The Flying Star Academy teacher and Lu Yuanxiang were familiar with the powder. Powders like True Dreams were of no use to martial arts practitioners like them. They had seen many elixirs that could cause hallucinations, and could easily guard against them.
However, according to what Ye Qing had said, the demons in this realm did not seem to know much about elixirs. At most, they had some knowledge about natural herbs. Therefore, they would not suspect or guard against elixirs that they had never seen or even heard of.
A moment later, Lu Yuanxiang said, "That's a good idea. It might work if we use the unknown to deceive those demons."
"Yun Chen, go and refine some True Dreams. No need to refine too many." Ye Qingtang instructed Yun Chen, who was standing nearby.
Yun Chen nodded. "Boss, there's no need to refine. I have some here."
"In that case, let's leave this place now," said the Flying Star Academy teacher.