Those would be called "proxy" cards in mtg, and they are occasionally used in casual play. https://mtg.gamepedia.com/Proxy https://mtg.gamepedia.com/Proxy But

Those would be called "proxy" cards in mtg, and they are occasionally used in casual play. https://mtg.gamepedia.com/Proxy https://mtg.gamepedia.com/Proxy But of course the whole concept of MTG is collectible card game, buying and owning cards is core part of it