Scourge the Shadow Dragon

This is my first time custom making a model completely using Meshmixer. I made it for a friend of mine who wanted a custom dragon character for our roleplays. He sent me the Forest Dragon file as an example, and I completely reworked the model from there. It was good experience for me and I learned a whole bunch.

He describes his character thus:
Scourge is a young shadow dragon of the sword coast. He has lead legions of the undead and killed infants for gold. He has no morals and lets nothing stop him from what he wants. Almost every faction he has come across now wants him dead, but when you can breathe blue flames and fly at the speed of sound you tend not to care about lower races...