp, tier 1: 100 gp, tier 2: 1,000 gp, tier 3: 10,000 gp, tier 4: 100,000 gp)

Rare book that imparts a (possibly false) cosmic or magical secret (such as the cosmic dangers of using psionics)

Research notes that allow a random cleric spell to be learned as a wizard spell

Research notes that include the true name of several powerful devils

Poetry or musical score containing a rare version of a spell from the bard spell list (such as Elvatar’s thunderous entrance)

Valuables: 1d4 × 100 gp worth of gold coins, jewelry, or alchemical equipment

Magic (30 percent chance): brooch of shielding or wand of the war mage +1

Valuables: 2d4 × 100 gp worth of gold coins or rare books

Magic (40 percent chance): boots of levitation or headband of intellect

Valuables: 1d6 × 1,000 gp worth of gold coins, jewelry, or powdered gems

Magic (50 percent chance): robe of eyes or wand of the war mage +2

Valuables: 1d4 × 10,000 gp worth of gold and platinum coins, jewelry, or rare books worth 1,000 gp each

Magic (60 percent chance): mantle of spell resistance or wand of lightning bolts

Valuables: 1d4 × 100,000 gp worth of platinum coins,diamonds worth 5,000 gp each, or components for making magic items

Magic (70 percent chance): robe of the archmagi or staff of striking

Wall-mounted scarab or butterfly collection

Wall-mounted diagrams of various magical circles

Bookshelves along the walls

Thick carpet (grants advantage on Stealth checks made to move silently)

Dozens of everburning candles or torches

Wall rack containing nonmagical staffs, wands, and other focuses. 50 percent of a magical wand, such as a wand of secrets , among them

Hatstand hung with flamboyant hats

Rack containing pipes and snuffboxes

A table of dusty alchemical equipment

Unlit braziers filled with coal

Scrolls in labeled vases (50 percent chance of a Minor Treasure)

Library under a permanent silence spell. Entrances bear a sign that reads “Silence!”

Wizard’s study with books on lecterns, candles inside skulls, and an empty birdcage (50 percent chance of a Minor Treasure)

A desk with locked drawers contains papers of no importance (50 percent chance of a false bottom concealing a Minor Treasure)

Pinned to the walls of this cluttered study are dozens of pictures: maps, anatomical illustrations, and sketches of renowned figures (possibly including the adventurers). The pictures are connected by a cat’s cradle of red string

Den with mounted monster heads, comfortable chairs, sherry, and stacks of books on arcane topics

Bedroom cluttered with wizard staffs, monster skulls, figurines, books, crystal balls, and the like (50 percent chance of a Minor Treasure)

A dusty bed chamber contains a bed with a rotting canopy and a wardrobe of moth-eaten clothes

Kitchen where sumptuous dishes are prepared. A locked trapdoor leads to an alcove containing vintage wines worth several hundred gold pieces

Dining room with comfortable chairs around white-clothed tables

Pantry stocked with flour and beans and hung with herbs

Cellar with a wine rack and several beer barrels

Latrine containing a book of forbidden lore. Half of its pages are torn out (50 percent chance of a Minor Treasure)

Luxurious bath with pipes that deliver heated water

Dressing room with a vanity, mirror, and wardrobe. Two unseen servants stand ready to obey any orders

Bedroom with a single canopied bed. The canopy depicts fairies sprinkling dust. The first time each day anyone lies on the bed, the bed casts the sleep spell on them

Bedroom that appears to be on fire. Bed, tables, chairs, books, and bookcases all have harmless continual flame spells cast on them

Bathtub containing toy galleys and sailing ships engaged in an endless sea battle; the vessels ram each other and fire illusory ballista bolts but do no damage. Bathrobes and soaps fill one corner of the room

Library with scrolls in latticed shelves (50 percent chance of a Minor Treasure)

Charred library; all the books’ spines are burned beyond recognition (50 percent chance of a Minor Treasure)

Library of forbidden tomes, each chained to the bookshelf (50 percent chance of a Minor Treasure)

Library of drearily cheerful children’s literature with titles such as Happy Bear’s Jolly Day, The Sunshine Bunch, and The Postman Always Leaves Cake. In fact, each book is a forbidden tome with a false cover (50 percent chance of a Minor Treasure)

Luxurious lounge containing comfortable chairs, sofas, and game boards, as well as a fully stocked bar

