A formidable demon encased in intricate armor with chains draped across his robust frame, exuding an aura of dark magic. His commanding presence is accentuated by flowing cloaks of deep black and crimson hues, fluttering ominously. Instead of a traditional head, a swirling sphere of fiery red energy crackles and pulses with power. The scene is rendered in stunning 4k ultra-realistic detail powered by the capabilities of an advanced graphics engine, evoking the epic fantasy essence of worlds akin to Lord of the Rings and Dungeons and Dragons. Subtle flashes of arcane energy dance along the armor’s surfaces, illuminating the fearsome being's presence amidst an ancient, shadowy landscape.