That seems like a YGO card back, not a MTG card back. A real life YGO card back has a whirlpool pattern with a dark center, and in the anime it's sometimes simplified to be a dark oval on plain background, exactly like what's seen here. A MTG card back has a (rather larger) bright oval on a dark background, with the MTG logo, the color pie, and the "Deckmaster" logo on top.