Sorry for the late entry. I hope this will get through.
For my epic boss design i'll go with the KnD base which is dragon.
Epic boss name :
Caecius - The Fifth Ancient Dragon
Backstory :
A long time ago there were'nt only Phyrus, Notus, Boreas and Eurus. There was the fifth ancient dragon, the most ferocious one, Caecius; The despicable northeastern wind's explosive dragon. And after the fallen of the four ancient dragons, Caecius has arrived to knight's kingdom after an eternal sleep not to avenge them but to terrorize the world. He has a power of explosion due to his ability to project hidrogen (air) and fire.
He dropped
napalm scale when defeated, and can be used to craft
Armor of Caecius/Spitfire Dragongear
Artwork
Link
http://i.imgur.com/mlDRDIp.jpg
Suggested Element :
Fire/Air
WBF - GNN - GQD
In-game name :
Nas
Guild :
Middle Earth