"In the era of the gods, mortals cannot fathom."
Celine's words essentially reveal the attitude of more than half of the people in this world towards "Ancient Civilization," which is although unclear, feels impressive, and no one dares to research and understand it—even she, as clergy, doesn't dare to tamper with it recklessly.
Now, I can roughly guess what happened on this planet, the historical truth should basically be like this:
