Creepy Doll

Devil's Sight. Magical darkness doesn't impede the doll's darkvision.

Inanimate. While the doll remains motionless, it is indistinguishable from an ordinary doll.

Innate Spellcasting. The doll's spellcasting ability is Charisma (spell save DC 14). It can innately cast the following spells, requiring only verbal components:

At will: suggestion

1/day each: dominate person, modify memory

Undying Evil. If the doll is destroyed, it regains all its hit points and reappears at a nearby location in 24 hours unless a remove curse spell is cast on its remains.

Giggle. The doll targets one creature it can see within 30 feet of it. The target must succeed on a DC 14 Wisdom saving throw or take 7 (2d6) psychic damage and become frightened for 1 minute. The target can repeat the saving throw at the end of each of its turns, with disadvantage if the doll is within line of sight, ending the effect on itself on a success.