C643 Auction of Spirit Milk

After a long while, Ye Xiao finally snapped out of his shock, but even if he knew what the Black devil king required, it was still extremely difficult. Even if Qian Shen could refine a seventh grade Yuan Dan, it would be difficult to gather all the ingredients in a short amount of time.

"Other than the Yuan Dan, what else can achieve the same result?" Ye Xiao frowned