Lone Swordsman Under Blood Moon

A dark fantasy-style anime illustration depicting a lone swordsman standing on a desolate battlefield, with a huge {argument name="moon color" default="blood red"} moon above his head. The character has {argument name="character hair" default="long black hair with messy high ponytail"} and glowing red eyes, dressed in tattered traditional black clothing, and wielding a downward-tilting {argument name="weapon" default="Katana"}. In the background, a {argument name="background structure" default="Ruined Japanese Castle"} appears faintly in and out of the dark, surging clouds. The scene features three dilapidated flags planted among shadowy ruins, each printed with Japanese kanji. The lighting effects have a cinematic texture and an ominous atmosphere, using a color scheme with {argument name="color palette" default="Deep Black and Deep Crimson"}.