Epic conquest scene with a warrior in full battle armor mounted on a monstrous steed, capturing an aura of horror amidst a dark and intricately detailed landscape. Imbued with atmospheric photography lighting, the composition is rendered with photorealistic and cinematic quality, featuring subtle cinematic noise. Using octane rendering techniques, the image is sharply focused and presented in breathtaking 8k resolution with hyperrealistic detail. Enhanced with VFX post-production and advanced RTX ray tracing for dramatic lighting effects, this artwork is perfect for platforms like ArtStation and CGSociety, showcasing a 9:16 aspect ratio.