Gaea, The World Reborn

+1: Sacrifice a land. Search you library for a land and put it onto the battlefield. Shuffle your library.
-3: Sacrifice any number of lands. Search your library for up to that many lands and put them onto the battlefield tapped. Shuffle your library.
-5: Exile cards from your library until you reveal a land. If you do, put it onto the battlefield. If you do not reveal a land, you win the game.