Nothingness God

He dedicated his whole life to seek the power to become a God. But when he succeeded he was betrayed by his six best friends to steal a treasure which he had to protect. But before he died a mysterious Goddess who saw the whole event told him that when a God dies they can reincarnate a mortal life in the thousands of worlds of the universe. Having a new opportunity not only would he rise to the top and have a power that would pass over to his previous self, but in this new life he will pursue the desires he ignored in his previous life, while discovering the mysteries that surround him.