Beast, Erudite Aerialist is a uncommon Legendary Creature — Mutant Scientist Hero card from Marvel Super Heroes (MSH), collector number 206. Current market price: $0.16 (foil $0.34), TCGplayer market prices via Scryfall.
As long as you've put one or more +1/+1 counters on Beast this turn, he has flying. Whenever Beast deals combat damage to a player, draw a card.