Voldaren Ambusher is a uncommon Creature — Vampire Archer card from Innistrad: Double Feature (DBL), collector number 166. Current market price: $0.23 (foil $0.48), TCGplayer market prices via Scryfall.
When this creature enters, if an opponent lost life this turn, it deals X damage to up to one target creature or planeswalker, where X is the number of Vampires you control.