Crystal Seer 

Creature — Vedalken Wizard
When this creature enters, look at the top four cards of your library, then put them back in any order.
: Return this creature to its owner's hand.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL