Demon Lord of Destruction

dark knight, chaos warrior, death knight, blackened plate armor, full heavy armor, horned helmet, demonic helmet, glowing red eyes, menacing posture, tattered cape, loincloth, battle-worn appearance, sentient greatsword, organic greatsword, flesh and bone blade, pulsating weapon, embedded demonic eyes in blade, writhing flesh texture on blade, screaming mouths merged with metal, heart-like pulsating core on pommel, exposed organs in hilt, gnarled bone guard, living tissue weapon, raw demonic energy, glowing unholy runes inscribed on flesh, runic inscription on pulsating metal, intricate skull motifs on armor, skull shoulder pads, skull knee pads, skull gauntlets, lava cracks in armor, internal fire glow from armor cracks, glowing red lines along armor joints, bioluminescent armor details, spiked armor, spiked shield on back with skulls, ruined medieval castle, burning fortress, collapsing fortified walls, distant siege, war-torn landscape, rocky foreground debris, charred rubble, battlements in flames, thick smoke clouds, fiery explosions in distance, dark stormy sky, dusk lighting, apocalyptic sky, grimdark, dark fantasy, epic scale, low angle shot, full body shot, dramatic lighting, chiaroscuro, red bioluminescence, firelight, strong highlights on armor and sword, smoky haze, highly detailed, intricate textures, gritty textures, concept art, digital painting, fantasy art, masterpiece, best quality, ultra-high resolution, 8k, ultra-detailed illustration, dynamic composition, sharp outlines, intricate details, dreamy purple tone, watercolor-like uneven brushworks, collaged background, retro manga style, Seinen manga style, fantasia, medieval