Your Apprentice

+1: Put a basic land from your library into play. Mana it produces may only be used to cast spells exiled by Your Apprentice. Shuffle your library.
-X: Exile the top X cards of your deck. You may play these cards from exile using mana produced by lands brought into play by Your Apprentice.
-X: Put up to X cards exiled by Your Apprentice into your hand. Exile up to X lands you control and then return them to the battlefield tapped.