Burning Golem

Fire Absorption. Whenever the golem is subjected to fire damage, it takes no damage and instead regains a number of hit points equal to the fire damage dealt.

Regeneration. The golem regains 4d8 hit points at the start of its turn. If the golem takes cold damage exceeding its current hit points or is immersed in water, this trait doesn't function at the start of the golem's next turn. The golem dies only if it starts its turn with 0 hit points and doesn't regenerate.

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

Heated Form. A creature touches the golem, it takes 9 (2d8) fire damage. Each creature in continuous contact with the golem takes 18 (4d8) fire damage at the start of its turn. When the golem hits with any weapon, the weapon deals an extra 2d8 fire damage (included in the attack).

Magic Resistance. The golem has advantage on saving throws against spells and other magical effects.

Magic Weapons. The golem's weapon attacks are magical.

Multiattack. The golem makes two melee attacks.

Slam. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 20 (3d8 + 7) bludgeoning damage plus 9 (2d8) fire damage.

Sword. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 23 (3d10 + 7) slashing damage plus 9 (2d8) fire damage.

Steam Breath (Recharge 5-6): The golem exhales scalding steam in a 15-foot cone. Each creature in that area must make a DC 16 Constitution saving throw, taking 36 (8d8) fire damage on a failed save, or half as much damage on a successful one.