Elderly Cultivation: Crushing Prodigies at Eighty

On his eightieth birthday, Li Mu, who had transmigrated sixty years ago, finally received his golden finger—the [Old but Strong] destiny. His cultivation speed increased eightfold, he mastered any technique instantly, and his foundation was rock-solid, with no risk of qi deviation. However, he was already frail and had only one year of life left. Having scraped by as a junk collector and orphan raiser in the chaotic lower class, Li Mu had resigned to his fate—until he killed a human trafficker leader to save a neighbor girl. Spies, aristocratic families, the Longevity Cult... a mysterious net targeting his adopted grandson slowly closed in. The eighty-year-old stepped into the martial world, only to realize that in this world, fists speak louder than words. Even at eighty, he could still turn the world upside down! — Description from novelcodex.org