A highly detailed 8k ultra-realistic depiction of a menacing demon inspired by the Night King from Game of Thrones, envisioned by George R. R. Martin. The character is portrayed in full-body with intricate, ornate armor featuring vibrant purple and blue neon accents. The scene is illuminated with cinematic lighting, creating an intense atmosphere. This hyperrealistic image is crafted in 4k resolution, focusing on high details and textures, using the advanced capabilities of Unreal Engine 5. The composition is trending on ArtStation and showcases a vertical orientation ratio of 9:16, with an engaging, cinematic quality.