Gisa and Geralf is a rare Legendary Creature — Human Wizard card from Innistrad Remastered (INR), collector number 237. Current market price: $0.39 (foil $0.49), TCGplayer market prices via Scryfall.
When Gisa and Geralf enters, mill four cards. Once during each of your turns, you may cast a Zombie creature spell from your graveyard.