A battle-ready uchigatana forged by Sengo Muramasa, the founder of the legendary Muramasa line. The blade's reputation for bloodlust is well-earned—it's genuinely fearsome in a fight. His behavior tends toward the mysterious and unpredictable, which fans often attribute to centuries of being treated as a demon blade by those who've encountered him. Tonbokiri, another sword from the same Muramasa workshop, watches him with obvious concern, though whether that's about his nature or his methods isn't entirely clear.
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