Characteristic-defining abilities function everywhere, even outside the game and before the game begins. (See rule 604.3.)
July 12, 2019 · Core Set 2020
Characteristic-defining abilities function everywhere, even outside the game. (See rule 604.3.)
July 16, 2010 · Magic 2011
rule 113.6a not present in this release
February 1, 2010 · Worldwake
If an effect allows a player to "change the target(s)" of a spell or ability, each target can be changed only to another legal target. If a target can't be changed to another legal target, the original target is unchanged, even if the original target is itself illegal by then. If all the targets aren't changed to other legal targets, none of them are changed.