Headless Iron Golem

AC: 20

Initiative: -1 (9)

HP: 150 (10d10 + 50)

Speed: 30 ft.

Immunities: fire; poison; psychic; bludgeoning, piercing, slashing from nonmagical attacks that aren't adamantine

Condition Immunities: charmed; exhaustion; frightened; paralyzed; petrified; poisoned

Senses: darkvision 120 ft., Passive Perception 10

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

CR: 10 (XP 5,900; PB +4)

Headless.

The golem is blinded and deafened, giving it disadvantage on all its attack rolls, and it can't use its Poison Breath.

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.