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Community Rating: 3.842 / 5 ( 38 votes ) Click here to view ratings and comments. Oracle Printed Card Name: Doubling Cube Mana Cost: Converted Mana Cost: 2 Types: Artifact Card Text: , : Double the amount of each type of unspent mana you have. : Double the amount of each type of unspent mana you have. Flavor Text: The cube's surface is pockmarked with jagged runes that seem to shift when unobserved. Expansion: Fifth Dawn Rarity: Rare All Sets: Card Number: 116 Artist: Mark Tedin Rulings Doubling Cube’s ability is a mana ability. The “type” of mana is its color, or lack thereof (if the mana is colorless). Any restrictions on the mana in your mana pool aren’t copied. For example, if you have with no restrictions on it in your mana pool and that can be used only to cast artifact spells, you’ll end up with , that can be used only to cast artifact spells, and that can be used for anything.