List of Magic: The Gathering Keywords - Keywords From Expert-Level Expansions (mechanics) - Phasing

Phasing introduced a new rule to the game. Cards with the status "phased out" are treated as though they do not exist except for cards that specifically interact with phased-out cards. At the beginning of each player's turn, all permanents the player controls which have phasing become "phased out", along with anything attached to the phasing cards. Any cards the player controls which were phased out become "phased in" and return to the battlefield at the same time. Phasing in or out does not tap or untap the permanent. A token that phases out ceases to exist, while anything attached to it phases out and does not phase in on the token's controller's next turn. Phasing appears in the Mirage block. The earlier cards Oubliette and Tawnos's Coffin were reworded to use phasing as well for a time; however, these errata were removed in 2007.