Cathasach Restat (Zombie)

Undead Fortitude. If damage reduces Cathasach to 0 hit points, he must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, Cathasach drops to 1 hit point instead.

Vengeful Curse. If Cathasach dies in his zombie form, he traps his vengeful spirit within his rapier, transforming it into a Rapier of Vengeance. His spirit and the accompanying curse on the weapon can only be removed by casting remove curse or banishment on the rapier with a successful DC 20 Arcana check. A wish spell can remove his spirit and the weapon's curse instantly.

Regal Robes. Cathasach was laid to rest under the High Hall in his Robe of Summer. While wearing this robe, Cathasach has resistance to cold damage and suffers no ill effects from the weather’s temperature extremes.

Multiattack. Cathasach can use his Vengeful Glare and make one attack with his Decaying Fist or two attacks with his Rapier.

Rapier. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d8 + 1) piercing damage.

Decaying Fist. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: +4 to hit, reach 5 ft., one target. Hit: 3 (1d4 + 1) bludgeoning damage plus 10 (3d6) necrotic damage. If the target is a creature, it must succeed on a DC 15 Constitution saving throw or be cursed and begin to decay. The cursed target can't regain hit points, and its hit point maximum decreases by 10 (3d6). For every 24 hours that elapse the target's hit point maximum decreases by 3 (1d6). If the curse reduces the target's hit point maximum to 0, the target dies, and its body falls into pieces. The curse lasts until removed by the remove curse spell or other magic.

Vengeful Glare. Cathasach targets one creature it can see within 60 feet of it. If the target can see the Cathasach, it must succeed on a DC 15 Wisdom saving throw against this magic or become paralyzed until the end of Cathasach's next turn.

Parry. Cathasach adds 2 to his AC against one melee attack that would hit him. To do so, he must see the attacker and be wielding a melee weapon.