Some effects replace damage dealt to one battle, creature, planeswalker, or player with the same damage dealt to another battle, creature, planeswalker, or player; such effects are called redirection effects. If one of those permanents is no longer on the battlefield when the damage would be redirected, or is no longer a battle, creature, or planeswalker when the damage would be redirected, the effect does nothing. If damage would be redirected to or from a player who has left the game, the effect does nothing.
September 30, 2011 · Innistrad
Some effects replace damage dealt to one creature, planeswalker, or player with the same damage dealt to another creature, planeswalker, or player; such effects are called redirection effects. If either creature or planeswalker is no longer on the battlefield when the damage would be redirected, or is no longer a creature or planeswalker when the damage would be redirected, the effect does nothing. If damage would be redirected to or from a player who has left the game, the effect does nothing.
June 17, 2011 · Commander 2011
Some effects replace damage dealt to one creature, planeswalker, or player with the same
February 4, 2011 · Mirrodin Besieged
Some effects replace damage dealt to one creature, planeswalker, or player with the same damage dealt to another creature, planeswalker, or player; such effects are called redirection effects. If either creature or planeswalker is no longer on the battlefield when the damage would be redirected, or is no longer a creature or planeswalker when the damage would be redirected, the effect does nothing. If damage would be redirected to or from a player who has left the game, the effect does nothing.
October 1, 2010 · Scars of Mirrodin
Some effects replace damage dealt to one creature, planeswalker, or player with the same
February 1, 2010 · Worldwake
Some effects replace damage dealt to one creature, planeswalker, or player with the same damage dealt to another creature, planeswalker, or player; such effects are called redirection effects. If either creature or planeswalker is no longer on the battlefield when the damage would be redirected, or is no longer a creature or planeswalker when the damage would be redirected, the effect does nothing. If damage would be redirected to or from a player who has left the game, the effect does nothing.