Cultivation Is a Big Pit

What should we do when the spiritual energy of a world that cultivates immortals is about to dry up? This is an era where cultivators are deceitful, monsters are lingering, demons are mysterious and unpredictable, and mortals are rising. A protagonist who can even travel through time while reading is faced with the lack of immortality skills and a hopeless path to immortality. He is wanted at the beginning, turns to undercover, and becomes a big winner step by step.