Corrupted Grafstone

Artifact    (CMC:2)

Corrupted Grafstone enters the battlefield tapped. : Choose a color of a card in your graveyard. Add one mana of that color to your mana pool.

It is all too easy to disturb the Blessed Sleep. 2—3 April 2016

253 Prerelease SOI ★ ENBastien L. Deharme

™ & © 1993—2016 Wizards of the Coast

Legal in: Modern,Shadows over Innistrad Block,Legacy,Vintage,Commander

Oracle Text (click to copy):

Corrupted Grafstone {2} Artifact Corrupted Grafstone enters the battlefield tapped. {T}: Choose a color of a card in your graveyard. Add one mana of that color to your mana pool.

4/8/2016
Colorless cards have no color, so you can’t add  to your mana pool this way.
4/8/2016
Players can’t respond to mana abilities, so no player can take any action to stop you from getting the color of mana you expect to produce once you announce the ability.

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