Berserk. Whenever Abs starts its turn with 20 hit points or fewer, roll a d6. On a 6, Abs goes berserk. On each of its turns while berserk, Abs attacks the nearest creature it can see. If no creature is near enough to move to and attack, Abs attacks an object, with preference for an object smaller than itself. Once Abs goes berserk, it continues to do so until it is destroyed or regains all its hit points.

Abs' creator, if within 60 feet of the berserk Abs, can try to calm it by speaking firmly and persuasively. Abs must be able to hear its creator, who must take an action to make a DC 13 Charisma (Persuasion) check. If the check succeeds, Abs ceases being berserk. If it takes damage while still at 20 hit points or fewer, Abs might go berserk again.

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

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

Lightning Absorption. Whenever Abs is subjected to lightning damage, it takes no damage and instead regains a number of hit points equal to the lightning damage dealt.

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

Magic Weapons. Abs' weapon attacks are magical.

On the Lookout. Abs comfortable sharing information about what it notices. While within 5 feet of Abs, you can replace your Wisdom modifier with theirs when making Perception checks.

Sharing is Caring. Abs is comfortable sharing some food it finds with you. Every 1d6 days, Abs can find food and fresh water for themself and one other creature, provided that the land offers berries, small game, water, and so forth.

Interesting Alliance.  Abs is willing to back you up in social situations. While within 10 feet of Abs , you gain a +1 bonus on Charisma (Persuasion) checks made against creatures with the same alignment as Abs.

Multiattack. Abs makes two slam attacks.

Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage.