Immediately after the untap step begins, all phased-in permanents with phasing that the active player controls phase out, and all phased-out permanents that the active player controlled when they phased out phase in. This all happens simultaneously. See rule 502.1.
June 17, 2011 · Commander 2011
Immediately after the untap step begins, all phased-in permanents with phasing that the
February 4, 2011 · Mirrodin Besieged
Immediately after the untap step begins, all phased-in permanents with phasing that the active player controls phase out, and all phased-out permanents that the active player controlled when they phased out phase in. This all happens simultaneously. See rule 502.1.
October 1, 2010 · Scars of Mirrodin
Immediately after the untap step begins, all phased-in permanents with phasing that the
February 1, 2010 · Worldwake
Immediately after the untap step begins, all phased-in permanents with phasing that the active player controls phase out, and all phased-out permanents that the active player controlled when they phased out phase in. This all happens simultaneously. See rule 502.1.