Common room with bookshelves, mounted trophies, and a set of shabby chairs drawn around a fireplace

The walls are pitted and black. The charred remains of practice dummies lie on the floor. Against one wall are buckets and barrels half full of rank water

Workroom with scarred wooden tables stacked with magical texts, vials of colored liquid, and strange magical instruments such as dowsing rods and distorting magnifying glasses (50 percent chance of a Minor Treasure)

Half-completed ritual circle of no obvious use

Laboratory containing alchemical equipment and bars of lead beside identically sized bars of soap, ivory, and matted hair. Notes indicate that lead-to-gold experiments have repeatedly failed

Scriptorium in which a single book is being copied a dozen times. It may be an autobiography of a local archwizard, a book of forbidden lore, or a recently discovered book of ancient knowledge (50 percent chance of a Minor Treasure)

Magnificently comfortable bedchamber. Every wall and sharp corner is padded. Doors can be locked only from the outside

Richly furnished bed chamber containing a four-poster bed, a desk, wardrobes, and a painted wooden chest (50 percent chance of a Minor Treasure)

Two beds on either side of the room. A piece of string runs down the middle of the floor. The room on one side of the string is messy

Active kitchen where all the work is done by invisible servants

Dining room with every place set. When anyone sits down, a meal appears on their plate

Dozens of taxidermied monsters in lifelike poses

Crated telescopes, alchemical glassware, and other breakables

Guardroom containing benches and tables, cards and game boards, wine jugs and plates of half-eaten food

Chapel containing a statue, an altar on a dais, and hangings bearing religious symbols

Narrow passage. Roll on Passage Contents and Exits. At its narrowest, the passage is 1d6 + 1 feet wide.

3 - 6

Passage. Roll on Passage Contents and Exits. The passage is about 10 feet wide.

Wide passage. Roll on Passage Contents and Exits. At its narrowest, the passage is 1d20 + 10 feet wide.

10 x 10 ft.

15 x 15 ft.

15 x 20 ft.

20 x 20 ft.

Large chamber. Roll on Room and Chamber Contents and Exits. For chamber size, roll 1d6:

30 x 30 ft.

30 x 40 ft.

40 x 40 ft.

40 x 50 ft.

1 - 10

Empty

Roll on Passage Scenery

Roll on Escalations

Roll on Obstacles

Empty

Roll on Novelties

Roll on Obstacles

Roll on Discoveries

Roll on Escalations and on Small or Large Cavern Scenery

Roll on Set Pieces

No Exits

One exit left

One exit straight

One exit right

Two exits, left and right

Two exits, left and straight

Two exits, straight and right

Three exits, left, straight, and right

Sloping passage down

Vertical climb down

Vertical passage descending 1d4 levels

Vertical climb up

Stone spiral staircase up

Trapdoor up

Stairs going 1d4 levels up and 1d4 levels down

Crystals or mushrooms that cast dim light cover the walls

Stalactites and stalagmites made of transparent or invisible stone fill the area

Rocks are coated with a reflective metal or algae that turns surfaces into distorted mirrors

Natural, fluted stone pillars support high ceilings, giving the area the appearance of a temple

An island sits in the middle of a lake of magma, silvery water, or ice

A grove of trees or giant mushrooms

Cavern spanned by multiple, naturally occurring stone bridges

Tiers of towers, gates, doors, statues, and stairs are carved into the sloping rock walls

A shield-sized crystal embedded in the ceiling sheds bright light throughout the area

A chasm spanned by a narrow bridge or flat-topped pillars like stepping stones

Lock: Narrow passage, 3 inches wide, carved with the words “Gates of Gathor.”

Key: A written command phrase, “Gates of Gathor, open the door,” which causes the passage to grind open to a width of 10 feet

Lock: Passage choked with petrified fungus.

