Scrap Metal Golem

Armor Class 18

Hit Points 210 (20d10 + 100)

Speed 30 ft.

Initiative -1

Damage Immunities acid, poison, psychic, radiant; bludgeoning, piercing, and slashing from nonmagical weapons that aren't adamantine

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

Senses blindsight 120 ft., passive Perception 10

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

Challenge 15 (13,000 XP)

Multiattack. The golem makes two slam attacks.

Slam. Melee Weapon Attack: +10 to hit, reach 5ft., one target. Hit: 19 (3d8 + 6) bludgeoning damage.

Scrap Storm. The golem releases its scrap metal, which becomes a whirling mass of metal debris. Each creature within the golem's space or 30 feet of it must make a DC 18 Dexterity saving throw, taking 45 (10d8) slashing damage on a failed save, or half as much damage on a successful one. A creature that fails this saving throw by 5 or more is knocked prone. Until the golem's next turn, its AC is reduced by 5.

Unnatural Magnetism. The golem attracts one unobstructed ferromagnetic object within 15 feet of it. If the object isn't being worn or carried, the attraction pulls it into the golem's body, giving the golem 11 (2d10) hit points for each object. If the object is being carried by a creature, the creature can make a DC 22 Strength saving throw to avoid losing the object. If the object is being worn by a creature, the creature can make a DC 18 Strength saving throw to avoid being pulled towards the golem. An object lost to the golem can be retrieved once it is dead or incapacitated.