A highly detailed 8k ultra-realistic depiction of a terrifying demon inspired by the Night King from Game of Thrones, created in collaboration with George R. R. Martin. The full body is adorned with intricate armor that shimmers with purple and blue neon accents, showcasing ornate craftsmanship. The scene is illuminated with cinematic lighting that accentuates the hyperrealistic textures and shadows. This artwork is trending on ArtStation, presented in 4k resolution, with a focus on capturing high details and atmospheric depth. Rendered using Unreal Engine 5, the imagery conveys a dramatic and immersive experience -- presented in a 9:16 aspect ratio, maintaining a balanced quality with subtle creative enhancements.