History of CR 508.1i
Every distinct wording since 2010, newest first.
May 3, 2019 · War of the Spark
If any of the costs require mana, the active 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 active player then has a chance to activate mana abilities (see rule 605, "Mana Abilities").
April 28, 2017 · Amonkhet
If any of the costs require mana, the active player then has a chance to activate mana abilities (see rule 605, “Mana Abilities”).
September 30, 2011 · Innistrad
Once the player has enough mana in his or her mana pool, he or she pays all costs in any order. Partial payments are not allowed.
June 17, 2011 · Commander 2011
Once the player has enough mana in his or her mana pool, he or she pays all costs in any
February 4, 2011 · Mirrodin Besieged
Once the player has enough mana in his or her mana pool, he or she pays all costs in any order. Partial payments are not allowed.
October 1, 2010 · Scars of Mirrodin
Once the player has enough mana in his or her mana pool, he or she pays all costs in any
February 1, 2010 · Worldwake
Once the player has enough mana in his or her mana pool, he or she pays all costs in any order. Partial payments are not allowed.