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

Maddening Invigoration. When Vholap's Devout reduces a creature to 0 hit points, it regains HP equal to the creature's Wisdom modifier.

Spellcasting. The fanatic is a 4th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 11, +3 to hit with spell attacks). The fanatic has the following cleric spells prepared:

Cantrips (at will): light, sacred flame, thaumaturgy

1st level (4 slots): command, inflict wounds, shield of faith

2nd level (3 slots): hold person, spiritual weapon

Multiattack. The fanatic makes one dagger attack and one gibbering appendage attack.

Dagger. Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 20/60 ft., one creature. Hit: 4 (1d4 + 2) piercing damage.

Gibbering Appendage. Melee Attack: +4 to hit, reach 10 ft., one creature. Hit: 5 (1d6 + 2) psychic damage. And must succeed on a DC 14 Wisdom saving throw or be Frightened until the end of Vholap's Devout's turn.