Xavier, Diabolic Schemer

+2: Each opponent searches their library for a non-land card. Xavier, Diabolic Schemer exiles those cards.
+1: You may cast cards exiled with Xavier, Diabolic Schemer until end of turn, and you may spend mana as though it were mana of any color.
-X: Search each player's library for a card with converted manacost X or less. Xavier, Diabolic Schemer exiles those cards.