Immortality: My Rise in the Palace

Crown eunuch Xing Bang transmigrates into a high martial arts world and activates the Fenghua Mirror System upon entering the palace. He navigates the harem, leveraging Empress Dowager and Lady Fanghua to rise rapidly with the system's divine arts, climbing from a lowly servant in the Yeyouting to the head eunuch. He saves the crown prince, eradicates a plague, solves a mystery, and eliminates a powerful minister, earning a title and leading the Western Factory. Upon realizing the Emperor's conspiracy, he allies with the witch clan, gathers forces, and leads 100,000 iron cavalry to breach the imperial city, dethrone the tyrant, and ascend the throne. Finally, he establishes a new dynasty with his beloved women, completing his impossible reversal from a fake eunuch to the sovereign.