Berserk. Whenever the Abomination starts its turn with 40 hit points or fewer, roll a d6. On a 6, the golem goes berserk. On each of its turns while berserk, the Abomination attacks the nearest creature it can see. If no creature is near enough to move to and attack, the Abomination attacks an object, with a preference for an object smaller than itself. Once the Abomination goes berserk, it continues to do so until it is destroyed or regains all its hit points.

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

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

Great Sword. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 7 (2d6 + 4) slashing damage.