If there are any optional costs to attack with the chosen creatures (expressed as costs a player may pay “as” a creature attacks), the active player chooses which, if any, they will pay.
January 25, 2019 · Ravnica Allegiance
If there are any optional costs to attack with the chosen creatures (expressed as costs a player may pay "as" a creature attacks), the active player chooses which, if any, they will pay.
April 27, 2018 · Dominaria
If there are any optional costs to attack with the chosen creatures (expressed as costs a player may pay “as” a creature attacks), the active player chooses which, if any, they will pay.
April 28, 2017 · Amonkhet
If there are any optional costs to attack with the chosen creatures (expressed as costs a player may pay “as” a creature attacks), the active player chooses which, if any, he or she will pay.
May 1, 2014 · Journey into Nyx
If any of the chosen creatures require paying costs to attack, the active player determines the total cost to attack. Costs may include paying mana, tapping permanents, sacrificing permanents, discarding cards, and so on. Once the total cost is determined, it becomes “locked in.” If effects would change the total cost after this time, ignore this change.
September 30, 2011 · Innistrad
If any of the chosen creatures require paying costs to attack, the active player determines the total cost to attack. Costs may include paying mana, tapping permanents, sacrificing permanents, discarding cards, and so on. Once the total cost is determined, it becomes "locked in." If effects would change the total cost after this time, ignore this change.
June 17, 2011 · Commander 2011
If any of the chosen creatures require paying costs to attack, the active player determines the
April 1, 2011 · Duel Decks: Knights vs. Dragons
If any of the chosen creatures require paying costs to attack, the active player determines the total cost to attack. Costs may include paying mana, tapping permanents, sacrificing permanents, discarding cards, and so on. Once the total cost is determined, it becomes "locked in." If effects would change the total cost after this time, ignore this change.
February 4, 2011 · Mirrodin Besieged
If any of the chosen creatures require paying costs to attack, the active player determines the total cost to attack. Costs may include paying mana, tapping permanents, sacrificing permanents, discarding cards, and so on. Once the total cost is determined, it becomes “locked in.” If effects would change the total cost after this time, ignore this change.
October 1, 2010 · Scars of Mirrodin
If any of the chosen creatures require paying costs to attack, the active player determines the
February 1, 2010 · Worldwake
If any of the chosen creatures require paying costs to attack, the active player determines the total cost to attack. Costs may include paying mana, tapping permanents, sacrificing permanents, discarding cards, and so on. Once the total cost is determined, it becomes "locked in." If effects would change the total cost after this time, ignore this change.