Head of All Systems

What, the system was taken away by a mysterious organization? What, my system is the head of the system? What, I have to save 100,000 systems at the beginning? Chen Xu traveled to the world of immortality three thousand years ago and was bound to the system. The moment he was bound to the system, the system taught him everything and gave him enough treasures, but it did not destroy his cultivation level. However, the system said this to him, when you find that this aura is getting stronger and stronger, come and save me! After that, the system died. In a hundred years, he has become a lawless and powerful man in the world of immortality. He is free and easy, and he will do whatever he refuses. In a thousand years, he has experienced a lot. He is looking for the system, or it can be said that he is saving the system. He accepted a group of apprentices, and they were also lawless. One day, the apprentice betrayed him, and the aura mentioned by the system was getting closer and closer...