A stunning 8k ultra realistic image of a terrifying demon resembling the Night King from Game of Thrones, envisioned by George R. R. Martin. The full-body depiction showcases intricately designed purple and blue neon-infused armor, adorned with ornate details. The atmosphere is enhanced by cinematic lighting that casts dramatic shadows, bringing the character to life. The scene is trending on Artstation, presented in 4k hyperrealistic quality, with a sharp focus on high-detail elements. Rendered in Unreal Engine 5, the cinematic composition captures a chilling intensity with vivid clarity, set against a moody backdrop.