The elixir was produced by the Joyful Zen Sect and while it had the effect of repairing both true Yang and true Yin, it also contained some ingredients to heighten excitement.
Yan Yu was completely unaware of this, and although Li Minghu sensed something was amiss, she was unwilling to believe Yan Yu was the kind of debauchee who would tamper with Elixir Medicine, so she merely forced herself to strengthen her Dao Heart and suppress any irrelevant fanciful thoughts.
After both had rested and recuperated, they continued to make their way along the passage.
Yan Yu's right hand stealthily formed sword techniques, ready to command the Huang Tingjian and Liangyi Sword to unsheathe at a moment's notice; his left hand conjured a spell, controlling either the Puppet Ah Zhen or the primeval mist of the Tai Qing.