A breathtaking portrait of a female valkyrie gracefully descending with the aurora borealis illuminating the background, showcasing intricate and highly detailed features. Her beauty is captivating, with precise lineart capturing every facet of her ethereal presence. The scene is vibrant and cinematic, inspired by the style of Bastien Lecouffe-Deharme, enveloped in a mesmerizing volumetric atmosphere against the midnight sky. The composition is centered and flawless, free from any errors, with a focus on perfect anatomy, ensuring no extra or missing limbs. The portrait is clear and well-defined, avoiding any artifacts or distortion, and maintains artistic integrity without any distracting text, watermarks, or signatures.