Ashspawn Pixie Tormentor

Ash Split (Recharge 5-6). When reduced below half Hit Points, the tormentor splits into two Ashspawn Pixies (CR 2 each) with half its remaining Hit Points.

Aura of Dread Bloom (15 ft.). Enemies within 15 feet of the tormentor have Disadvantage on Wisdom saving throws and take 5 (1d10) Necrotic damage when they fail a saving throw.

Fractured Glamour. Illusions created by the tormentor deal 7 (2d6) Psychic damage when interacted with and impose Disadvantage on the interacting creature's next attack roll.

Multiattack. The tormentor makes two Ash Dagger attacks.

Ash Dagger. Melee Weapon Attack: +8, reach 5 ft. Hit: 7 (1d4+5) Piercing damage plus 10 (3d6) Necrotic damage.

Nightmare Pollen (Recharges 5-6). The tormentor releases a burst of dreadful ash pollen in a 20-foot radius sphere. Creatures must make a DC 15 Wisdom save or take 22 (5d8) Psychic damage and be Frightened for 1 minute. On a success, they take half damage and are not Frightened. Frightened creatures can repeat this saving throw at the end of each of their turns to end the Frightened condition.

Spellcasting. The tormentor casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 15):

At Will: Minor Illusion, Silent Image 
1/Day Each: Fear
2/Day Each: Invisibility (self only), Mirror Image , Phantasmal Force