Chrome Mox | Magic: The Gathering
Formats Chrome Mox is Legal in
Official Oracle Text for Chrome Mox
: Add one mana of any of the exiled card's colors to your mana pool.
Official Rulings for Chrome Mox
12/1/2004 : If you imprinted a multicolored card, you choose one of that card's colors each time the Mox's ability resolves.