Li Yun, a doctor of materials science in his previous life, traveled to a dwarf tribe and became an old mining slave with only two years left to live. He doesn't have any magical talent, but he uses his knowledge of material science to subvert the world's forging system. But he soon discovered that there once existed in this world an "observer civilization" that used "science" to try to rewrite the laws of the world, but they were erased by the "law guardians". Every technological advancement he makes arouses some kind of ancient gaze.
"The old mining slave who does not know magic used material mechanics to trigger the industrial revolution in the world of swords and magic, but found that he was awakening the sleeping guardian of the law."
