Monument of War

Prerequisite: Display of Heroism feat, proficient in Athletics and History, character level 7th

Features

Hit Dice: 1d12 per monument of war level.
Hit Points: 1d12 (or 7) + your Constitution modifier per monument of war level.

Instant Boot Camp (1st level). As a bonus action you can shout directions you recall from your own military training. You and each ally who can see or hear you becomes proficient in Athletics and proficient in all simple and martial weapons for the next minute. You and each of those allies can immediately stand up or drop prone , then walk 10 feet or crawl 5 feet.

Fearless Mien (1st level). Accounts of your heroism carry their own strength. You and allies within 30 feet of you have advantage on saving throws against being frightened . When you use your Display of Heroism, each ally you affect can spend and roll one hit die, and heal that many hit points. If they were at 0 hit points, they instead heal that much plus 1.

Shell Shock (1st level). As an action you can call upon a powerful memory of being caught in an artillery barrage to conjure psychic manifestations of a cannon strike in your immediate vicinity. This manifestation must be centered on a space no more than 10 feet away, and strikes in a 15-foot-radius burst. Thus you must be caught in your own  remembered blast, though perhaps cover might shield you. Targets in the area take 7d6 points of force damage, and are pushed 5 feet and knocked prone . A successful Dexterity save (DC 8 + your proficiency modifier + your Constitution modifier) halves the blast is filled with dust and smoke, providing concealment until the end of your next turn.

After using this power, you cannot use it again until you take a short or long rest .

Do You Want to Live Forever? (2nd level). You have survived bullet hells or arrow tempests where the crossfire should have killed anyone, and that story is so well-known and powerful that it protects you. When you have no physical cover or concealment , you gain the benefit of cover against non-melee attacks.

Remembrance of the Heroic Sacrifice (2nd level). You can call upon the psychic memory of a long-dead friend to save an ally from an attack. When an attack is about to hit you or an ally, you can conjure the psychic manifestation, who is struck by the attack instead of the original target. The manifestation is instantly destroyed, but the original target of the attack is unaffected by it.

After you use this ability, you cannot use it again until you complete a short or long rest .

Cannon Overture (3rd level). When you use your shell shock ability, on the following two rounds you may as a bonus action call in additional artillery strikes. These strikes do not need to include you in their area of effect, but each one must land at least 30 feet from the center point of any other previous strike.