Number Crunch 
Instant
Return target permanent to its owner's hand. Gotcha — If an opponent says a number, you may say "Gotcha" When you do, return this card from your graveyard to your hand.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL