The Fushigiri is a legendary katana with a slightly curved, single-edged blade, featuring a dark, almost black steel finish that absorbs light rather than reflecting it. The blade is adorned with faint, glowing red kanji inscriptions along its length, suggesting a cursed or mystical origin. The hilt is wrapped in aged, blood-red silk, with a tsuba (guard) shaped like a demon's maw, intricately carved to appear as if it's consuming the blade.