Convincing Xiao Ying was not difficult.
The main reason she advised Zhouyang not to keep a Ghost Servant was the fear of being attacked by other cultivators if the news got out.
It wasn't because her sense of justice was so strong that she couldn't stand the existence of anything evil.
Zhouyang knew this well, which made it easy to "target the problem" and successfully persuade her.
However, while persuading Xiao Ying was easy, it was quite difficult, or even impossible, to mask the fluctuation caused by Xu Song's Core Formation.
As Xu Song began to formally undergo Core Formation, the array he had set up to seal the Yin Qi within the Three Yin Forbidden Land had already failed due to the impact of the Core Formation Celestial Phenomenon. The surging Yin Qi, without its restraints, coupled with the changes brought about by the Core Formation, rushed out, turning a vast expanse of the surrounding waters ink-black.
