Thinking it would be best to finish the rest of the drawing and add paint last, to avoid any smudging or smearing or anything like that. Just not sure, seems like I'm starved of ideas for what to add to the rest of the foreground, let alone the background. But I'm sure I'll think of something. Maybe flaming skulls/skeletons for the foreground, perhaps?
Ratcaller
If youre not sure, let it rest for a bit, something will come up.