If a player with priority casts a spell or activates an activated ability while another spell or ability is already on the stack, the new spell or ability has been cast or activated “in response to” the earlier spell or ability. The new spell or ability will resolve first. See rule 608, “Resolving Spells and Abilities.”
May 3, 2019 · War of the Spark
What a player actually needs to do to pay a cost may be changed or reduced by effects. If the mana component of a cost is reduced to nothing by cost reduction effects, it’s considered to be {0}. Paying a cost changed or reduced by an effect counts as paying the original cost.
January 25, 2019 · Ravnica Allegiance
What a player actually needs to do to pay a cost may be changed or reduced by effects. If the mana component of a cost is reduced to nothing by cost reduction effects, it's considered to be {0}. Paying a cost changed or reduced by an effect counts as paying the original cost.
February 1, 2014 · Born of the Gods
What a player actually needs to do to pay a cost may be changed or reduced by effects. If the mana component of a cost is reduced to nothing by cost reduction effects, it’s considered to be {0}. Paying a cost changed or reduced by an effect counts as paying the original cost.
September 30, 2011 · Innistrad
What a player actually needs to do to pay a cost may be changed or reduced by effects. If the mana component of a cost is reduced to nothing by cost reduction effects, it's considered to be {0}. Paying a cost changed or reduced by an effect counts as paying the original cost.
June 17, 2011 · Commander 2011
What a player actually needs to do to pay a cost may be changed or reduced by effects. If the
April 1, 2011 · Duel Decks: Knights vs. Dragons
What a player actually needs to do to pay a cost may be changed or reduced by effects. If the mana component of a cost is reduced to nothing by cost reduction effects, it's considered to be {0}. Paying a cost changed or reduced by an effect counts as paying the original cost.
February 4, 2011 · Mirrodin Besieged
What a player actually needs to do to pay a cost may be changed or reduced by effects. If the mana component of a cost is reduced to nothing by cost reduction effects, it’s considered to be {0}. Paying a cost changed or reduced by an effect counts as paying the original cost.
October 1, 2010 · Scars of Mirrodin
What a player actually needs to do to pay a cost may be changed or reduced by effects. If the
July 16, 2010 · Magic 2011
What a player actually needs to do to pay a cost may be changed or reduced by effects. If the mana component of a cost is reduced to nothing by cost reduction effects, it's considered to be {0}. Paying a cost changed or reduced by an effect counts as paying the original cost.
February 1, 2010 · Worldwake
If an effect says that a player can't gain life, that player can't exchange life totals with a player who has a higher life total; in that case, the exchange won't happen. In addition, a cost that involves having that player gain life can't be paid, and a replacement effect that would replace a life gain event affecting that player won't do anything.