C79 Gu man
According to the old gramps, after one learns the parasite techniques recorded in the Zang Ren Jing, there is a high chance of them turning into a Gu.
Be it the internal organs or the external skin, these living Gu would slowly erode until there was nothing left.
Although this sounded a little scary, the old man bluntly said that becoming a Gu wouldn't necessarily be a bad thing.
That's right