The Undead Dragon
The Undead Dragon is one of its kind. In the Age of Susanne he was a White Dragon and member of Lady Susanne's elite guard. When Koschei the Deathless attacked Susanne's castle the future Undead Dragon was the first to jump to her defence. Koschei used the powers he got from The Fallen, killed him and transformed into an undead.
Physical Description
Body Features
The Undead Dragon's body lost its white colour long ago. Today it is grey and rotten with holes through which bones can be seen. The condition in which his wings are should prevent him from flying, but he can fly because of the magic Koschei used on him.
Facial Features
The Undead Dragon has the thick beard of a White Dragon around the head. The rest of his face is partially rotten with bones visible through holes in the skin.
Special abilities
The Undead Dragon is the only Dragon in the world that has a breath attack. When roaring he can shoot bolts of energy from his mouth. He also has the ability to raise and command the dead.
I would love to see this expanded, but it's off to a great start! What is the nature of the breath attack, and how does it work? What is the dragon's name, and why was he selected for this magic? I'd love to hear a bit about his history, like significant battles and conflicts and political situations in which he was involved -- unless dragons in your world are not intelligent creatures, like they are in many others, in which case, probably just the battles would be cool. The idea is interesting and makes me want to read more.