Patron of the Vein is a rare Creature — Vampire Shaman card from The Lost Caverns of Ixalan Commander (LCC), collector number 207. Current market price: $0.31, TCGplayer market prices via Scryfall.
Flying When this creature enters, destroy target creature an opponent controls. Whenever a creature an opponent controls dies, exile it and put a +1/+1 counter on each Vampire you control.