Boneyard Scourge 
Creature — Zombie Dragon
Flying
Whenever a Dragon you control dies while this card is in your graveyard, you may pay 
. If you do, return this card from your graveyard to the battlefield.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL