I doubt you really want to do much more with the pic but here are a few more suggestions from me to really give the picture some more depth and 'tlc'
Make several backup copies of the file and/or layers and try experimenting with fading out the legs. Make the fade very gradual from the waist downwards, till you can barely see the feet. This will do several things at once, not only will mere fading on it's own give a more ghostly and ethereal appearance, but you got SO much line work and details in the legs compared to the torso, that they look almost solid. The fading will balance things out and remove that contrast. Do NOT take this to mean the detail in the legs is a bad thing, just be aware of tricks to counter unnecessary contrasting.
I will say this again, BEARD! He needs a beard, experiment with different lineworks to get the right look for him, nothing massive but he needs facial hair. That will really make who he is shine out in the picture imo. Aragorn of Lord of the Rings is a good example of the amount of facial hair you should aim for, certainly nothing that could make a dwarf jealous, but something that shows age, nobility, and wisdom.
Otherwise you really went above what I ever expect to see from a typical draw-thread when it comes to the environment. A lot of good attention to the various lighting effects in the scene just made it really shine.
Once again not the requester, just another dude who likes to draw.