I beefed up the base with some green stuff for stability and added a few Hirst bricks and gravel for rubble. The broken axe was part of the sculpt, but the cracked shield and the skull (in back) were added.
Going for the whole "fire on the inside" look.
Not 100% happy with the molten sword, but it gives you the idea. The "stripes" on the wings are more molten-y goodness.