Within the 9-9 Approaches to Medicine, the simplest immortal medicine was naturally the Spirit Concentration Pill.

Feng Xueya also knew how to make the Spirit Concentration Pill. Of all the immortal medicines, this Spirit Concentration Pill was the easiest to make.

Nangong Wei sat cross-legged in a corner of this training room. Various colored flames danced on her and rolled across her body. That nine-colored flame was like a cocoon and wrapped her within. In the flames, you could feel the change happening at every moment.

Wu Yu, on the other hand, was at another corner of the training room. He first performed a blood bond on the Three-Legged Cauldron. Then he placed it before his eyes and used his heart to sense the immortal treasure spirit design of this Three-Legged Cauldron. This immortal treasure spirit design included various effects, like air-blast, refining, magnifying, and adjustment of immortal fire. Its immortal treasure spirit design was comprehensive, and compared to a normal cauldron, the success rate was much higher. 

Spirit designs were something even more complicated and mysterious than immortal medicines. Wu Yu was not anxious to fashion spirit designs right now. He wanted to first understand how to refine immortal medicines. 

It was said that any successful martial cultivator would have relatively outstanding abilities in refining...