Invincible, I Intend to Conquer the Entire Universe Again

I am invincible in this simple world. Many people have challenged me, but they have never beaten me. The universe has been conquered by me. I heard from my second brother that I can travel to the past and conquer it again, and increase the difficulty. I became interested, and then I conquered the universe again. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.