A face-down permanent can’t be turned face down. If a spell or ability attempts to turn a face-down permanent face down, nothing happens and that effect doesn’t change any of its characteristics or their copiable values.
October 13, 2023 · Doctor Who
A face-down permanent can’t be turned face-down. If a spell or ability attempts to turn a face-down permanent face down, nothing happens and that effect doesn’t change any of its characteristics or their copiable values.
April 28, 2017 · Amonkhet
rule 708.2b not present in this release
September 30, 2016 · Kaladesh
If a player casts a split card with fuse from his or her hand, in addition to choosing either half as described above, the player may choose to cast both halves, resulting in a fused split spell with the combined characteristics of both halves. Only the fused split spell is evaluated to see if it can be cast.
February 1, 2014 · Born of the Gods
If a player casts a split card with fuse from his or her hand, in addition to choosing either half as described above, the player may choose to cast both halves, resulting in a fused split spell. Both halves are evaluated to see if the spell can be cast. If either half can’t be cast, then both halves can’t be cast as a single spell.
May 1, 2013 · Dragon’s Maze
If a player casts a split card with fuse from his or her hand, in addition to choosing either half as described above, the player may choose to cast both halves, resulting in a fused split spell. Both halves are evaluated to see if the spell can be cast. If either half can't be cast, then both halves can't be cast as a single spell.