A malevolent armoured demon draped in flowing black and crimson cloaks stands imposingly, intricate chains clinking softly with every movement. A sinister aura surrounds him, emanating from a pulsing, fiery sphere of red energy that replaces his head. Dark magic crackles in the air around him as if alive. His presence evokes the epic scale and detailed craftsmanship reminiscent of fantasy worlds like Lord of the Rings and Dungeons and Dragons. The environment is captured in stunning 4k ultra-realism, rendered with cutting-edge technology akin to Unreal Engine, creating a scene that is both terrifying and mesmerizing. Subtle hints of ancient runes glint on his armor, whispering of long-forgotten curses and powers.