Cogpriest of the Iron Litany

Traits

• Immutable Form. The cogpriest is immune to any spell or effect that would alter its form. Its chassis is consecrated as much as it is welded.
• Litany Engine. The cogpriest has advantage on saving throws against spells and other magical effects while its censer is lit. Dousing the censer requires a successful DC 17 Dexterity check made as an action from within 10 feet.
• Ledger of Sins. The cogpriest has recorded every judgment it has ever pronounced. It knows on sight whether a creature it has previously judged has broken the terms of that judgment, and it has advantage on attack rolls against such a creature.

Actions

• Multiattack. The cogpriest makes two Piston Gauntlet attacks and one Censer Bolt attack.
• Piston Gauntlet. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 24 (3d12 + 5) bludgeoning damage. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 24 (3d12 + 5) bludgeoning damage. The gauntlet fires on a hiss of steam and resets with an audible clack.
• Censer Bolt. Ranged Weapon Attack: +9 to hit, range 120 ft., one target. Hit: 22 (5d8) radiant damage. Ranged Spell Attack: +9 to hit, range 120 ft., one target. Hit: 22 (5d8) radiant damage. A mote of burning incense streaks from the swinging censer.
• Doctrine of Ash (Recharge 5-6). The cogpriest throws open its censer and reads judgment aloud. Each creature in the area must make a DC 17 Dexterity saving throw, taking 28 (8d6) fire damage on a failed save, or half as much damage on a successful one. Each creature in a 30-foot cone must make a DC 17 Dexterity saving throw, taking 28 (8d6) fire damage on a failed save, or half as much on a success. Unattended flammable objects in the area ignite.

Bonus Actions

• Recalibrate. Gears realign along the cogpriest’s spine. It ends one condition affecting it from the following list: blinded, deafened, or restrained, and its speed increases by 15 feet until the end of its turn.

Reactions

• Doctrinal Rebuke. Trigger: A creature within 30 feet casts a spell of 3rd level or lower. The cogpriest reads a counter-verse from its cylinder. The triggering creature must succeed on a DC 17 Constitution saving throw or the spell fails and is wasted, and the creature takes 10 (3d6) psychic damage as the doctrine is driven into its mind.

Legendary Actions

The Cogpriest of the Iron Litany can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time, and only at the end of another creature's turn. The Cogpriest of the Iron Litany regains spent legendary actions at the start of their turn.

• Censer Sweep. The cogpriest swings its censer in a low arc. Each creature within 10 feet must succeed on a DC 17 Dexterity saving throw or take 7 (2d6) fire damage.
• Cogstep. The cogpriest moves up to half its speed without provoking opportunity attacks. Its footfalls ring like a struck bell.
• Pronounce Judgment (Costs 2 Actions). The cogpriest names one creature it can see within 60 feet as guilty. That creature must succeed on a DC 17 Wisdom saving throw or have disadvantage on attack rolls against the cogpriest until the end of the cogpriest’s next turn, and the cogpriest records the judgment in its ledger.