Traveler Tales: Mechanics
Sell:
, Exile this card from your graveyard: Create a colorless Gold artifact token with "Sacrifice this artifact: Add one mana of any color.". Sell only as sorcery.
Used on 1 cards:
Gleaming Unicorn

Enables four color play by fixing your mana base without enabling a goodstuff deck in limited since you will run out of gold.
In card text or details pages, write the mechanic's code name (playtest name) between square brackets, like "[Crittercast]", "[Bushido 1]" or "[Delay 4 {2}{R}{R}]". It will be expanded to the mechanic's name plus reminder text, such as "Suspend 4 – . (Rather than cast this spell from your hand,...)"
To expand a mechanic's name but not its reminder text, include parentheses at the end of the square brackets: "[Crittercast()]", "[Delay 9 {R}()]".