Ybur returned from Hidden Moon and started pondering over the matters described by Hidden Moon.
In the past, when Ybur learned that a Mysterious Source could be bought and sold, it once asked whether it was possible to purchase someone else's Mysterious Source to achieve Advancement—the answer was no. Because a Mysterious Source carries a strong personal inclination, another person's Mysterious Source would clash fundamentally with one's own.
But Hidden Moon told it: the reverse, however, is possible.
So, the method to "preserve a Mysterious Source," though seemingly complex, is actually quite simple—hand over one's Mysterious Source to others for cultivation and care...
