Proving Immortality Starts with Making a Contract with the Holy Girl of the Demon Sect

Wang Zheng traveled through time. Good news: This is a world of immortality, where immortality can be proven. Bad news: I have become a handyman in the alchemy room of the Demon Refining Sect, and will soon be drained of all my energy by the witch to make the elixir. At the critical moment, Tongzi arrived late but with ten times the damage effect, the witch felt numb instantly. What? Is there a forced contract function and an additional bonus of mind reading? What does it mean to predict the enemy's opportunity? That's it! Can self-inflicted harm be re-injured tenfold? Jie Jie... And so, the most powerful Demon King Hun Tian was born! No matter you are a genius goddess from the Immortal Sect or the most powerful empress from the Demon Sect, you have to kneel down and lick me! Not convinced? Ten times the damage, can you handle it? Someone is provoking? So and so... Come together and help him! Make it painful for him to go! My name is Wang Zheng, an ordinary time traveler who started from a humble beginning and vowed to become the most powerful immortal and ride the most powerful woman!