Look at My Eyes and Act

It is said that time travelers can fly through the air in seconds. Not only did I not become the protagonist, I was almost chopped into pieces by the protagonist. The protagonist forced me to teach him the exercises. I traveled through time with only a trace of my soul left, my memory is severely damaged, I even forgot my last name, and I can't even practice cultivation. So I taught him "The Thousand Character Essay"... Unexpectedly, he actually succeeded in practicing and became an awesome monk, invincible. So I taught him Tai Chi. Very good, very powerful. He has also developed peerless magical powers. He has the qualities of a great emperor. Even in the cards I carry with me, he can learn invincible magical powers from them! I doubted my life at that time. Could it be that before I lost my memory, I was really an invincible power? There is no other way... Since I can't beat him, then I can join him!