NEED HELP FIND XIANXIA MANGA

I only remember the title has the word Thread flowing waters i think but no results are found when i type these.. The story was about a grandmaster of the white sect who went missing because he saved the Demon sect's last relative, his nephew. This nephew is the ML, he has long black hair and red eyes. Our MC fell from a cliff to save the child and used his last remaining power to infuse the child with him rendering him lame and no different from a human. He worked at the Demon sect as a slave because he couldnt part with the ML. The ML doesnt remember his past because his uncle wiped his memory because when he saw the MC die, the young child tried to off himself too. to counter that trauma and separation anxiety, the uncle had to wipe his memory but fate has it and the two met again and ML is attached to this slave with a burnt face. the uncle wanted to get rid of MC because his being so close to the ML will trigger his forgotten memories and by killing him his nephew will live a good life. pls help TWT