At this moment, Gui Xiang found it difficult to discern whether Zuo Feng was telling the truth, and it was impossible to verify with Yao Xun. He didn't have a clear understanding of alchemy, but a Xuan Grade pill was something he had never encountered before.
However, Gui Xiang was not someone lacking in insight. He could imagine that refining a Middle Stage Xuan Grade pill would require several experienced alchemists to spend a significant amount of effort and time, not to mention the terrifying cost of the materials used in refining the pill. It was estimated that the gold coins from the third auction combined would barely cover the material costs for one pill.
Someone who could provide so many materials couldn't possibly be as without background as Gui Xiang initially guessed. At the very least, Yao Xun's background should not be underestimated by the Puppet Spirit Sect.
