Lighter Than Air. The golem takes no damage from falling. The golem gains disadvantage on all saving throws against spells that manipulate the air, such as gust of wind

Immutable Form. The golem is immune to any spell of 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.

Multiattack. The golem make two slam attacks

Slam. Melee Weapon Attack: +5 to hit, reach 10 ft., 5 (1d4+3) bludgeoning damage.

Rain Lift. The golem rises up to 200 ft. into the air, expelling rain underneath it. It can remain at this elevation for up to one minute, and is able to walk across the air as if it were ground. The golem can carry up to 500 lbs as part of this movement.

Cloud Cover. The golem releases a thick fog from its body in a radius of 40 ft. All other creatures within the fog are obscured. The golem is able to sense the location of other creatures within the fog