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[Multiple heroines], [Simulation], [Shura Field] Traveling through the collapsing iron world, Jiang Xia thought he could board the train and enjoy life, but instead he traveled back to the body of the Lord of Extinction. Even in the midst of destruction, Jiang Xia still had a heart to explore and went to find Ji Zi to build the train together. But after repairing the train, Jiang Xia was not only captured and locked up in a small black room by the Star God of Destruction, but also captured by the Interstellar Peace Company, sent to the guillotine, and executed live. Unable to save the immortal, Jiang Xia awakened the simulation system. The system can edit the past of other characters, but cannot change the established future. Jiang Xia: "Liuying, Black Tower, Huangquan, I can only rely on you to save me." [Simulation of Liuying's life: Become Liuying's teacher and sacrifice everything in order to cure Liuying's loss of entropy. Liu Ying: If you dare to touch my teacher, I will set the sea on fire and burn the company to ashes [Simulating Black Tower Life: Become a Black Tower teacher, spend your life protecting the Black Tower and embark on the road of knowledge] Heita: In my opinion, my teacher is the stupidest person in the world and the person I admire the most. Who of you dares to touch him? [Simulate Huang Quan's life: Become Huang Quan's brother and forge the world-defying imperial sword for Huang Quan. Huang Quan: It's useless to talk more, I mourn for the deceased (The title of the protagonist, the Lord of Extinction, is a label. The simulated world has slightly changed the heroine's life experience, and the background world is retained. It is a new thing that the author suddenly came up with. I hope everyone likes it)