Key: A nest of mouselike fungus creatures that eat petrified fungus

Tight squeeze: at its narrowest, the passage is 1d12 + 10 inches wide

Collapsed ceiling: An exit is blocked by 1d6 + 4 feet of rubble. The rubble can be excavated as if it were dirt

Chasm: The chasm is 1d20 + 10 feet wide and more than twice as deep. At the bottom may be magma, an underground river, or another dungeon level

Underwater area: The exit to an adjoining area is through a flooded passage that is 1d6 × 10 feet long. The adjoining area may be partially or fully underwater

Fast-flowing underground river: The river is 1d10 + 10 feet wide. A creature that starts its turn in the river moves 60 feet downstream. The river may lead to rapids

Magma: A 10- or 15-foot-wide stream of magma blocks the way

The key listed in entry 1 of the Obstacles table

The key listed in entry 2 of the Obstacles table

Pool of water containing 1d4 + 4 large, edible fish

Pool of glowing water fed by a dripping stalactite. Drinkers gain blindsight out to a range of 60 feet for 24 hours. The water ceases to glow and loses its potency 1 minute after being removed from the pool

1d6 fragrant mushrooms. If eaten, roll 1d4 to determine their effect. The mushrooms lose their potency 1 hour after being harvested

Cache of supplies containing useful equipment and an incomplete map

Corpse; among its possessions is a journal listing either the name of a powerful dungeon creature (see Set Pieces) or one of the treasures it guards (see Treasure Hoards)

Lone creature from a guard patrol (1 or 2 on Escalations table), not particularly loyal and willing to talk

Guard patrol (1 or 2 on Escalations table) escorting a prisoner; the prisoner offers aid or information to its rescuers

Ore vein. If mined and smelted over several weeks, the vein produces 100 pounds of metal. The type of metal varies by dungeon level:

1–2 copper,

3–4 silver,

5–10 gold,

11–16 platinum,

17–20 mithral or adamantine

Vein of gems. 1d10 gems can be collected without mining. If mined for several weeks, the vein produces a maximum of 50 more gems. The type of gem varies by dungeon level:

1–4 10 gp gem such as quartz,

5–10 100 gp gem such as garnet,

11–16 1,000 gp gem such as sapphire,

17–20 5,000 gp gem such as ruby

Guards: may attack intruders who don’t immediately show peaceful intent

Level 1–2: 1d4 goblins

Level 3–4: revilock with 1d4 grimlock technicals ; 2 ogres

Level 5–10: dread troll , ogre mage , or fire giant

Level 11–16: minotaur champion ; 2 fire giants

Level 17–20: stone giant with 2 hill giants

Guards: guarding a particular location

Level 1–2: 1 or 2 troglodytes

Level 3–4: kobold broodguard with 2d6 kobolds ; 3 or 4 bugbears

Level 5–10: shadow elf champion warrior with 2d8 shadow elf warriors ; 1d4 + 5 azers

Level 11–16: drider , shadow elf high priest , or shadow elf mage with 2 shadow elf champion warriors ; 2 driders

Level 17–20: 2 cyclops myrmidons or cloud giants

Guards: hunting

Level 1–2: 1d4 swarms of bats or swarms of rats

Level 3–4: black pudding

Level 5–10: bulette or slime mold

Level 11–16: giant grick with 3 or 4 gricks ; 2 purple worms

Level 17–20: mutant rust monster and supermutant rust monster

Guardians: in lair

Level 1–2: 1d4 giant bats or giant centipedes

Level 3–4: 1 or 2 mimics or wallflowers

Level 5–10: 2 or 3 euphoria jellies or flash cubes

Level 11–16: roper with 1d6 + 6 piercers

Level 17–20: 2 cloakers

Guardians: wandering

Level 1–2: 1 or 2 gray oozes , rust monsters or violet fungi

Level 3–4: 1 or 2 cave bears or dire centipedes

Level 5–10: 2 stone sharks

Level 11–16: purple worm

Level 17–20: murmuring worm with otyugh ; 2 cloakers

Denizens: warring against, or hiding from, local overlord (roll or choose from Set Pieces)

Level 1–2: 1d4 flumphs or kobolds

Level 3–4: priest with 1d4 deep dwarf soldiers , deep gnome scouts , or scouts

Level 5–10: 1 or 2 xorn

Level 11–16: 2 champion warriors with 2d10 warriors ; 2 gladiators with mage

Level 17–20: 2 fomorians

Roll 1d6 on this table to determine an encounter group. The group is nearby (in the nearest unexplored room) and may be detected by tracks, noises, flickering torchlight, or other signs

Hail the Conquering Villains. A raiding party has captured the residents of a rival settlement. They mean to exile, sacrifice, or even pit the captives against each other in gladiatorial games—and they’ll do the same to meddling adventurers.

