Richard Garfield, Ph.D. is a rare Legendary Creature — Human Designer card from The List (Unfinity Foil Edition) (ULST), collector number 17. Current market price: — (foil $0.74), TCGplayer market prices via Scryfall.
You may play cards as though they were other cards of your choice with the same mana cost. You can't choose the same card twice. (Mana cost includes color.)