Clockwork Abomination

Additional Legs. Four legs allow the clockwork abomination to climb at a speed equal to its base speed and to ignore difficult terrain.

Piston Reach. The abomination's melee attacks have a deceptively long reach thanks to the pistons powering them.

Immutable Form. The clockwork abomination is immune to any spell or effect that would alter its form.

Infernal Power Source. When a clockwork abomination falls to 0 hp, its infernal battery explodes. Creatures within 10 feet of the clockwork abomination take 14 (4d6) fire damage, or half damage with a successful DC 14 Dexterity saving throw.

Multiattack. The clockwork abomination makes one bite attack and one slam attack.

Bite. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 15 (2d8 + 6) piercing damage.

Slam. Melee Weapon Attack: +9 to hit, reach 15 ft., one target. Hit: 13 (2d6 + 6) bludgeoning damage.

Breath Weapon (Recharge 5-6). The clockwork abomination's Infernal Power Source allows it to breathe fire in a 20-foot cone. Targets in this cone take 22 (4d10) fire damage, or half damage with a successful DC 14 Dexterity saving throw.