Planeswalker

Planeswalkers are among the most powerful beings in the multiverse, and are the thematic identities of the players of the game. Planeswalkers can be born at random in any sapient species, with no outward signs of their latent power. However, there is an incredibly remote chance that any given sentient, natural being will be born with a planeswalker's spark. When that being is put through a period of extreme stress—in many cases death—the spark can trigger, causing the individual to ascend and become a planeswalker. Within the game, each player is supposed to be a planeswalker, which is a point emphasized in the current marketing strategy (for example the intro packs' description refers to your opponents as such). This concept originated from the Alpha rule book.