C189 Seven stars cartilage powder

Zhang Hongjun thought for a moment and asked, "Senior Master, is there any poison that can cause people to lose their ability to resist after being poisoned, and the person who is poisoned can't find any traces of poison after dying?"

"Seven Star Cartilage Powder!"

After hearing Zhang Hongjun's question, Zhuge Yun and Yuan Tianxing answered at the same time