Dark fantasy demigod, adult male, tall and extremely muscular build, pale ash-gray skin, long black hair, pointed ears, glowing violet eyes with a third eye on forehead, calm dominant expression, standing frontal pose, multiple massive shadowy arms emerging behind him, ornate demonic armor with gold filigree, skull motifs, arcane jewelry, purple gemstone core at waist, ritual halo sigil floating behind head, dark fantasy concept art, high-detail digital painting with baroque and gothic influences, centered symmetrical composition, medium-full shot, slightly low-angle to emphasize authority, dramatic low-key lighting, cold top light with violet accent glow from eyes and gems, deep shadows with selective rim lighting, color palette of obsidian black, bone white, muted steel gray, royal purple, hints of antique gold, ominous divine and eldritch mood, godlike presence and quiet menace, dense painterly textures, organic shadow forms, subtle mist and particle haze, cinematic contrast, ultra-detailed rendering, matte finish, epic fantasy key art, 4k quality