The Overlord Cannot Cross the River

I have a gun that can drive away gods, drive away immortals, and break the sky! I have a banner in the world of celebrities, the three emperors enlightened the world, and the first emperor sealed the sky There is a tyrant in my world who wields a gun and attacks the sky The overlord cannot cross the river, but the Milky Way enters our territory There is a sea of stars as far as the eye can see, where is this foreign country?