Isaac's Continental Rhapsody

Magic is the key and the poison. It can burn down cities with a single thought, and it can also cause civilization to collapse like cancer in the carnival of individual power. Hirokane, a stranger who traveled through time and was reborn, once tried to use scientific rationality to dissect this crazy world, but only gained the despair of two lifetimes. On his deathbed, Chao Xi, who calls himself the "Civilized Error Correction System", gave him one last chance - to return to the starting point where everything had not yet collapsed. This time, he stopped talking about theory. He started by hunting the first monster, used engineering thinking to optimize traps, used the laws of physics to analyze magic, and integrated Chinese martial arts into combat. He rescued dying orphans, giving them the names of "Xingjian" and "Shikun" and the belief of Tianxingjian; he awakened the fallen knight in the cage who called himself "Jin", and exchanged a life-and-death contract for loyalty. An imperial gold coin containing magic, a chaotic border fortress, a quietly growing plague conspiracy... In this world where magic is power and strength is truth, what Guangjie wants to do is not to become another "powerful person" who tramples on all living beings. Instead, become the knife bearer. For this world suffering from "civilization cancer", perform the most rational and craziest surgical operation.