Jeskai Baller is a rare Creature — Human Athlete card from Mystery Booster 2 (MB2), collector number 517. Current market price: $0.17, TCGplayer market prices via Scryfall.
When you cast this spell, create a 1/1 white Athlete creature token. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)