Iron Golem
Large Construct, unaligned
15,000 XP
Special Abilities
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.
Immutable Form
The golem is immune to any spell or effect that would alter its form.
Magic Resistance
The golem has advantage on saving throws against spells and other magical effects.
Magic Weapons
The golem's weapon attacks are magical.
Actions
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.
Sword
Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 23 (3d10 + 7) slashing damage.
Poison Breath (Recharge 5-6)
The golem exhales poisonous gas in a 15-foot cone. Each creature in that area must make a DC 19 Constitution saving throw, taking 45 (10d8) poison damage on a failed save, or half as much damage on a successful one.
Quick Reference
Running This Encounter
The Iron Golem is a devastating melee combatant that should be positioned to maximize its Multiattack potential. Use its legendary actions to maintain pressure between turns and force the party into defensive positioning. Its immunity to most conditions and magic resistance make it difficult to control, so emphasize its raw damage output and staying power. Consider placing it in an arena or confined space where the party cannot easily kite or bypass it.
Combat Tactics
The Iron Golem charges directly at the nearest target using its full Multiattack (2 slams + 1 stomp). It prioritizes concentrating damage on a single party member to eliminate threats quickly, then moves to the next target. It stands firm and doesn't retreat, using legendary actions to attack or move whenever possible.
Environment & Setting
Place the Iron Golem in a grand hall, dungeon throne room, or ancient temple vault where its massive size (10 feet tall) is emphasized. Metal-reinforced floors and pillars should frame the battlefield without providing enough cover to trivialize the encounter.