Reaper’s Scythe

Weapon (scythe), very rare (requires attunement)

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You gain a +1 bonus to attack and damage rolls made with this magic weapon. All damage dealt by this weapon is necrotic damage. While attuned to this weapon, you can use a bonus action to target a creature you can see within 60 feet. You learn the creature’s current hit points and hit point maximum.

The scythe has 3 charges. While wielding this weapon, you can use your action to expend 1 charge to target a creature within 60 feet of you that is below half of its hit point maximum and force it to succeed on a DC 15 Constitution saving throw or take 33 (6d10) necrotic damage. This ability has no effect on undead or constructs.

The scythe can only regain expended charges from a grim spirit, which will typically ask a favor in exchange for this service.