Du Fei's consciousness delved deep into his Dantian Qi ocean, casting a somewhat perplexed look at the Yin Yang Pill in front of him, feeling momentarily helpless against it.

After absorbing a trace of Du Fei's mental strength and Qi, the surface of this Yin Yang Pill began to exude a faint light. This luminescence appeared like intertwining threads, constantly shifting, giving the impression that there was a formation on the surface of this pill when one glanced at ...