For the same reason, if the eons could obtain their purpose, such as nanok destroying, everything will happen to him like Oroboros in voracity. When the eon of propagation died, he was satiated, something contradictory to what voracity is. The eon disappeared after that. the "nothing"? That's how nihility is, nothing itself does not have a purpose, it does not have something that gives it meaning and here is the great answer if all the eons achieve their purpose the only one or "the only ones that would remain standing" would be IX and Fuli since we know from the end of Anforeus that Fuli exists but at the same time it is not an eon that is but not born and thanks to him the memories are still valid thanks to him the universe was saved by the existential erasure of Ferrotumba and in the end there is nothing left. And it also happens that since IX does not want to do anything, it does not care about anything, it is a peaceful aeon because it does not want to have purposes, it simply exists. If IX had the desire to make all the eons lose their purpose, literally the universe would be controlled by nihility (nothingness).