Prowler, Clawed Thief is a uncommon Legendary Creature — Human Rogue Villain card from Marvel Super Heroes Commander (MSC), collector number 186. Current market price: $0.22, TCGplayer market prices via Scryfall.
Menace (This creature can't be blocked except by two or more creatures.) Whenever another Villain you control enters, Prowler connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)