Dark Fantasy Samurai Battlefield

A dark fantasy anime illustration of a lone swordsman on a desolate battlefield under a giant blood-red moon. The character has long dark hair in a messy high ponytail, glowing red eyes, and wears tattered black traditional clothing while holding a katana angled downwards. In the background, a ruined Japanese castle looms amidst dark, swirling clouds. The scene includes 3 prominent tattered banners with Japanese kanji planted among shadowy debris. The lighting is cinematic and ominous, utilizing a color palette of deep blacks and intense crimson reds.