Evil God's Homecoming

I have ruled a world for five hundred thousand years after my reincarnation to another world. I was strongest being ever lived on that world. I was so bored with my power that, I have decided reincarnate back to my former world. By thinking that I am finally back to world with no power, I saw the day after I died on my real world super power has manifested in the body of normal human being. And I also came to know why I was dead that day.