C802 Herb Purification

"You want to refine Yun Huan Dan?" Ling’s widened his eyes.

"What, can't I?" Wu Chen glanced at him and asked back.

Suddenly, Ling’s laughed loudly and said, "Hahaha, this is really funny. You also know how to refine Yun Huan Dan?"

A Yun Huan Dan, this kind of medicinal pill, a complete pill formula, had long been submerged in the dust of history. No one was able to refine it, even his Master