Nazgûl Battle-Mace is a rare Artifact — Equipment card from Tales of Middle-earth Commander (LTC), collector number 510. Current market price: $19.07 (foil $14.52), TCGplayer market prices via Scryfall.
Equipped creature has menace, deathtouch, annihilator 1, and "Whenever an opponent sacrifices a nontoken permanent, put that card onto the battlefield under your control unless that player pays 3 life." (Whenever a creature with annihilator 1 attacks, defending player sacrifices a permanent of their choice.) Equip {3}