Harmonized Crescendo
Instant
Oracle Text
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for
or one mana of that creature's color.)
Choose a creature type. Draw a card for each permanent you control of that type.
Rules for this card
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A keyword ability that lets you tap creatures rather than pay mana to cast a spell. See rule 702.51, “Convoke.”
Rulings (5)
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Wizards of the CoastTapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.
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Wizards of the CoastYou can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.
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Wizards of the CoastYou choose the creature type as Harmonized Crescendo resolves. Once Harmonized Crescendo starts to resolve, players can't respond to the choice or take any actions until Harmonized Crescendo finishes resolving.
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Wizards of the CoastWhen calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.
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Wizards of the CoastIf a creature you control has a mana ability with
in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.