C480 Enemy seeking poison gu

"What's missing?"

Yun Zihuang was soaking in the hot water and pondering about this question. He had a feeling that if he could think about it carefully, he would be able to find the answer no matter what. What was distressing was that even though he had sensed and missed by a little bit, he was unable to find it. He had never imagined that there was actually something wrong with it