
This artifact enters tapped.
: Choose a color of a card in your graveyard. Add one mana of that color.
It is all too easy to disturb the Blessed Sleep.
Illustrated by Bastien L. Deharme · Shadows over Innistrad · #253
2016-04-08
Colorless cards have no color, so you can't add {C} this way.
2016-04-08
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.