章 356: Saint Breakthrough Pill!

Within the huge medicinal cauldron, flames were burning fiercely.

The irregular circle formed from the essence of more than a dozen precious spirit herbs was constantly squirming at this moment, and the surface became increasingly round and smooth.

The gazes of Qing Zhu and the others were firmly locked onto the medicinal cauldron.

Not long after, a faint pill fragrance drifted out from within the cauldron.

"What a pure pill fragrance..." a trace of surprise flashed across Elder Gu's eyes, and he could not help but mutter.

Not far away, Yun Zhiyi's expression was also filled with surprise. Although he had never seen this so-called Saint Breakthrough Pill, he had stayed in the Eastern Continent for a period of time ten thousand years ago and had some understanding of the so-called pill refinement.