Boneyard Scourge

Flying
Whenever a Dragon you control dies while
Boneyard Scourge is in your graveyard, you may
pay {1}{b}. If you do, return Boneyard Scourge
from your graveyard to the battlefield.
The true ruler of the Rotten Vale, Vaal Hazak is a
dragon that dresses itself in the remains of the fallen.
A grim reminder of the finality of death.