A highly detailed 8k ultra-realistic depiction of a terrifying demon inspired by the Night King from Game of Thrones, conceived by George R. R. Martin. Showcasing a full-body view, this menacing figure is clad in intricately designed purple and blue neon armor, with ornate embellishments. Captured with cinematic lighting that highlights its menacing features, the scene is trending on art platforms like ArtStation. The focus is on hyperrealistic textures and high details, rendered using Unreal Engine 5 for a cinematic effect -- a vertical composition that immerses the viewer in its ominous presence.