Discolored Road

All cards lose their color and become colorless.
At the beginning of your upkeep, chose a card.
That card regains its color until end of turn.
{4}: Destroy target white creature.
{4}: Destroy target blue creature.
{4}: Destroy target black creature.
{4}: Destroy target red creature.
{4}: Destroy target green creature.
If Discolored Roads were to leave the battlefield
all cards become every color.