A face-up plane card or phenomenon card that’s turned face down becomes a new object.
January 25, 2019 · Ravnica Allegiance
A face-up plane card or phenomenon card that's turned face down becomes a new object.
February 1, 2014 · Born of the Gods
A face-up plane card or phenomenon card that’s turned face down becomes a new object.
July 1, 2012 · Magic 2013
A face-up plane card or phenomenon card that's turned face down becomes a new object.
September 30, 2011 · Innistrad
Each plane card is treated as if its text box included "When you roll {PW}, put this card on the bottom of its owner's planar deck face down, then move the top card of your planar deck off your planar deck and turn it face up." This is called the "planeswalking ability." A face-up plane card that's turned face down becomes a new object.
June 17, 2011 · Commander 2011
Each plane card is treated as if its text box included “When you roll {PW}, put this card on
May 1, 2011 · New Phyrexia
Each plane card is treated as if its text box included "When you roll {PW}, put this card on the bottom of its owner's planar deck face down, then move the top card of your planar deck off your planar deck and turn it face up." This is called the "planeswalking ability." A face-up plane card that's turned face down becomes a new object.
April 1, 2011 · Duel Decks: Knights vs. Dragons
Each plane card is treated as if its text box included "When you roll {P}, put this card on the bottom of its owner's planar deck face down, then move the top card of your planar deck off your planar deck and turn it face up." This is called the "planeswalking ability." A face-up plane card that's turned face down becomes a new object.
February 4, 2011 · Mirrodin Besieged
Each plane card is treated as if its text box included “When you roll {P}, put this card on the bottom of its owner’s planar deck face down, then move the top card of your planar deck off your planar deck and turn it face up.” This is called the “planeswalking ability.” A face-up plane card that’s turned face down becomes a new object.
October 1, 2010 · Scars of Mirrodin
Each plane card is treated as if its text box included “When you roll {P}, put this card on the
February 1, 2010 · Worldwake
Each plane card is treated as if its text box included "When you roll {P}, put this card on the bottom of its owner's planar deck face down, then move the top card of your planar deck off your planar deck and turn it face up." This is called the "planeswalking ability." A face-up plane card that's turned face down becomes a new object.