God of Creation/Everything

It was a dangerous era. Extraterritorial ferocious demons occupied 80% of the universe while they enslaved humans and other beings that were weaker than them but that changed after a being was born in the human world with the power of a God but he was still human he gained a system that gave everything he needed to control the universe. Follow the main character on an adventure throughout the universe while he destroys demons or other beings that underestimate him and the enjoyment of conquering other planets.