Despite being a King-level powerhouse, King of Joyful Sound didn't think much of Yang Chen, just a Great Ascension Stage kid, and even felt extremely angry when thinking about it.
After all, this represented her having an unworthy past with Yang Chen, which naturally angered her. She even thought about forcing the thing Yang Chen left in her body out. Last time, she did just that!
However, when she actually tried to do this, she accidentally discovered that what Yang Chen had left in her body contained an astonishing amount of life force.
For a moment, she became doubtful and observed it carefully, only to find out that what Yang Chen left in her body actually contained the essence of spacetime, life and death, and many other things.
If she could refine these into a part of herself, she could at least incorporate a part of spacetime and life and death into her techniques and methods, even if she couldn't control these powers completely.
