Chrome Mox
Artifact
Imprint — When this artifact enters, you may exile a nonartifact, nonland card from your hand.
: Add one mana of any of the exiled card's colors.
Illustrated by
Double Masters#358MythicEnglishLegality
Rulings
If no card is imprinted on Chrome Mox, it can’t add mana to your mana pool. It can never add colorless mana to your mana pool, even if the imprinted card has a colorless mana symbol in its mana cost.
If you imprinted a multicolored card, you choose one of that card’s colors each time Chrome Mox’s ability resolves.
If you imprinted a multicolored card, you choose one of that card's colors each time you tap Chrome Mox for mana.
If no card is imprinted on Chrome Mox, it can't add mana. It can never add 
, even if the imprinted card has a colorless mana symbol in its mana cost.
If the exiled card is multicolored, you choose one of that card’s colors each time you tap this artifact for mana.
If no card is exiled with this artifact, it can’t add mana. The same is true if the exiled card is colorless.
This artifact's activated ability can never add , even if the exiled card is colorless or has a colorless mana symbol in its mana cost.