孤獨的忍者身著黑衣，立於濕滑屋頂，背景是月光下的城堡與山巒

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Create a dark cinematic full-body portrait of a lone ninja shinobi standing on a wet stone rooftop at night, centered and facing forward in a powerful still pose. The figure wears layered black Japanese shinobi clothing: loose hakama-style pants, wrapped forearms and calves, tabi boots, a tied waist sash with hanging fabric strips, crossed chest straps, and a dark scarf or cloak with long torn ribbons blowing to the right. A sheathed katana is strapped diagonally across the back, with the handle visible over the left shoulder. The face should be intentionally obscured in deep shadow, unreadable and featureless, while messy black hair is rim-lit by moonlight. Background: a misty feudal Japanese castle town with tiled rooftops and pagoda silhouettes fading into fog, a bright full moon on the upper left behind thin clouds, stormy blue-black sky, low drifting smoke, and distant mountain shapes. Style: ultra-detailed dark fantasy realism, moody samurai/ninja concept art, dramatic moonlit rim lighting, high contrast, wet reflective stone textures, desaturated navy and charcoal palette with subtle silver highlights. Composition: vertical 9:16 poster crop, full body visible from head to feet, low-angle heroic framing, subject occupying the center, atmospheric depth, no text, no logo, no extra characters.