Gashadokuro

Armor Class 17

Hit Points 390 (20d20 + 180)

Speed 30 ft.

Initiative -2

Damage Vulnerabilities bludgeoning

Damage Immunities poison; bludgeoning, piercing, and slashing from nonmagical weapons

Condition Immunities exhaustion, poisoned

Senses darkvision 120 ft., passive Perception 9

Languages understands all languages its constituents knew in life, but can't speak

Challenge 16 (15,000 XP)

Multiattack. The gashadokuro makes three attacks.

Bite. Melee Weapon Attack: +15 to hit, reach 5 ft., one target grappled by the gashadokuro. Hit: 29 (3d12 + 10) piercing damage.

Grasp. Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 19 (2d8 + 10) bludgeoning damage. If the target is Huge or smaller, it is grappled (escape DC 23). Until this grapple ends, the target is restrained.

Slam. Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 21 (2d10 + 10) bludgeoning damage. Each creature within 20 feet of the target must make a DC 23 Dexterity saving throw. On a failed save, a creature takes 7 (2d6) bludgeoning damage and is knocked prone. If the ground in that area is loose earth or stone, it becomes difficult terrain until cleared.

Etherealness. The gashadokuro enters the Ethereal Plane from the Material Plane, or vice versa. It is visible on the Material Plane while it is in the Border Ethereal, and vice versa, yet it can't affect or be affected by anything on the other plane. When the gashadokuro appears on the Material Plane, it can make one attack with advantage as a free action.