Go Back Ten Thousand Years Ago, and I Will Help Master Become the Great Emperor

[Semi-invincible + decisive killing + villain system + protecting the teacher + single female protagonist] Traveling through the world of immortality, Song Zhao became the junior disciple of Xiaoyao Sect. Although he did not have an awakening system, he had a powerful master and several equally powerful senior brothers and sisters, so his life was smooth sailing. Until the Master's promotion to the Great Emperor was in crisis, and he was thrown into the past ten thousand years. As a result, he was inexplicably bound to a villain's counterattack system. No, buddy, is it too much for you to ask me, a saint-level person, to counterattack the training period? What, you said there is a reward, then that's okay. Also, Master, brothers and sisters, you are definitely lying to me. Why is there such a big difference in personality between you in the past and you now? I thought I was here to correct history, but you asked me to create history?