Falkenrath Marauders is a rare Creature — Vampire Warrior card from Innistrad (ISD), collector number 141. Current market price: $0.26 (foil $0.58), TCGplayer market prices via Scryfall.
Flying Haste (This creature can attack and {T} as soon as it comes under your control.) Whenever this creature deals combat damage to a player, put two +1/+1 counters on it.