After the Whole Building Was Killed, I Relied on the Lifespan System to Solve the Mystery

[Pseudo system] [Not invincible] A strange video hit my head, and a building turned into a slaughterhouse for evil spirits. The world is full of evil spirits, and the resurgent ghosts are harvesting human lives everywhere. My only reliance is an exchange system that uses longevity dollars as currency. Lose your life and get a glimpse of the murderous intentions of ghosts; spend the rest of your life in exchange for a solution to the problem. In the never-ending terrifying crisis, use your life to bet on a way out.