What happened to Wei wuxian in the burial mounds

I was rereading one of MXTX’s interviews and she said she didn’t write about it because it would’ve been very long and she didn’t want to write it. she also said she doesn’t like writing a transformation sequences. Moving on to my main point, MXTX says

Female host: Okay… But what we can say that what he experienced must be torturous.

MXTX: Yes, it was horrific.

Female Host: It isn't a starting point. No, wait, horrific, it probably would not be a pleasure reading that kind of transformation…

MXTX: You won't feel good after reading it.

I think a lot of people (myself included) forget about how much Wei Wuxian suffered in the burial mounds because what happened was never written, but based off what MXTX said, it was terrible. And his experience in the burial mound mixed with his demonic cultivation and what he went through before he was thrown into the burial mounds, it’s understandable why he was so irritable when he came back. That amount of horrific suffering takes a while to shake off and for some people, they might never recover.

Also, now I want some fics about Wei wuxian and what happened in the burial mounds. I know it won’t be canon but I need something right now 😭
So if anyone has any recommendations, please, do let me know