Shambling Mound

Large plant · CR 5

Armor Class 15

Hit Points 136 (16d10+48)

Speed swim 20 ft., 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, deafened, exhaustion

Senses blindsight60 ft. , 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.

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/Ranged Weapon Attack: +7 to hit.: 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.