Undying Loyalty. Whenever a humanoid ally of Altomere dies within 120 feet of him while he is not incapacitated, it rises again as a zombie in its place at the start of its next turn.

Unbreaking Resolve. At the start of his turn, Altomere gains 5 temporary hit points.

Dark Power. Attacks Altomere makes against any target in dim light or darkness critically hit on a roll of 18-20.

Multiattack. Altomere makes two attacks with Sunder.

Sunder (+1 longsword). Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) slashing damage, or 10 (1d10 + 5) if used with two hands, plus 7 (2d6) necrotic damage. When Sunder critically strikes a creature, that creature becomes cursed and takes 4 (1d8) necrotic damage at the end of each turn and must succeed a DC 15 Constitution saving throw or have its maximum health reduced by half the amount of damage dealt. This effect lasts until the target receives magical healing or is the target of a remove curse spell. The creature that removes this effect from another creature must succeed a DC 15 Constitution saving throw or become affected by it, the saving throw is made with disadvantage if it is ended using magical healing.

Repel Life. Melee Spell Attack: +7 to hit, reach 15 ft., one creature that is neither undead nor construct. Hit: 9 (2d8) necrotic damage and the target must succeed a DC 15 Constitution saving throw or it is pushed 15 feet away, and knocked prone. If it fails this saving throw by 5 or more it also gains a level of exhaustion.

Chilling Grasp. Ranged Spell Attack: +7 to hit, range 120 ft., one creature. Hit: 9 (2d8) necrotic damage, the target cannot regain hit points until the start of Altomere’s next turn, and it is pulled 10 feet towards him.

Unnatural Power. When one of Altomere's allies within 120 feet hits a target with a melee attack, he can force the target of the attack to make a DC 15 Strength saving throw, taking 9 (2d8) force damage and being pushed 25 feet away from the ally on a failure. On a success, the target takes half as much damage and is not pushed.

Counter Attack. When Altomere's temporary hit points are reduced to 0 by a target within 5 feet, he can make an attack with Sunder against the target. If this attack hits, the target is knocked prone.

VILLAIN ACTIONS: 

1. Harbinger of Retribution. Altomere makes one attack with advantage. If it hits, the target takes double damage from Altomere's undead allies until he loses concentration (as if concentrating on a spell).

2. Redeploy. Altomere summons 3 (1d4 + 1) specters plus one for each humanoid ally that has died since initiative was rolled. Specters appear in spaces within 30 feet of him.

3. Damnation. All creatures of Altomere’s choice within 10 feet of him or one of his allies must make a DC 15 Constitution saving throw, taking 18 (4d8) necrotic damage and gaining a level of exhaustion on a failure. A creature that succeeds this save takes half as much damage and no exhaustion. Altomere can choose one creature that failed the saving throw to repeat it at the start of its next turn, suffering the same effects again.