Shyft

{4}{U} · Creature — Shapeshifter

At the beginning of your upkeep, you may have this creature become the color or colors of your choice. (This effect lasts indefinitely.)

Motor: se resuelve a mano

Rulings (2)

Shyft’s ability won’t let you make it colorless. Colorless is not a color.
Wizards of the Coast · 2008-10-01
The ability’s effect has no duration. Shyft will remain the chosen color or colors until the game ends, it leaves the battlefield, or some other effect (such as the next time its ability resolves) changes its colors.
Wizards of the Coast · 2008-10-01