Help finding manhua

Mc has a broken dantian and can’t cultivate. However he can see weapon spirits. He’s in a demonic faction and gets kidnapped by a higher up, the higher up forces him to train and learn a martial art that uses vital ki. But the art is incomplete, so he has to learn the rest from the spirit of the sword of its creator.

Sorry for a rough description I’ve been trying to find it for a few hours.