A most hideous idea, as it insults both dragon and horse. What's wrong with a Pegasus, a gryphon, a hippogriff, a giant eagle? Why not another dragon? This fills a niche which did not exist. Necessity, in this case, was not the mother of invention.
Nexus
Nexus is one of the 7 Gold Dragons that comprise Bahamut's Court. He is the court wizard, in fact. I bumped up his magic level a little more than most dragons. The Cult of the Dragon brought Tiamat back, and it is Nexus' opinion that the Cult is extremely dangerous, an example that proves...