Cultist of Kal'anuka

Curse of the Specter. When the Cultist drops to 0 hit points it roll a d20, on a roll of 5 or lower, the Cultist becomes a Wraith.A

Dark Devotion. The Cultist has advantage on saving throws against being charmed or frightened.

Innate Spellcasting. The Cultist's spellcasting ability is Wisdom (spell save DC 15, +9 to hit with spell attacks). The Cultist can innately cast the following spells, requiring no material components:

At-will: chill touch, toll the dead, ray of frost, cause fear, false life, mage armor, shield, darkvision

3/day: dispel magic, levitate, ray of enfeeblement, ray of sickness, 

1/day: animate dead, vampiric touch

Multiattack. The fanatic makes two melee weapon attacks.

Shortsword. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: # (1d6 + #) slashing damage.

Touch (Recharge 6). Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 12 (4d6) necrotic damage and the target must make a DC 15 Constitution saving throw or suffer one level of exhaustion for the next hour.

Ray of Cold (Recharge 6). Ranged Spell Attack: +15 to hit, range 180 ft., one target. Hit: 15 (3d10) cold damage and the target must make a DC 15 Constitution saving throw or be paralyzed until the end of the cultist's next turn.