Epic Experiment
Epic Experiment {X}{U}{R}
Sorcery
Exile the top X cards of your library. For each instant and sorcery card with converted mana cost X or less among them, you may cast that card without paying its mana cost. Then put all cards exiled this way that weren't cast into your graveyard.
Latest set: [RTR] Return to Ravnica ( M · #159 )