Adui
Before I had confusions as to why the opposite of Chaos was Fate instead of Order.. The last chapter gives a glimpse as to why it is so.. In this concept, despite how you try to steer fate... It has a certain flow that it returns to, always.. Similar to how the Celestials wanted to get rid of the World Engine but ended up embarking on the path of their destruction, The weapon of which being Noah.. It could be said that it only happened due to the meddling of Inuit, but that was only a balance to the Celestials meddling first..
I am assuming that they are basically trapped in another spiritual realm with the only difference being that their "master" chooses not to interfere directly anymore (I assume only the ancient races have seen the master which would make a lot of sense considering the direction of noahs spiritual land where it's giving birth to different species of creatures who may also one day be called the ancients)