Oathbreaker: The Newest Official MTG Format.
Magic: The Gathering has recognized a new multiplayer format called Oathbreaker, which accommodates 3-5 players and was invented by a Minnesota-based group called Weirdcards Charitable Club. To create an Oathbreaker deck, players must assemble a 60-card deck and build it around their favorite planeswalker. The format could significantly expand the appeal of the game for casual groups. No official products have been announced to support the Oathbreaker format yet.