Metamorphose. At the beginning of its turn, the aberrantis can choose which type of damage it will deal with its goo spray attack from the following: acid, necrotic, or poison.

Psychic Disarray. The mound projects a psychic field around itself that disorients all creatures affected by it. When a creature starts its turn within 30 feet of the abberantis mound it must make a DC 16 Charisma saving throw. On a failed save, a creature cannot take reactions on its next turn, and rolls 1d4 to determine what it does on its next turn.

On a 1-2 the creature doesn’t move or take actions. On a 3 it attacks a random creature, using its movement to reach the creature if able. On a 4 the creature can act and move normally. If a creature’s saving throw is successful or another effect ends it, the target is immune to the aberrantis’ psychic disarray for 24 hours.

Goo Spray. The mound exhales a poisonous gas cloud in a 15 ft. cone. Each creature in that area must make a DC 16 Constitution saving throw, taking 21 (6d6) poison damage.

Tube. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (2d6) bludgeoning damage, and the target must make a DC 14 Constitution saving throw, taking 21 (6d6) poison damage on a failed save, and are injected with metamorphite. On a successful save the target takes half damage and is not affected by the metamorphite.