Pay

Playing most spells and activated abilities requires paying costs; see rule 409, "Playing Spells and Activated Abilities." Declaring attackers (see rule 308, "Declare Attackers Step") and declaring blockers (see rule 309, "Declare Blockers Step") can also require paying costs. Paying mana is done by removing the indicated amount of mana from the player's mana pool. Any time a player is asked to pay mana, mana abilities may be played. Mana abilities must be played before the costs are paid. Paying life subtracts the indicated amount of life from the player's life total. A player can't pay more mana than the amount of mana in his or her mana pool or more life than his or her life total. Zero life or zero mana can always be paid, even if the player has less than zero life. Unpayable costs can't be paid. To pay any cost, the player carries out the instructions specified by the spell, ability, or effect. It's illegal to attempt paying a cost when unable to successfully follow the instructions. For example, a player can't pay a cost that requires tapping a creature if that creature is already tapped. Each payment applies to only one spell or ability. For example, a player can't sacrifice just one creature to play the activated abilities of two permanents that require sacrificing a creature as a cost. Also, the resolution of a spell or ability doesn't pay another spell or ability's cost, even if part of its effect is doing the same thing the other cost asks for.