"A detailed black-and-white line drawing for a children's coloring book, depicting an alien discovering a mystical cave filled with glowing crystals and hidden treasures. The scene features a curious alien with a round body and large, expressive eyes, standing in awe amid towering crystals that emit vibrant light. Some crystals are shaped like stars, while others resemble large, geometric formations. Scattered around the cavern floor are intriguing treasures like shiny coins, colorful gems, and ancient artifacts. The background reveals the cave's rocky texture and subtle details, such as dripping stalactites and glowing fungi. All elements are clearly defined with bold, clean lines, no shading or textures, and each object is complete without errors or mistakes, ensuring a fun and engaging coloring experience for children."