Weaver

If a Weaver falls to 30hp within the first two rounds of combat, it automatically casts Mind Twist on every character within 10ft.

Multiattack. The Weaver makes three attacks: two with its claws and one with its Mind twist or Mind Sliver or three with its claws.

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft. (1d12+ 3) slashing damage. 

Mind Sliver. You drive a disorienting spike of psychic energy into the mind of one creature you can see within range. The target must make an Intelligence saving throw. Unless the saving throw is successful, the target takes 1d6 psychic damage, and the first time it makes a saving throw before the end of your next turn, it must roll a d4 and subtract the number rolled from the save.

This spell’s damage increases by 1d6 when you reach certain levels: 5th level (2d6), 11th level (3d6), and 17th level (4d6).

Mind Twist (Recharge 6). The target must succeed on a DC 15 Wisdom saving throw or have it's memories swapped with false memories. The target is paralyzed for 1 hour or until memories are restored with a restoration spell or by the death of the Weaver. (When the memory stealer dies, all of the memories of the target are restored.)

Devour Memory 1/Day. The target must succeed on a DC 20 Wisdom saving throw or cannot recall any memories they have. The target is now inanticipated for 1 hour or until memories are restored. (When the Weaver dies, all of the memories of the target are restored.)

If a Weaver falls to 30hp within the first two rounds of combat, it automatically casts Mind Twist on every character within 10ft.