Vol 7 seemed to be more background information than anything for me, an important volume for sure as we learn more about The Corpse God's past. Solitaire is working with The Fire Breathing Bug but to what end I still have absolutely no idea and to be honest I'm not even sure *he* does and Xiaoyu finally decides to give The Corpse God a chance and gets a scaly (not a typo) new arm out of it.