Molten lava, spikes and diagonal lines that create the foreground, make the whole composition look tremendously powerful for me. The vertical, blurred spikes in the background allow to keep the balance of this glowering scenery. I like your work al lot!
Nice use of contrast with that yellow. It's well done, though I feel it's a bit left-heavy. Something small to draw a bit of weight to the left would give it a bit more balance. But it is very nicely done.