The protagonist, Legen, travels to a world where magic is scientifically utilized. Here, humans bravely fight for the survival of all life on the surface! No matter what, humanity must not lose! This is what the human from Earth declared. （The author is Chinese and not very proficient in English, so the entire text has been translated by AI software. I apologize for any errors or discomfort you may encounter while reading. Posting on Royal Road is a small experiment for me, and I am very eager to have readers enjoy my novel. I welcome all comments, whether praise or criticism. Receiving feedback will greatly motivate me to update more frequently.）