Marcus, Mutant Mayor is a rare Legendary Creature — Mutant Advisor card from Fallout (PIP), collector number 109. Current market price: $0.60 (foil $0.94), TCGplayer market prices via Scryfall.
Vigilance, trample Whenever a creature you control deals combat damage to a player, draw a card if that creature has a +1/+1 counter on it. If it doesn't, put a +1/+1 counter on it.