Immobile. The tree cannot move.

Tentacle Slap. Melee Weapon Attack: +16 to hit, reach 30ft, 1 target. Hit: 10d8 + 20 bludgeoning damage + 4d8 psychic damage, and the target is grappled (escape DC24) if it is large of smaller.

Tentacle Whirl. Each creature within 30ft of the tree must make a DC21 dexterity saving throw or take 20d8 + 40 bludgeoning damage.

Psychic Blast. Each creature within 60ft of the tentacle tree must make a DC21 wisdom saving throw, taking 10d8 psychic damage and being stunned for 1 minute on a failure, or half as much damage and not being stunned on a successful save.

Life Sap. One creature grappled by the tree takes 10d8 necrotic damage and the tree regains hit points equal to the damage dealt.

Poison Prick. One creature within 60ft of the tree must succeed on a DC23 constitution saving throw or be poisoned for 10 minutes. If the target failed the saving throw by 5 or more, they are also unconcious for the duration.