Scattered the soul

Dong Xuelian's heart sank. She knew that Song Yan was not playing with her, and she was going to kill her, certainly. She stuttered in horror, "No…no…you cannot kill me. If you kill me, then my master will avenge me. He is a Perfected one! He is Perfected, Wei! He won't let you off for killing his disciple!" 

"Don't worry. Like I said, that Perfected Wei would come to look for you in the underworld very soon. Then you can settle scores with him, after all, if not for him, you wouldn't have foolishly tried to harm my husband, right?" Song Yan narrowed her eyes as she sneered. Taking advantage of when Dong Xuelian was in a stupor, she unleashed the controlled yin energy that she hardly ever showed anyone. This was the Yin energy that she had collected for five hundred years when she was, there was no way anyone would be able to process it. 

Not unless they have cultivated for well over five hundred years.