Starting from a Magical Girl and Launching a Great Expedition

Roy, who longed to become the emperor's angel and the sharpest sword of human civilization, traveled through time and came to the core of the human empire, the emperor's golden throne. He thought that after his soul returned to the Golden Throne, he would become the Emperor's angel, a glorious Astartes, but he was sent to another world by the Emperor to serve as the savior of human civilization there. Facing a world that was no different from his previous life, he thought he would live an ordinary life again, but he never imagined that there were miracles and magic here, and there was an existence called a magical girl. Disasters fell from the subspace and trampled on the land that belonged to humans. Aliens called elves relied on their identity as the guide of magical girls to act recklessly among the tribe. Human civilization is in danger, and the disintegrated ethnic groups are on the verge of destruction. What should humans do in this situation? "It's very simple. First become a magical girl, then use genetic technology to create several powerful magical girl armies and launch a war to unify Terra." "Then launch the Great Crusade, set fire to the galaxy, and drive out all aliens." "Finally build an etheric phase engine to drain the subspace and upgrade the entire human civilization to a higher dimension." Roy said this as a fan of the Warhammer 40k series and Star Wars. ...