Comprehensive Manga: Memories of All Worlds

I, reincarnated and practicing for tens of thousands of years, finally reached the pinnacle and took over the position of the God Lord of all realms. But, who am I? A generation sword god? The strongest saint? Or the Overlord of the Ocean. In order to know who I really am, I opened a door and traveled through the scenes in my memory to learn who I really was. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.