Necromancy in the forest

Somewhere in the dark forest, Geralt has found a necromancers lair. As he approaches however, he sees a pile of bones burst from the very earth with some dark magic and start to form a full skeleton in his very eyes. This can't be good, will there be more of these? It's time to test the steel and the silver, and see if they solve this one.

A piece of fan art for the Witcher game series (of which I have had way too little time to play).
Also me experimenting various ways to create half-decent image. Here I've started with traditional tools (draft and inking) and there after worked with GIMP. 
I've actually took some notes of the process, and put them in closer detail here: fav.me/dbbzvw6
Feel free to let me know of your thoughts, as well for the final result, as to the projects. There is lot to improve, in both, I'm sure