Fehn and Vahli

First off. Great piece. It has a lot of personality about it. And spying it in the thumbnails I thought it was a really striking piece! What I love is the detail you've done around the hair and the eyes. The faces look pretty good! they are both very cool looking characters.
Now onto my critiques. The line work on the body for both characters starts to get a little sketchy as the art goes towards the bottom. I would spend time cleaning up the lines to match the great line work around the face and hair. And the cross hatching under the neck seems inconsistent with the rest of the artwork as you you don't use it much anywhere else there are shadows.
Again great stuff. Look forward to see more from you soon!