Amulet of Life Thievery

While attuned to this amulet, if you drop to 0 hit points and don't die outright, the nearest creature within 30 feet of you must make a Constitution saving throw, taking 4d8 necrotic damage on a failed save, or half as much on a successful one, and you regain a number of hit points equal to the damage dealt. Once used, this property can't be used again until the next dawn.

Notes: Damage: Necrotic