Zhou Yan did not leave this place; instead, he silently refined the souls of the cultivators one by one here.
Their realms were around the Ninth Layer of the Condensing Core Realm, and they cultivated unique inner cores.
In Zhou Yan's view, these inner cores are the so-called embryonic forms of souls, essentially the early stage of Sword Souls, although they manifest differently due to different cosmic rules.
However, Zhou Yan was completely indifferent to this.
After stripping away the souls of thirty black-robed cultivators and devouring their memories, Zhou Yan felt quite fatigued.
This feeling was unpleasant because many methods were merely relying on some residual strength.
If this strength is to be valued for the future, and if he plans to return to the Emperor Soul Clan one day, he needs to endow the human skin with certain foundational depth.
