Cultist of Ragnarok

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

Silent Magic. Spell cast by cultists of Ragnarok don't need a verbal component.

Fiery Death. If the cultist drops to 0 hit points, its body explodes. Every creature in a 10 ft. radius must make a DC 14 Dexterity saving throw, taking 3d6 fire damage on a failure and half as much on a success.

Spellcasting. The fanatic is a 5th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 13, +5 to hit with spell attacks). The fanatic has the following cleric spells prepared:

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

1st level (4 slots): alarm, bane, earth tremor, inflict wounds

2nd level (3 slots): augury, darkness, silence

3rd level (2 slots): bestow curse, erupting earth, phantom steed

Multiattack. The fanatic makes two melee attacks.

Maul. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 8 (1d12 + 2) piercing damage.

Apocalyptic Visions (Recharges after a Long Rest).  The cultist forces a creature it can see within 60 ft. to make a Wisdom saving throw (DC 13). On a failure, they become frightened for one minute.