Level 1–2: kobold broodguard with 1d4 + 4 kobolds ; bugbear with 1d4 hobgoblins

Level 3–4: bandit captain with dire wolf and 1d8 + 8 bandits

Level 5–10: shadow elf champion warrior with 20 shadow elf warriors and either shadow elf mage or high priest ; 3 salamanders with 4 azers

Level 11–16: minotaur champion with gorgon and 3 minotaurs ; storm giant with 2 frost giants and 2 ogres

Level 17–20: ancient sapphire dragon with 4 kobold broodguards and 20 kobolds ; ancient red dragon with 2 half-red dragon veterans and 20 kobolds

Setting: The chamber contains cages of prisoners. Releasing all the prisoners distracts the enemy combatants with the lowest CR, removing them from the battle.

Exile. A powerful champion was exiled from its kind. Without allies, it considers every creature to be its enemy—or its prey. It might grant a few moments of life to creatures that offer it a way to hurt the creatures that exiled it.

Level 1–2: cave ogre ; ogre

Level 3–4: hobgoblin warlord ; troll

Level 5–10: deva

Level 11–16: troll king

Level 17–20: empyrean ; ]]King Fomor]]

Setting: In other areas of the dungeon are groups of the creatures that exiled the creature (for instance, ogres in a level 1 or 2 dungeon). These creatures might join adventurers against the exile, or vice versa.

False Adventuring Party. A group appears to be humanoid adventurers. In fact, they’re monsters that prey on the caverns’ humanoid denizens. If the characters talk to other cavern inhabitants, they may hear rumors of friendly seeming creatures who suddenly change form and attack.

Level 1–2: doppelganger

Level 3–4: 2 or 3 doppelgangers

Level 5–10: 2 assassins or ogre mages

Level 11–16: 2 rakshasas

Level 17–20: vampire assassin , vampire mage , and vampire warrior ; 3 rakshasas

Setting: The cave is filled with ill-gotten treasure—some of which is not what it seems. Depending on dungeon level, the treasure may be guarded by:

A cave-in behind the party seals off the cavern complex’s entrance. There are other exits from the complex, but they lead into miles of winding, deserted Underland tunnels. On each day of travel through these tunnels, the party’s navigator must make a Nature or Survival check to find their way. Three successes, or one critical success, allows the party to escape the maze.

2d6 edible mushrooms

Glowing lichen casts bright light for 20 feet and dim light for an additional 20 feet. The lichen glows for 1 month after it’s harvested

Cultural equipment, such as deep dwarf stone of resolve

Gems worth an amount appropriate to the tier (tier 0: 10 gp, tier 1: 100 gp, tier 2: 1,000 gp, tier 3: 10,000 gp, tier 4: 100,000 gp)

1d6 vials. Roll 1d6: 3–4 potions of healing , 5–6 potions of greater healing

Mushroom-based alcoholic beverage that causes drinkers to be poisoned for 1 hour. While poisoned, drinkers can cast clairvoyance at will

Map to a valuable mineral deposit (see Discoveries 11 and 12)

Cache of 1d6 magical shadow elf weapons made of dark iron: they’re +1 weapons but they crumble in sunlight. On dungeon level 11 or higher, they’re +2 weapons instead

Valuables: 1d4 × 100 gp worth of silver and gold coins or gems

Magic (30 percent chance): gloves of swimming and climbing or vicious weapon

Valuables: 2d4 × 100 gp worth of silver and gold coins or 1d6 masterwork weapons worth 150 gp each

Magic (40 percent chance): ring of resistance or wand of enemy detection

Valuables: 1d6 × 1,000 gp worth of gold coins, gems, or metal ore

Magic (50 percent chance): ring of animal influence or wand of web

Valuables: 1d4 × 10,000 gp worth of gold and platinum coins or jewelry

Magic (60 percent chance): ring of the ram or sword of sharpness

Valuables: 1d4 × 100,000 gp worth of electrum, gold, and platinum coins and jewelry

Magic (70 percent chance): Harvest or ring of invisibility

The passage twists and turns: visibility is reduced to 10 feet

The passage climbs and drops; it is difficult terrain

The passage has a three-foot ceiling; Medium creatures must crawl

The passage is a fissure with a ceiling hundreds of feet high

The passage’s walls are wet

The passage’s walls are covered with stone spikes. A creature pushed into a wall takes 3 (1d6) piercing damage

The passage is crossed by a shallow, 10-footwide stream that emerges from and flows into narrow flooded tunnels

The passage is round and perfectly smooth. DC 13 Nature check: it may have been bored by a purple worm

The floor and ceiling are festooned with stalagmites and stalactites. The area is difficult terrain

