The Fake Eunuch: Nine Thousand Attendants of Qin

After transmigrating into the Qin Dynasty as the lowest-ranking eunuch in the imperial palace, all he wanted was to stay alive.

But his congenital condition suddenly changed. When his blood surged, his manhood would be exposed. If discovered, he would be subjected to death by a thousand cuts, and his entire family would be exterminated.

So he endured, used others' power to his advantage, and killed his way from menial servant to the man in control of the Secret Pavilion. Soon the whole realm would address him as the Nine-Thousand Attendant.