Revenge of the Rats 
Sorcery
Create a tapped 1/1 black Rat creature token for each creature card in your graveyard.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL