Mardu Wastes

{t}: Add {r}{w}{b} to your mana pool.
When Mardu Wastes enters the battlefield, sacrifice 2 lands. If you cannot, remove Mardu Wastes from the game.
Whenever you add red, white, or black mana to your mana pool, you may scry 3, then draw a card. If you do, you lose 2 life.