Qianzhujiao - S1.E17

Senior Brother Wu discovered that Senior Brother Ye was actually a spy in Huang Fenggu, and made a secret deal with Zhong Wu, the "Spirit Beast Mountain". Later, Senior Brother Wu was hunted down by Senior Brother Ye's puppet, and happened to be bumped into by Han Li who was driven back to the cave. Han Li immediately rescued Senior Brother Wu and fled back to the cave, and used the unfinished upside-down five-element formation to resist the puppet onslaught. At the critical moment, Lei Wanhe rushed to kill Senior Brother Ye at the stage of forming pills. Brother Wu died in this battle, and Han Li also obtained the Great Evolution of the Thousand Bamboo Sect in Brother Ye's storage bag.