List of Magic: The Gathering Keywords - Keywords From Expert-Level Expansions (mechanics) - Convoke

As a spell with convoke is cast, its controller may tap any number of creatures. Each creature tapped reduces the card's mana cost by 1 colorless mana or 1 mana of the tapped creature's color. For example, a player may pay for Conclave's Blessing, which costs 3 colorless and 1 white mana, by tapping four creatures, at least one of which must be white. Convoke appears in Ravnica: City of Guilds and is the ability associated with the Selesnya Conclave.

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