WoW... I couldn't breath for several seconds when I saw it first. This picture is really stunning, surely my favourite from yours!
The epicness of this is wonderfully done, you can feel the anger of the two wolves. How you drew the fire is awsome, I wish I could do the same, so neat, nice, and dynamic. The change of the colours adds even more movements. The "simple" background is nice too, it lets us focus even more on the characters and fire. Hey hey, I love the little rocks on the floor!
Now about the characters. Their poses are very well thought, the perspectives and proportions well done. The only thing I've noticed is that the right back paw of Stormy is bigger than his front paws... But well, it doesn't really matter. The shadding is unique, with lighter colors to highlight and give more shape and deepness. Very great. I also love the fangs and the two wolves' expressions.
Now I really must start out by saying this image is fabulous. Really really strong concept, the composition is beautifully constructed especially with all the wisps of fire, I love all of the detail in the shading and in the background. The detail is honestly what brings all of this together. It's very powerful, almost tangible.
However, one of the things that is really bothering me is the broad anatomy here. Now, anatomy is my strongest artistic pursuit, so I may be a little biased about it, but I can't help but feel like both of these wolves have very large heads and very small bodies. One of the most recognizable trait of wolves is their overall body proportion in that they are longer in the body than they are tall. I just don't get that feeling here, that the bodies are long enough. Even with the awkward perspective and the weird limb positions screwing up one's ability to proper asses the lengths of things, they simply seem too short.
This is likely due to the fact that neither wolf has much of an abdomen. You can see a little bit of it on Stormy on the left side there but it just doesn't feel like enough. Kazera on the right has absolutely no visible abdomen. She almost appears to be a chest with legs and a tail attached, you know? Wolves actually have long, kind of deep chests that favor more of an oval shape than a circular one. So that's something that should be watched in the future.
I think all of this was caused by the funky perspective. The attempt at perspective is nice, I love the drama and sense of movement such perspective creates. But it could use some work. The parts of Kazera's body (in particular) nearest to the viewer are proportionately no larger or smaller than the ones farther away. Even though her rump is suggested to be dramatically closer to us, her hind paws are the exact same size as her forepaws, which are the exact same size as Stormy's paws. All of this creates a very confusing and very flat sense of space in the image. So, next time, I suggest you try to really push the distortion of a body in perspective. Whatever is closer to the viewer should be leaps and bounds larger than anything further away: rear ends, paws, tails, heads, noses, whatever. Whatever the image calls for, try to exaggerate a bit more to make things more visually clearer.
I believe I mentioned that these wolves have rather large heads. But this could be due to the "squished" look of their bodies.
All in all, I think it's a very successful image. I really didn't have much to critique. I just write a lot. I like to explain myself when I critique to be sure my thoughts are accurate and to make sure they are understood by the viewer. I hope this was helpful in some way.