Prompt: /dream prompt:The cover of the Lost City adopts a mysterious and enigmatic dark color palette. Through a veil of mysterious radiance, it outlines the silhouette of ancient ruins. Weathered and peculiar, the ancient architectural elements bear witness to the erosions of time, as if they are witnesses to history. Adventurers traverse the city ruins, witnessing the fragmentation and silence of ancient structures. Strange sculptures and symbols in the city hint at the mysterious power of the Lost City. The overlapping effects of time and space on the cover create a sensation of traversing through time, allowing viewers to sense the city's existence across multiple eras. The overall scene exudes an atmosphere of an unknown realm, leaving ample room for imagination and sparking the reader's curiosity about the profound history of the Lost City.