Doubling Cube
{2}Artifact
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{3}, {T}: Double the amount of each type of unspent mana you have.
Official rulings
- Doubling Cube's ability is a mana ability. (2004-12-01)
- Any restrictions on the unspent mana aren't copied. For example, if you have {C}{W}{W}{B} with no restrictions on it and {U}{U}{U} that can be used only to cast artifact spells, you'll end up with {C}{C}{W}{W}{W}{W}{B}{B}, {U}{U}{U} that can be used only to cast artifact spells, and {U}{U}{U} that can be used for anything. (2004-12-01)
- The "type" of mana is its color, or lack thereof (if the mana is colorless). (2004-12-01)
Cards like this
Functionally similar cards by meaning — playable in Doubling Cube’s colours.
