Xalasen

Xalasen was a Dragon, spawned at an uncertain point after the First Cataclysm. Since the magics needed to create Dragons were lost countless millennia ago in the death of the Old Ones, his birth is considered to be the unnatural work of the Flesh-Angels, hence his subtle differences to the rest of the species. This means he was not technically a 'Dragon'; moreover, he was a mechanically 'printed' successor to the species, made by Flesh-Angel machinery. He was eventually killed at Gatteroth during the Battle of Light and Dark. His appearance, aside from being artificial in nature, was especially serpentine.