Thinking about--whatever the No-God is, it's an effective way to get rid of all of the derived if the story has a happy ending. No-God used to somehow kill them all or herd them all into the ark which is sealed and/or launched into space.
Could be a cool twist. The No-God arises, the Great Oreal, surrounded in an ocean of Sranc, prepare to die, then all of the Sranc begin consuming each other! The men see Mog approach, Kellhus leans out the carapace's window with a big smile and a thumbs up.