The World's Cemetery, I Rely on Lies to Save the World

Rial, a modern social animal who is afraid of death and loves to fool around, travels to this western fantasy wasteland where Cthulhu is rampant. He just wants to be a salted fish and survive. However, when he and Gu Qingfeng discovered the symbols of pre-era civilization in a cave, with in-depth research, they discovered that this was not an ancient civilization, but a civilization and technology that transcended the times! However, his fantasy was completely shattered - the world had been destroyed long ago, the gods had fallen, and the current "jobbers" were just hanging on. So how can they continue to survive in this world's graveyard.