Dark fantasy illustration style, corrupted knight, armored figure in tarnished plate mail, spiked crown, glowing red eyes, tattered crimson cape, holding ornate sword dripping, ominous aura, gothic architecture elements, ancient stone corridor, full-body portrait of menacing warrior, shadowy arched hallway in background, imposing armored figure in foreground, dramatic low-key lighting with red accent glow lighting, dark metallic and red palette.