[Erosion] was a law that not even gods could escape.
All life would wear away, deteriorate, and become twisted in the river of time.
The goddess known as the [Sustainer of Heavenly Principles] bore the duty of keeping the laws of the heavenly principles in motion and protecting the continent from destruction.
Her most important mission was to destroy human civilizations in Teyvat before they developed far enough to attract the universe's attention.
Only then would this continent escape the universe's notice, its destruction, and being shattered.
In theory, the goddess carrying out this duty should have been one who loathed humanity.
Yet this goddess known as the [Sustainer of Heavenly Principles] was, like Feng'er, a goddess who deeply loved humanity and every living thing upon the earth.
At the end of the ley lines, Ellin had learned that in the earliest days of a new civilization, humans could always receive guidance from Celestia.
The gods told them how to develop, how to survive and multiply, and how to move forward.
But as human civilization gradually flourished, people suddenly discovered that they could no longer receive guidance from the gods.
So they sent their most revered High Priest into the deepest reaches of the ley lines to seek an answer.
There, the High Priest received an answer: every civilization that reached its pinnacle would face destruction.
The [Keeper of Heavenly Sustainer] was just such a goddess.
From Celestia, she looked down upon everything on the earth.
Burdened with upholding the heavenly principles, she knew she had to destroy flourishing civilizations. Only that way could she preserve this continent, teetering on the brink of shattering, for ages to come.
She loved humanity and everything upon the earth.
Yet that was precisely why she had to destroy them.
Because after destruction, humans