Supreme Swordsmanship

If the memory is passed by for tens of billions of years and everything has been forgotten, will the person still be the same person? That day, I understood that the most terrifying thing is not losing, but forgetting! Later, I took my sword with me to understand everything in front of me, until one day I heard what all sentient beings said! The three-foot green front is the most ferocious since ancient times! Who I am? Later, I also forgot about it. I only knew that there was a person in this world, and all living beings called him the first emperor of all heavens throughout the ages. And me? There is only one name in my ears, but I am the first