Armor Class 16
Hit Points 135 (18d8 + 54)
Speed 30 ft.
Saving Throws CON +6, WIS +7
Skills Arcana +5, Perception +7, Religion +5
Senses passive Perception 17
Languages Common, Primordial
Challenge 8
Multiattack. The cultist makes three attacks, using Elemental Flail or Elemental Claw in any combination.
Elemental Flail. m +7, reach 5 ft. Hit: 25 (6d6 + 4) damage of a type chosen by the cultist: Acid, Cold, Fire, Lightning, or Thunder.
Elemental Claw. r +7, range 120 ft. Hit: 22 (4d10) damage of a type chosen by the cultist: Acid, Cold, Fire, Lightning, or Thunder. If the target is a Medium or smaller creature, the cultist moves the target up to 10 feet straight toward or away from itself.
Elemental Absorption (1/Day). The cultist takes Acid, Cold, Fire, Lightning, or Thunder damage. The cultist gives itself Resistance to that instance of damage and gains 10 Temporary Hit Points.
Monster Manual (2024), p. 87