Duskmantle Prowler is a uncommon Creature — Vampire Rogue card from Magic 2013 (M13), collector number 91. Current market price: $0.15 (foil $0.54), TCGplayer market prices via Scryfall.
Haste (This creature can attack and {T} as soon as it comes under your control.) Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)