Stalagmites, stalactites, and columns make most of the cavern difficult terrain , though there is an open space in the middle

Delicate sheets of stone hang from the ceiling like drapery

Translucent crystals cover the walls and ceiling. Crystal columns connect the roof and floor

Surfaces are covered in a delicate lattice of white crystals that resemble frost or snow

Lovely stone formations that resemble lilies grow from the floor

Walls, stalactites, and stalagmites are fluted with thin, vertical channels

Crystalline, hollow stone tubes, an inch or two thick, hang from the ceiling

Stalactites of vivid blue, green, and yellow hang from the ceiling

The cave features a bubbling, geothermal pool. Once per day, a creature can bathe in the pool during a short rest to recover 1 level of fatigue

A waterfall spills from a hole in the wall or ceiling to feed a subterranean lagoon

A perfectly still pool is disturbed every few minutes by a drop of water from a stalactite

The floor and ceiling are festooned with stalagmites and stalactites. The area is difficult terrain

Purple worm skeleton

Sharp, translucent crystals cover the walls and ceiling. The floor is difficult terrain . Foot-wide crystal bridges crisscross the cavern

Lovely stone formations that resemble lilies grow from the floor

The cavern features a wide, still lake. Stone pedestals serve as stepping stones

Waterfalls spill from the wall or ceiling, feeding a lake or river

Stone pillars rise from a lake to support the cavern’s high, arched ceiling

A river meanders down the center of the cavern before draining into a vertical shaft

A steaming lake surrounds an island. A creature that begins its turn in the lake or enters it for the first time on a turn takes 5 (1d10) fire damage

Craggy islands dot the surface of a vast, underground lake

The room’s exits can be reached only by climbing the cavern walls

The cavern is composed of two chambers connected by a narrow opening

Vehicle

Size

AC

Hit Points

Speed

Crew

Cost

Supply

Special

Submarine

12

Narrow passage. Roll on Passage Conetns and Exist. For passage width, roll 1d6:

2 - 7

Passage. 10 feet wide. Roll on Passage Contents and Exits.

Wide passage. Roll on Passage Contents and Exits. For passage width, roll 1d4:

15 ft.

20 ft.

30 ft.

15 x 15 ft.

15 x 20 ft.

20 x 20 ft.

20 x 30 ft.

Large chamber. Roll on Room and Chamber Contents and Exits. For chamber size, roll 1d6:

30 x 30 ft.

30 x 40 ft.

40 x 40 ft.

50 x 50 ft.

1 - 10

Empty

Roll on Passage Scenery

Roll on Escalations

Roll on Obstacles

Empty

Roll on Novelties

Roll on Obstacles

Roll on Discoveries

Roll on Escalations and on Small Room Scenery or Large Chamber Scenery

Roll on Set Pieces

No Exits

One exit left

One exit straight

One exit right

Two exits, left and right

Two exits, left and straight

Two exits, straight and right

Three exits, left, straight, and right

Stairs. Roll 1d8 to determine stair type. Then roll again on this table for other exits

Stone stairs down

Stone spiral staircase down

Trapdoor down (50 percent chance concealed under rug or furniture)

Ladder up or down (50 percent chance each)

Stone spiral staircase up

Trapdoor up

Stairs going 1d4 levels up and 1d4 levels down

Cannon; nearby are cannonballs and barrels of powder

Magic wall map of the area around the stronghold, identifying the locations of any non-hidden creatures

Arched bridge leading to an iron door halfway up a wall

Immense, monstrous statues on either side of a door

Drawbridge made of wall of force

Miniature model of this fortress, populated by tiny illusions of its inhabitants

Beast heads mounted on the wall; although bodiless, they are alive and can bite

A marble table around which sit the spirits of dead warriors re-enacting an ancient feast

Hundreds of life-sized, sculpted warriors standing in battle array

A war banner 20 or 30 feet on a side

Portrait gallery; each portrait enchanted with a permanent magic mouth

Narrow shafts that carry sound; perfect for eavesdropping or communicating between distant chambers

Lock: A door that demands today’s password.

Key: A list of passwords, each next to a day of the week

Lock: A door bearing a family crest.

Key: A key bearing the crest

Lock: A door with an indentation in the shape of a gauntlet.

Key: A gold-plated gauntlet

Lock: A door with an indentation in the shape of a gauntlet.

Key: A gold-plated gauntlet