Doubling Cube
Artifact
, 
: Double the amount of each type of unspent mana you have.
The cube's surface is pockmarked with jagged runes that seem to shift when unobserved.
イラスト：
The List#10E-321レア英語適正
裁定
2004年12月1日
Doubling Cube’s ability is a mana ability.
2004年12月1日
The “type” of mana is its color, or lack thereof (if the mana is colorless).
2004年12月1日
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.