The whispers of the old gods enveloped the entire continent, potions flowed quietly in dark alleys, and the shadow of a dragon passed over the steam-filled city dome. A stranger was reborn as the most humble being in this world—a gray mouse. However, he started from the dark sewers, step by step farming, infrastructure construction, alliances with foreign races, and deciphering lost runes. The roar of steam resonated with the whispers of magic, the gears turned, and the dragon flapped its wings. He transformed into the "Sherlock Holmes" detective who had never appeared before, weaving an underground network that spanned races and classes, vowing to break the oppression of theocracy and use the power of machinery, magic, and faith to create a new era of civilization for all intelligent creatures, sharing, and co-governance. ——When he first stepped into this world, Lu Ran had only one self-deprecating sentence: "I, Mouse, am going to die this time..."

"Brother, is our Du'e Sect... truly a legitimate sect?" "Of course, Junior Brother, quickly register on this 'Disciple List,'" the green-clothed figure said, pointing to a sinister black banner. ...Once transported across time, Chu Mo became a "reserve soldier" of the Du'e Demon Sect. He had thought he would be opening the door to immortality and the freedom of swordsmanship, but he hadn't expected that cultivation in this world was different. Conquering seas, plundering planes, unifying all realms, immortal boats traversing the void, and massive cannons bombarding otherworlds. Cultivators searched endless worlds, waged cross-border wars, spread their teachings, and infested planes... This place was rife with dangers, but also filled with opportunities. ...Luckily. Chu Mo discovered that he could see his health bar, becoming the sole player in this distinctly different world of cultivation.

Di Xiu transmigrated, becoming a gray rat in another world. Not only must he build a protective dungeon to safeguard himself and his race, but he must also constantly guard against invasions from other races. Humans, gods, demons, monsters, dragons, elves, ancient taboos... even outworld gods coveting the world! The former order crumbles, and the apocalypse topples the towers of civilization. In the face of life and death, Di Xiu comprehends the truth of magic. Magic is not chanting, but a rigorous set of underlying world protocols! Only with the correct logical framework can it be safely compiled and run. While other mages are still struggling to chant spells with their flesh and blood, Di Xiu is already debugging magic circuits in the dungeon, developing the third-generation gray rat exoskeleton armor, heavy armored mechs, and aerospace carriers... The magical industrial age has begun! The gray rats are building a jungle of steel and gears. Mechanical rats wield precision...