Li Yun, a materials science PhD in his previous life, transmigrates into a dwarf tribe as an old mine slave with only two years left to live. Though he has no talent for magic, he uses his knowledge of materials science to overturn the world's entire system of forging. But he soon discovers that this world once had an "Observer Civilization" that tried to rewrite the laws of reality through "science," only to be erased by the "Guardians of the Laws." Every technological breakthrough he makes draws the attention of something ancient.
"An old mine slave who can't use magic sparks an Industrial Revolution with materials mechanics in a world of swords and sorcery, only to discover that he is awakening the dormant Guardians of the Laws."
