A formidable chained demon clad in intricately detailed armor exuding an aura of dark magic, his silhouette menaced by the striking contrast of black and crimson cloaks billowing around him. His head is a swirling sphere of fiery red energy, pulsing with power and casting an eerie glow. Amidst a 4k ultra realistic backdrop, this dark figure stands like a character from a fantastical world, blending the epic scope of 'Lord of the Rings' with the intricate lore of 'Dungeons and Dragons.' The ambiance is steeped in arcane mystery, with subtle elements of shadow and molten metal, hinting at ancient power and malevolent intent.