Marvel Boy, Noh-Varr is a uncommon Legendary Creature — Kree Soldier Hero card from Marvel Super Heroes Commander (MSC), collector number 743. Current market price: $0.26 (foil $0.45), TCGplayer market prices via Scryfall.
Whenever another creature you control enters and whenever you activate a power-up ability, put a +1/+1 counter on Marvel Boy.