I Apprenticed Under Zuo Ruotong at the Beginning, and the System Gave Me an Immortal Body?

At the beginning, he traveled through the world of one person, became Zuo Ruotong's disciple, and activated the Lao Deng counterattack system. [At the age of eight, you entered the Trinity Sect and became Zuo Ruotong's disciple. [At the age of twelve, when you were practicing the third level of rebirth to the second level, you encountered a rootless being who ran into the mountain. If your practice went wrong, your cultivation would be ruined. At the age of fifteen, no roots were born in the Trinity Sect, and all the Trinity Sects were destroyed... [At the age of thirty, with no master to rely on and no relatives, you lived in a muddleheaded way, and in the end you were killed in revenge for your master. [Laodeng's counterattack system is successfully activated, and the reward is: cleansing essence and cutting marrow, Hunyuan Qi...] [Main mission: Find and defeat the rootless source of the Trinity Sect's destruction. Reward: Immortal body, infinite advancement of skills...] Looking at the system interface in front of him, Zuo Qingxuan fell into deep thought. No, Tongzi, did you find a bug? I am only five years old! What the hell is Lao Deng's counterattack? But that's not important, Wugensheng is here! When Zuo Qingxuan found Wu Gensheng in Yinghe Tower, he punched him without any hesitation. [The mission is completed and the reward is obtained...] Although Tongzi made a mistake and arrived ten years early, it is really delicious! ! !