Adamantine Chassis. The golem deals double damage to objects and takes normal damage from critical hits.

Elemental Absorption. Whenever the golem is subjected to acid, cold, fire, lighting, or poison damage, it takes no damage and instead regains a number of hit points equal to the damage dealt.

Immutable Form. The golem is immune to any spell or effect that would alter its form.

Limited Spell Immunity. The golem automatically succeeds on saving throws against spells of 7th level or lower, and the attack rolls of such spells always miss it.

Magic Resistance. The golem has advantage on saving throws against spells and other magical effects.

Magic Weapons. The golem's weapon attacks are magical.

Unusual Nature. The golem doesn’t require air, food, drink, or sleep.

Multiattack. The golem makes three slam attacks and uses its stomp.

Slam. Melee Weapon Attack: +16 to hit, reach 5 ft., one target. Hit: 26 (4d8 + 8) bludgeoning damage.

Stomp. The golem stomps one of its feet, releasing a shockwave that shatters the ground around it. Any creature within 100 feet of the golem must make a DC 23 Dexterity saving throw. On a failed save, the creature takes 33 (6d10) bludgeoning damage and falls prone. On a successful save, the creature takes half that damage and does not fall prone. Creatures within 20 feet of the golem take double damage from this attack.

Structures, as well as nonmagical objects that are neither being worn nor carried, take the same amount of damage without a save.