Legendary Resistance (3/Day). If the specter fails a saving throw, it can choose to succeed instead.

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

Multiattack. The specter uses Mournful Keening if available, then makes one Hooves attack and one Reaping Scythe attack.

Hooves. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit:16 (3d6 + 6) bludgeoning damage plus 28 (8d6) necrotic damage. If the target is a Medium or smaller creature, it must succeed on a DC 18 Strength saving throw or have the prone condition.

Mournful Keening (Recharge). The specter utters a keening wail, calling to those close to death. Each non-Undead creature within 120 feet of the specter must make a DC 15 Constitution saving throw. On a failure, the creature hears the wail and is marked for death.

A creature marked for death can't regain hit points, has disadvantage on death saving throws, and all attack rolls against it are made with advantage. This effect lasts for 1 minute or until the creature is targeted by a remove curse spell or similar magic.

Reaping Scythe. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit:12 (1d12 + 6) slashing damage plus 28 (8d6) necrotic damage. If the target is a creature, it must succeed on a DC 15 Constitution saving throw or gain a level of exhaustion.