ShadowMane

The undead Dragon, ShadowMane haunts the Fire Isle’s. Before the world shattered, Alpha Omega had learned of ShadowMane’s treachery, helping the Queen of the Unknow create her vile creatures of the same name. Unhappy with the Black Dragon, Alpha Omega sent his other three dragons to deal with the traitor. As a result, a great battle erupted where the Sands of Time are now.  

No longer needing him, the Queen of the Unknown abandoned him to his sibling’s vicious attacks, where they eventually killed him. However, the magic that had scarred the land, also caused him to forever live as a shadow version of his former self. He hid away under the Fire Isles until being disturbed by the Fire Isle Mages when they began to explore the islands. They enslaved him and now use him as a guardian to their secrets.