Humongous Marshmallow Golem

Armor Class 19

Hit Points 315 (18d20 + 126)

Speed 50 ft.

Initiative -2

Damage Vulnerabilities fire

Damage Immunities poison, psychic; bludgeoning, piercing, and slashing from nonmagical weapons that aren't adamantine

Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned

Senses darkvision 120 ft., passive Perception 10

Languages understands the languages of its creator but can't speak

Challenge 19 (22,000 XP)

Multiattack. The golem makes three slam attacks.

Slam. Melee Weapon Attack: +15 to hit, reach 5 ft., one target. Hit: 28 (3d12 + 9) bludgeoning damage. Each creature within 10 feet of the target must make a DC 23 Dexterity saving throw. On a failed save, a creature takes 9 (2d8) bludgeoning damage and is knocked prone. If the ground in that area is loose earth or stone, it becomes difficult terrain until cleared.