Shambling Mound

Large, plant, unaligned

CR 5AC 15HP 136 (16d10)

Speed swim 20 ft, walk 20 ft

str: 18; (+4)
dex: 8; (-1)
con: 16; (+3)
int: 5; (-3)
wis: 10; (+0)
cha: 5; (-3)

Skills stealth +2

Damage Resistances cold, fire

Damage Immunities lightning

Condition Immunities Blinded, Blinded, Exhaustion

Senses blindsight: 60 ft. (blind beyond this radius), passive_perception: 10

Traits

Lightning Absorption. Whenever the shambling mound is subjected to lightning damage, it takes no damage and regains a number of hit points equal to the lightning damage dealt.

Actions

Multiattack. The shambling mound makes two slam attacks. If both attacks hit a Medium or smaller target, the target is grappled (escape DC 14), and the shambling mound uses its Engulf on it.

Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage.

Engulf. The shambling mound engulfs a Medium or smaller creature grappled by it. The engulfed target is blinded, restrained, and unable to breathe, and it must succeed on a DC 14 Constitution saving throw at the start of each of the mound's turns or take 13 (2d8 + 4) bludgeoning damage. If the mound moves, the engulfed target moves with it. The mound can have only one creature engulfed at a time.