History of CR 509.1e
Every distinct wording since 2010, newest first.
May 3, 2019 · War of the Spark
If any of the costs require mana, the defending player then has a chance to activate mana abilities (see rule 605, “Mana Abilities”).
January 25, 2019 · Ravnica Allegiance
If any of the costs require mana, the defending player then has a chance to activate mana abilities (see rule 605, "Mana Abilities").
May 1, 2014 · Journey into Nyx
If any of the costs require mana, the defending player then has a chance to activate mana abilities (see rule 605, “Mana Abilities”).
September 30, 2011 · Innistrad
If any of the costs require mana, the defending player then has a chance to activate mana abilities (see rule 605, "Mana Abilities").
June 17, 2011 · Commander 2011
If any of the costs require mana, the defending player then has a chance to activate mana
April 1, 2011 · Duel Decks: Knights vs. Dragons
If any of the costs require mana, the defending player then has a chance to activate mana abilities (see rule 605, "Mana Abilities").
February 4, 2011 · Mirrodin Besieged
If any of the costs require mana, the defending player then has a chance to activate mana abilities (see rule 605, “Mana Abilities”).
October 1, 2010 · Scars of Mirrodin
If any of the costs require mana, the defending player then has a chance to activate mana
February 1, 2010 · Worldwake
If any of the costs require mana, the defending player then has a chance to activate mana abilities (see rule 605, "Mana Abilities").