+2: Add {C} to your mana pool for each Wastes card you control.

-3: Target creature gains Menace and Deathtouch until end of turn. If it's colorless, it also gains trample until end of turn.

-10: Search your library for up to three Wastes cards and put them onto the battlefield tapped. Then, shuffle your library. You gain 5 life for each Wastes card put onto the battlefield this way.