The Great Soul Pill's primary ingredient was technically nothing special. In fact, Luo Chen had obtained it before: soul essence. 

In theory, there should have been quite a lot of soul essence around, considering that every living being possessed three ethereal souls and seven corporeal souls. Yet the "corporeal" designation was nothing but terminology; in reality, all ten souls were inherently formless and intangible. A soul could only manifest directly when a being reached a sufficiently high realm and its soul actually condensed. Ghost Generals and Ghost Kings, for instance, appeared to have physical bodies, but they were fundamentally not corporeal. Instead, they relied on massive amounts of condensed yin qi to sustain that appearance.

Over countless generations, cultivators had developed secret arts capable of extracting essence from these insubstantial souls. The substance they produced became known as soul essence. Yet while souls existed everywhere, refining them into something usable was anything but simple. That was also why soul essence was so valuable. When absorbed through the proper technique, it could greatly strengthen a cultivator's divine...