Cultist of Chaos

Spellcasting. The cultist is a 5th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 14, +6 to hit with spell attacks). The fanatic has the following warlock spells prepared:

Cantrips (at will): Eldritch Blast,Toll the Dead,Minor Illusion

1st-3rd level (2 3rd-level spell slots):Witch Bolt,Crown of Madness,Enthrall,Fear,Hunger of Hadar

Spell Attack. Casts one of it's spell attacks. 

Maddening Chaotic Hex. When a creature is effected by the cultist hex spell, as a bonus action the elder can deal 1d6 psychic damage to the creature as long as the creature is within 30 feet and can be seen by the cultist. The target must then make a DC 5 Wisdom saving throw with advantage. On a fail, the target takes a random type of damage of 1d6. On a success, the hex ends. 

Chaos Dagger. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or +2 to hit, range 20/60 ft., one creature. Hit: 4 (1d4 + 2) piercing damage. They must make a DC 10 WIS save on a hit, or take 1d4 psychic damage. 

Chaotic Hex. (1 a day) Upon being attack, the cultist casts Hex.

 Upon reaching 0 HP, the target is reborn with 1 HP Chaos elemental with Initiative 0.