Black Panther, Claws of Bast is a mythic Legendary Creature — Human Warrior Hero card from Marvel Super Heroes Commander (MSC), collector number 829. Current market price: $1.44 (foil $5.03), TCGplayer market prices via Scryfall.
Lifelink (Damage dealt by this creature also causes you to gain that much life.) Whenever a creature you control attacks alone, put a +1/+1 counter on it.