Hmm... for the most part, I dont really like this very much. Not saying that you are a bad artist or anything, just this piece doesnt look amazing...
Firstly, you need to learn how to shade properly. It looks like you just shaded over the whole figure, not really taking into account where the light is coming from. If you are not going to use colour, you have to know how to shade very well.
Secondly, there is no real detail. It looks more like an outline than an actual person. You need to add things like facial features, creases in the clothes etc. so that it would look more realistic.
Thirdly, the fireball needs improvement. At first, I actually thought he was holding a towel or something until I realized the pose. The shape isnt really that good, and again, it needs more shading and detail.
So yeah... it was a good attempt, but it sould be improved. When you develop as an artist, so will your skills. So for now, I give you 2.5/5, but I look forward to your work in the future
