Mermaid with a Rune-Bound Treasure Chest

digital art fantasy masterpiece. Cinematic film still. Best quality. Hyper detailed. A pirate's treasure chest, heavily adorned with glowing runes and ancient nautical symbols, rests on a vibrant multiucolored coral reef. Schools of vibrant colorful bioluminescent fish swim around it, casting an eerie light on the scene. Nearby, the silhouette of a wrecked ghostly galleon, sails in tatters drifts through the murky water. A breathtakingly beautiful mermaid with a long graceful tail holds the lid open and reaches for the glowing contents. Her beautiful golden impossibly long hair drifting in unseen currents, seaweed waving in the currents and light filtering from above casts a surreal, otherworldly feel., rendered in a dark fantasy style with cinematic lighting and a deep, atmospheric underwater effect, heavy grunge impasto.