Black Panther, Most Dangerous is a rare Legendary Creature — Human Warrior Hero card from Marvel Super Heroes Commander (MSC), collector number 584. Current market price: $0.38 (foil $2.21), TCGplayer market prices via Scryfall.
Whenever Black Panther is dealt damage, he deals that much damage to any other target. Power-up — {5}{W}{W}: Put two +1/+1 counters on Black Panther. Other creatures you control get +2/+2 until end of turn. (Activate each power-up ability only once. Reduce the cost by his mana cost if he entered this turn.)