Able to possess and sap the power of its wielder, or if channelled correctly, provide immense strength and power at the cost of the wielder’s soul, the sword was responsible for turning the city of Kyoto into a sea of flame, it took the entire Shinmei-ryu school to defeat its wielder and seal the sword. Ending up as a family heirloom for the Urashima Family, who presumably guarded it, the sword was presented to Motoko Aoyama as a replacement blade for her Shisui katana. However, Motoko sensed the evil that the sword emanated and refused to wield it, instead Naru was possessed when she drew the blade to help Motoko in a battle against her sister, Tsuruko Aoyama. Fortunately the blade was sealed by Motoko before it could do much damage.