If a player has priority for multiple stacks and casts a spell, activates an ability, or a triggered ability they control triggers, the player must specify which one of those stacks the spell or ability is put on. If an object on one of those stacks caused the triggered ability to trigger, the player must put it on that stack. If a resolving spell or ability on one of those stacks causes a player to cast a spell or create a copy of a spell, the new spell must be put on the same stack. If a spell or ability targets an object on one of those stacks, it must be put on the same stack as its target; it can’t target objects on multiple stacks.
January 25, 2019 · Ravnica Allegiance
If a player has priority for multiple stacks and casts a spell, activates an ability, or a triggered ability they control triggers, the player must specify which one of those stacks the spell or ability is put on. If an object on one of those stacks caused the triggered ability to trigger, the player must put it on that stack. If a resolving spell or ability on one of those stacks causes a player to cast a spell or create a copy of a spell, the new spell must be put on the same stack. If a spell or ability targets an object on one of those stacks, it must be put on the same stack as its target; it can't target objects on multiple stacks.
April 27, 2018 · Dominaria
If a player has priority for multiple stacks and casts a spell, activates an ability, or a triggered ability they control triggers, the player must specify which one of those stacks the spell or ability is put on. If an object on one of those stacks caused the triggered ability to trigger, the player must put it on that stack. If a resolving spell or ability on one of those stacks causes a player to cast a spell or create a copy of a spell, the new spell must be put on the same stack. If a spell or ability targets an object on one of those stacks, it must be put on the same stack as its target; it can’t target objects on multiple stacks.
February 1, 2014 · Born of the Gods
If a player has priority for multiple stacks and casts a spell, activates an ability, or a triggered ability he or she controls triggers, the player must specify which one of those stacks the spell or ability is put on. If an object on one of those stacks caused the triggered ability to trigger, the player must put it on that stack. If a resolving spell or ability on one of those stacks causes a player to cast a spell or create a copy of a spell, the new spell must be put on the same stack. If a spell or ability targets an object on one of those stacks, it must be put on the same stack as its target; it can’t target objects on multiple stacks.
September 30, 2011 · Innistrad
If a player has priority for multiple stacks and casts a spell, activates an ability, or a triggered ability he or she controls triggers, the player must specify which one of those stacks the spell or ability is put on. If an object on one of those stacks caused the triggered ability to trigger, the player must put it on that stack. If a resolving spell or ability on one of those stacks causes a player to cast a spell or create a copy of a spell, the new spell must be put on the same stack. If a spell or ability targets an object on one of those stacks, it must be put on the same stack as its target; it can't target objects on multiple stacks.
June 17, 2011 · Commander 2011
If a player has priority for multiple stacks and casts a spell, activates an ability, or a
April 1, 2011 · Duel Decks: Knights vs. Dragons
If a player has priority for multiple stacks and casts a spell, activates an ability, or a triggered ability he or she controls triggers, the player must specify which one of those stacks the spell or ability is put on. If an object on one of those stacks caused the triggered ability to trigger, the player must put it on that stack. If a resolving spell or ability on one of those stacks causes a player to cast a spell or create a copy of a spell, the new spell must be put on the same stack. If a spell or ability targets an object on one of those stacks, it must be put on the same stack as its target; it can't target objects on multiple stacks.
February 4, 2011 · Mirrodin Besieged
If a player has priority for multiple stacks and casts a spell, activates an ability, or a triggered ability he or she controls triggers, the player must specify which one of those stacks the spell or ability is put on. If an object on one of those stacks caused the triggered ability to trigger, the player must put it on that stack. If a resolving spell or ability on one of those stacks causes a player to cast a spell or create a copy of a spell, the new spell must be put on the same stack. If a spell or ability targets an object on one of those stacks, it must be put on the same stack as its target; it can’t target objects on multiple stacks.
October 1, 2010 · Scars of Mirrodin
If a player has priority for multiple stacks and casts a spell, activates an ability, or a
June 18, 2010 · Archenemy
If a player has priority for multiple stacks and casts a spell, activates an ability, or a triggered ability he or she controls triggers, the player must specify which one of those stacks the spell or ability is put on. If an object on one of those stacks caused the triggered ability to trigger, the player must put it on that stack. If a resolving spell or ability on one of those stacks causes a player to cast a spell or create a copy of a spell, the new spell must be put on the same stack. If a spell or ability targets an object on one of those stacks, it must be put on the same stack as its target; it can't target objects on multiple stacks.