based on D&D 5th Edition
Iron Golem
Huge  Construct , Unaligned

Armor Class 20  (natural)
Hit Points 253  (22d12+110)
Speed 30 ft. , swim 15 ft.

24  (+7) 9  (-1) 20  (+5) 3  (-4) 11  (0) 1  (-5)
Damage Immunities Bludgeoning, Fire, Piercing, Poison, Psychic, Slashing
Condition Immunities Charmed, Frightened, Paralyzed, Petrified, Poisoned, Exhausted
Senses darkvision, passive Perception 10
Languages creators
Challenge 16  (0 XP)
Magic Resistance. Has advantage on spell and magic saving throws.
Magic Weapons. Weapon attacks are magical. .
Immutable Form. Immune to spell or effect that would alter its form. Cannot squeeze..
Fire Absorption. Whenever it takes fire damage it repairs hit points based on the damage that would be dealt..
Multiattack. Makes two melee attacks
Slam. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 20 (3d8+7) bludgeoning damage.
Sword. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 23 (3d10+7) slashing damage.
Poison Breath. (Recharge 6) DC 19 Constitution saving throw, half damage on a successful save, for 45 (10d8) poison damage in 15 ft.