Demon Cultivator, You Want Me to Be the Leader of the Immortal Alliance?

He traveled through time to become a demon cultivator and became an undercover agent placed by the demon sect in the Immortal Alliance. Chen Jun thought he was going to go all the way to the dark side, but accidentally activated the jade mirror with rewards attached to the rank. [Rank: Supreme • Immortal Alliance Leader] [Initial reward, Immortal Weapon·Shenxiao Sword] [Seven-day reward, elixir and good luck pill] [January Reward, Exercises·Sun Breathing and Nourishing Wheel Sutra] [One-year reward, skill and immortal golden body] [Ten-Year Reward, Immortal Artifact·Gold Leaf Taoist Book] [Jiazi reward, physical constitution·innate Taoist body...] Wait... Daily Settlement [Enter the ancient secret realm today, gain the legacy of my ancestors, and make great progress in cultivation... Evaluation A] [Reward: Taoist Law 'One Qi and Three Purities'] Chen Jun would occasionally remain silent, saying, "Why do you want me to be the leader of the Immortal Alliance?" A few years later, during the war between immortals and demons, the Holy Master of the Demon Sect came to the Immortal Alliance in person: "Where is the Holy Son of the Demon Sect? Come out and help." "Return to the Holy Lord..." "He has become an emperor!"