AC 13 (natural armor)
HP 45 (6d10 + 12; bloodied 22)
Speed 20 ft., swim 40 ft.
Proficiency +2; Maneuver DC 14
Senses passive Perception 11
Languages —
Hold Breath. The plesiosaurus can hold its breath for 1 hour.
ACTIONS
Bite. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage. The target makes a DC 14 Strength saving throw . On a failure, it is pulled up to 5 feet towards the plesiosaurus.
Legends and Lore
With a History or Nature check, characters can learn the following:
DC 10 Dinosaurs are mighty lizards common in some warm parts of the world.
DC 15 Dinosaurs can be trained, and their eggs are worth a fortune.
A plesiosaurus is an oceangoing predator with a long neck and a wide mouth full of needle-sharp teeth. In the remote waters where it hunts, it is a feared sea monster that overturns fishing boats. It is rumored that even larger specimens hunt sharks and giant squid far below the ocean’s surface.
Predator Behavior
1 Chasing herbivores or people
2 Feasting on a kill
3 Hungry; chases and attacks on sight
4 In a cave lair filled with remains of old victims
Herbivore Behavior
1 Grazing; flees or stampedes if approached
2 With an egg or baby; defends it fiercely
3 Charges any who approach
4 Migrating to new grazing lands
5 Stuck in a tar pit or bog
6 Wearing a saddle
1 Half-devoured corpse of a large herbivore dinosaur
2 Huge reptilian footprints
3 Distant thumps, like a giant’s footsteps
4 A distant trumpeting roar
5 A giant mound of excrement
6 Trees snapped by immense force. DC 12 Survival check: Nearby dinosaur tracks
Dinosaurs still exist on remote islands and plateaus and in hot climates.
CR 0–2 Plesiosaurus ; 1 to 3 pteranodons ; 1 or 2 raptors
CR 3–4 Allosaurus ; ankylosaurus ; 3 or 4 raptors
CR 5–10 2 or 3 allosauruses ; diplodocus ; 1 or 2 triceratops ; tyrannosaurus rex
CR 11–15 4 or 5 ankylosauruses ; 2 diplodocuses ; 3 triceratops
Beasts are natural animals whose existence and abilities are nonmagical. A bear and a tyrannosaurus rex are both beasts.