Ugin, the Cataclysm

+3: Target permanent becomes a colorless Waste land. It keeps its converted mana cost.
-4: Gain control of all lands target player controls until end of turn. Untap them. They gain indestructible and can't be sacrificed.
-X: Gain control of X Wastes. They gain "You may pay its mana cost. If you do, exile this card then return it to the battlefield under your control."