A surreal, epic dark-fantasy cinematic photograph capturing a demonic samurai warrior riding a blazing horse at full gallop across a dark hillside at dusk. The samurai wears intricate black traditional armor and a terrifying red Oni mask with prominent curved golden horns, with a mane of bright, crackling fire erupting from the back of his helmet. The horse's entire silhouette—including its head, mane, back, and tail—is completely engulfed in brilliant, roaring white-hot flames that illuminate the dust kicked up beneath its hooves. Set against a dark, minimalist hillside under a deep indigo twilight sky, the composition creates an intense, fiery contrast against the shadows, delivering a raw, powerful, and ultra-realistic mythological aesthetic with a heavy, gritty analog film grain.