749 from the Start: While Everyone Else Exorcises Demons, I Hunt the Protagonist

[Villain protagonist + invincible + ruthless + fast-paced plot] Lu Yi transmigrates into a parallel world and joins Bureau 749, only to discover that the protagonists from novels have all become monsters corrupted by the supernatural, known as Children of the Uncanny. The Children of the Uncanny have three gifts: First, they can subtly influence other people's emotions. Second, they are immortal, and their bodies recover quickly from injuries. Third, they have a fortune halo. Anyone who tries to kill a Child of the Uncanny will find events spiraling beyond their control. Lu Yi is unlucky enough to offend the King of the Uncanny, Dragon King Jiang Chen. But he's also lucky enough to awaken a System: every Child of the Uncanny he hunts earns him more and more gifts. And so, an emotionless hunter feared by every Child of the Uncanny appears, cutting his way from the east side of the city to the west and wiping out every last one under the Dragon King's command. But by now, Lu Yi is backing away in a panic too. “Empress Skyfox, if you're going to help, then help, but why are you taking your clothes off?”