A colossal, obsidian-black warhorse, muscles rippling under a coat like polished night, stands silhouetted against a tempestuous, apocalyptic sky. Astride it sits a fearsome, horned warlord, clad in blackened, spiked plate armor that seems to absorb the surrounding light. He grips a massive, blood-stained battle axe, its blade catching a sickly, molten orange glow emanating from a raging inferno licking at the scorched earth beneath the horse's hooves. The atmosphere is thick with ash and supernatural energy; spectral, bat-like wings drift through the turbulent, bruised-purple and sulfur-yellow clouds above. Dramatic chiaroscuro lighting, hyper-detailed oil painting, epic fantasy, cinematic composition, Greg Rutkowski meets Frank Frazetta.