C389 Use Gu to Attack Gu

Liu Zongshi and his team had encountered great difficulties in their search for medicines to restrain the Poison Gu.

The medicine that was effective against the Poison Gu in Gu Yih's body before, was still effective against the mutated Poison Gu at the beginning. However, the mutated Poison Gu quickly developed drug resistance and the effect of the medicine was greatly reduced