A breathtaking Japanese anime-style illustration of a young female elf mage floating in the air, casting a massive spell from above on the demon army. She is depicted from behind, wearing an opulent Western-style legendary mage robe adorned with lavish magical embellishments. Her long, flowing silver hair cascades down as she hovers high above the battlefield, her hands raised to channel a dazzling display of magic. The scene captures the grandeur of her powerful spell, with vivid magical energies swirling around her and the dark forces below, overwhelmed by her formidable magic.