Xi Shen was starting to get cautious of this girl, there was definitely something strange about her. Simply from the fact that even though she cultivated Slaughter Qi, Xi Shen could not even sense a whiff of it on her now. It’s as if it was completely locked away in her body, and this was strange since one annoying feature of being in the Sea Expansion Realm was that your Qi energy signature was uncontrollable for most people.
That was because a person's meridians would be open allowing your pores to passively absorb the Qi in the surroundings albeit slowly and unnoticeable unless you actively do it. This passive Qi absorption was extremely hard to hide and anyone with sharp senses would know that you were in the process of expanding your Qi Sea.
But Ling Xia didn’t have this feature, she still look like she was in the Meridian Opening Realm.