Iron Golem

Large construct, unaligned

Armor Class 20 (natural armor)

Hit Points 210 (20d10+100)

Speed 30ft.

Damage Immunities

• fire, poison, psychic
• bludgeoning, piercing, and slashing from nonmagical attacks that aren't adamantine

Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned

Senses darkvision 120ft., passive Perception 10

Languages understands the languages of its creator but can't speak

Challenge 16 (15,000 XP)

Traits

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 5ft., one target.
Hit: 20 (3d8+7) bludgeoning damage.

Sword

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

Poison Breath (Recharge 6)

The golem exhales poisonous gas in a 15ft 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.