Cursed Mound

Necrotic Absorption. Whenever the shambling mound is subjected to necrotic damage, it takes no damage and regains a number of hit points equal to the necrotic 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. If the targeted creature is reduced to 0 Hit Points by any of these attacks it dies and rises from the dead as a zombie under the cursed mounds control in 1d4 turns.

Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage. If the targeted creature is reduced to 0 Hit Points by this attack it dies and rises from the dead as a zombie under the cursed mounds control in 1d4 turns.

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 two creature engulfed at a time. If the targeted creature is reduced to 0 Hit Points by this attack it dies and rises from the dead as a zombie under the cursed mounds control in 1d4 turns.

Raise Dead. The cursed mound may choose an unoccupied 5 by 5 space within 10 ft  of it and summon a ghoul that lasts for 1d6 turns. The cursed mound has 3 charges to expend during combat. Once out of charges the cursed mound may not use this ability again until 6 hours have passed.