Dan Feng may have spoiled the plot of HSR.
Yes, you read that right. That man appeared in version 3.6 for less than an hour, dropped some of the most concerning lore bombs and left as it it's nothing. And worst of all, we brushed it off. And yes, this is very much deeply entwined with permanence. In Honkai: Star Rail, every path has its own appeal and niches. Each path affects the cosmos in one way or another, and that's exactly what makes them so fascinating to research about. Some paths are more mysterious than the others, having less information... And Permanence definitely takes the cake for it. If you go into the data bank under the aeons section, you'll find bits of lore for almost every single path... except for Permanence (other missing paths being Order and Finality). Which is ironic, considering the one who manages the data bank is a scion of permanence...