Dark Sage

You may cast Dark Sage from your library. As an additional cost to cast Dark Sage, win the coin flip of a Time Wizard you control, then sacrifice a Dark Magician. Dark Sage can't be cast except by paying its additional costs. Dark Sage can't enter the battlefield unless it was cast by paying its additional costs at least once this game. When Dark Sage enters the battlefield, search your library for an instant or sorcery card, reveal it, and put that card into your hand. Then shuffle your library.