Cantor of the Refrain 
Creature — Human Pilot
This creature can't block. When you cast a spell for its warp cost, return this card from your graveyard to the battlefield under its owner's control. It perpetually gets +1/+0.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL