Scythe Golem

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.

Meld into Iron. The golem can pass through solid iron as though it were difficult terrain.

Cold Iron. The golem's body is entirely made out of cold iron.

Actions
Multiattack. The golem makes 3 scythe attacks.

Scythe. Melee Weapon Attack: +8 to hit, reach 5 ft, one target. Hit: (18) 3d8 + 5 slashing damage. + (7) 2d6 damage to fiends and fey.