Cubic Wood Golem

Susceptibility to Fire. If the golem takes fire damage, it has disadvantage on attack rolls and ability checks until the end of its next turn.

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

Radiant Absorption. Whenever the golem is subjected to radiant damage, it takes no damage and instead regains a number of hit points equal to the radiant damage dealt.

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 makes two slam attacks.

Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (2d10 + 4) bludgeoning damage.

Protective Retaliation. If the golem's master is within 5 ft. of it and a melee attack is made against it, the golem must use its reaction to attack the attacker.