An old illustration style image with simple lineart, with clear colors and scraggly rough lines, historical colored lineart drawing of a A shimmering aurora-veiled citadel emerges from a bed of iridescent frost, its crystalline façade etched with luminous, swirling patterns that seem to capture the celestial music of the northern lights. Delicate, crystalline filigree adorns the citadel's sweeping archways and intricate bridges, casting kaleidoscopic shadows on the snow-encrusted ground below. Glimmering sapphire and amethyst crystals stud the citadel's towers, casting a mesmerizing web of color across the surrounding frosty wasteland, with wispy cirrus clouds drifting lazily across the pale, star-studded sky above.