A formidable demon clad in intricately detailed armor, draped in flowing black and crimson cloaks, emanating an aura of dark sorcery. From its head, a pulsating orb of red energy radiates a sinister glow. This fearsome entity, resembling a fusion of Middle-earth's shadowy warlords and the cunning villains of Dungeons and Dragons, stands in 4k ultra-realistic detail, as if rendered in the most advanced graphics engine. Chains clink ominously around its form, enhancing the sense of dread, while the air around it crackles with the power of forbidden magic.