The 3D Printer of the End of the World

One year, the Delta civilization, known as the God of Destruction of the Universe, entered the YZ121 universe. This is a wild universe. There are very few advanced civilizations. Earth, the planet inhabited by the strongest civilization in YZ121. God i, the most useless god in the universe, decided to imitate the novel. Let's have a vigorous self-defense counterattack! In fact, this is how Xianyu took a 3D printer to climb the technological ladder.