Prehistoric Simulator: Pick Out the Immortal Killing Sword at the Beginning

The simulation game of cultivating immortals is accidentally linked to the real prehistoric world. Su Lin, who thought it was just an ordinary stand-alone game, chose the highest difficulty level 'Hell' at the beginning. Little did he know that every time he died and was reborn, the great men in the ancient world would be forced to turn back time and their mentality would explode. Until the end of a certain simulation, Su Lin found an Immortal Killing Sword in his backpack, and a friend named 'Tongtian' appeared in the chat group: "Fellow Taoist, can you change the world by shedding wool?" Su Lin: "???"