ethereal fantasy concept art of  fantasy, epic, mysterious, movie poster-style illustration, a majestic fantasy castle suspended in the air, grand and majestic, the castle is suspended in the air, surrounded by clouds, the castle should be depicted in vibrant and rich colors to emphasize its grandeur, the surrounding clouds can have softer, with a dynamic and magical background, glowing runes, masterpiece, best quality, high quality, highres . magnificent, celestial, ethereal, painterly, epic, majestic, magical, fantasy art, cover art, dreamy