Order Approaches

When Order Approaches enters the battlefield, you may search your library for a card named "Greymarch" reveal it, and put it in your hand.
Lands you control are Plains.
Nonland permanents you control are white. The same is true for spells you control and nonland cards you own that aren't on the battlefield.
You may spend white mana as though it were mana of any color. You may spend other mana only as though it were colorless mana.