The Thing is a mythic Legendary Creature — Human Hero card from Marvel Super Heroes Commander (MSC), collector number 4. Current market price: $0.85 (foil $0.37), TCGplayer market prices via Scryfall.
Trample At the beginning of combat on your turn, if you've cast a noncreature spell this turn, put four +1/+1 counters on The Thing. Whenever The Thing attacks, you may pay {R}{G}{W}{U}. When you do, double the number of each kind of counter on any number of target permanents you control.