If it exists, he can drink it safely; if not, he can only be controlled and manipulated.
After pondering, he decided to drink.
Why? Because now he had Bright True Master's alchemy techniques, as well as Qingxu Immortal's alchemy techniques. Even if Bright True Master's alchemy could not resolve this ancient poison, he still had Qingxu Immortal's techniques.
Qingxu Immortal was a cultivator from ancient times, and his alchemy skills were far superior to Bright True Master's; involving more profound knowledge, they could likely neutralize the poison set by the Cave Master.
So, it's worth gambling; what if he truly can cure the poison, he wouldn't need to return to beg the Cave Master for an antidote. Moreover, he might obtain a precious orange Immortal Ring.
