Because the Spiritual Grass was a rare medicinal material aged half a million years, the Spiritual Qi it contained was extremely dense, almost reaching an unimaginable degree.
This dense Spiritual Qi was extremely difficult to control during the extraction process, and the slightest carelessness would lead to the failure of the entire pill-refining process.
Ye Chen knew very well that Spiritual Grass aged half a million years was exceptionally rare, and the density of the Spiritual Qi it contained far exceeded that of ordinary medicinal materials.
Chapter 1208