Immortality, starting from the library to sweep across the world.

To attain longevity and protect his path, he began his journey of cultivation. "The years flow on, burying countless emperors and heroes, martial arts prodigies, and titans of immortals and demons. Only I sit and watch the clouds shift, moving forward through the shifting sands of history..." The first realm of longevity: Ripening precious herbs. The second realm of longevity: Changing form and appearance. ... And so, beneath the hibiscus tree, he attended the funeral of his friend, the world-renowned Nine-Thousand-Year-Old of the Eastern Depot, on a rainy night. With one sword strike, he shocked the world, and only then did the world realize that this "useless cripple" who hadn't stepped out of the library in ten years was actually an unparalleled, monstrous genius. In the pharmacy, for the sake of the kind old man who had accompanied him for three years, he stirred up the winds and clouds once more, shaking the world awake from its dreams and reminding it of this—the world's number one rebel... ... Longevity is a lonely path, perhaps. But for these thousands of years, the young man who walked out of the library has always been the one stirring the winds and clouds of the world! He has buried the heavens, buried the earth, and buried all living things! Even gods, ghosts, demons, and monsters must address him as the Ancestor of the Demonic Path!