Foggy Nelson, On Retainer is a uncommon Legendary Creature — Human Advisor card from Marvel Super Heroes Commander (MSC), collector number 594. Current market price: $0.25 (foil $0.75), TCGplayer market prices via Scryfall.
Flash When Foggy Nelson enters, put a +1/+1 counter on another target creature you control. It gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)