A hyperrealistic 8k full-body depiction of a menacing demon inspired by the Night King from Game of Thrones, envisioned by George R. R. Martin, adorned in intricate violet and azure neon armor with elaborate detailing, basked in dramatic cinematic lighting. The demon exudes an eerie presence, with high-definition detailing that captures every ornate feature, set against a backdrop crafted with Unreal Engine 5 for a polished, cinematic look. This highly focused and detailed piece, trending on ArtStation, showcases a fusion of dark fantasy and horror elements, capturing the essence of an imposing otherworldly figure.