老师奖励我吃她的两座大山

It is recorded in the Tianyan Feisheng Jue that you need to use the sky thunder to refine your body in order to withstand the thunder tribulation and reach the level of a human immortal. However, I have been practicing for more than 20 years and have caused the heaven tribulation, but I still can't bring the thunder and fire back into my body. This What is this about Lu Feng’s Heavenly Thunder and Purple Fire?...