Mox Opal
{0}Legendary Artifact
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Metalcraft — {T}: Add one mana of any color. Activate only if you control three or more artifacts.
Official rulings
- If you control Mox Opal and one other artifact, then have a second Mox Opal enter the battlefield as your third artifact, you can't activate either one's mana ability before putting one into your graveyard due to the “legend rule.” (2020-08-07)
Cards like this
Functionally similar cards by meaning — playable in Mox Opal’s colours.
