Unexplained Disappearance 
Instant
Return target creature to its owner's hand. Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL