His song: Maeror Tri - Gate To Your Soul

Name: Waxartus (Wax)
Incarnation of death and decay.
It's filled with venom and no one, who touched it have survived.
Pain and agony it's favorite dishes. Plague leaks through beast's body and
flap of wings spreads it in outer world.
Character:
Sadist, loves to watch his victim's suffering.
P.S.
It isn't really a living creature, so plague does no harm to him.
No feather or fur aswell, only black armor made of unknown
flexible material, that looks like coal tar.