[Not invincible, survival, infinite, apocalyptic Cthulhu] Li Xuan, who pursues immortality but is about to run out of fuel because he cannot break through, is inadvertently pulled into a dangerous apocalyptic place: the world of Cthulhu full of unknown horrors. The good news is that he is about to die and has received a new body. The bad news is that his abilities are locked, and the world is completely beyond his knowledge. Terror, evil, and despair tightly wrap him. What exactly is this place, and how should Li Xuan struggle to survive and escape from this world where rationality has collapsed?