If the defending player controls any planeswalkers, is the protector of any battles, or the game allows the active player to attack multiple other players, the active player announces which player, planeswalker, or battle each of the chosen creatures is attacking.
September 30, 2011 · Innistrad
If the defending player controls any planeswalkers, or the game allows the active player to attack multiple other players, the active player announces which player or planeswalker each of the chosen creatures is attacking.
June 17, 2011 · Commander 2011
If the defending player controls any planeswalkers, or the game allows the active player to
February 4, 2011 · Mirrodin Besieged
If the defending player controls any planeswalkers, or the game allows the active player to attack multiple other players, the active player announces which player or planeswalker each of the chosen creatures is attacking.
October 1, 2010 · Scars of Mirrodin
If the defending player controls any planeswalkers, or the game allows the active player to
February 1, 2010 · Worldwake
If the defending player controls any planeswalkers, or the game allows the active player to attack multiple other players, the active player announces which player or planeswalker each of the chosen creatures is attacking.