Qin Mu and the Little Poison King had changed the prescriptions seven to eight times, and they were getting slightly flustered. It was the first time they were working together, after all, so there would always be some places that weren't as they wanted, some places where they couldn't complement each other perfectly.
Furthermore, both of them wanted to outdo each other, so the tonic that Qin Mu gave Little Poison King wasn't just thirty to fifty times stronger but sixty times stronger instead. The bottle of poisonous liquid that Little Poison King had given Qin Mu also had a higher toxicity.
The two of them pitted their abilities against each other and the ones suffering were the emperor and Eternal Peace Imperial Preceptor who got tortured endlessly. What's more, they couldn't even move, struggle, or call for help.