Praetor's Grasp 
Sorcery
Search target opponent's library for a card and exile it face down. Then that player shuffles. You may play that card for as long as it remains exiled.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL