A full-body hyperrealistic depiction of a fearsome demon inspired by the Night King from Game of Thrones, designed by George R. R. Martin. This ultra-detailed 8k image showcases the demon in intricate neon armor with mesmerizing purple and blue hues, shimmering in ornate patterns. The composition benefits from cinematic lighting that highlights the demon's menacing presence, rendered with stunning clarity in 4k resolution using Unreal Engine 5. The piece is trending on ArtStation for its breathtaking detail, with a chilling focus that brings the character to life, set against a dramatic and atmospheric backdrop.