Split Soul Katana

The Split Soul Katana was a cursed tool used by Toji Fushiguro. Maki Zenin wields an exact replica created by Mai Zenin. It is a katana that bypasses all resistance and cuts directly at the soul.

Description
The Split Soul Katana ignores all physical toughness to cut through the hardest substances and strike directly at the soul of its target. Its full power can only be unleashed by those with eyes that can see the souls of inorganic objects. It is a valuable cursed tool worth five hundred million yen.

Toji Fushiguro
Toji used the Split Soul Katana frequently on his mission to assassinate the Star Plasma Vessel, Riko Amanai. During a fight with her bodyguard, Suguru Geto, Toji was swallowed by one of Geto's giant cursed spirits. Toji sliced and tore the worm-like curse apart from the inside using the blade until he escaped. The Split Soul Katana displayed its ability to bypass toughness by easily slicing apart the Rainbow Dragon, the hardest curse in Suguru's arsenal at the time.

Maki Zenin
When Mai sacrificed herself to save and empower Maki, she left behind an exact replica of the Split Soul Katana. It serves as Maki's last connection to her sister and the weapon she wielded to enact her promise to destroy everything. Maki destroyed the entire Zenin clan using the Split Soul Katana, starting by bisecting her father's head with a single stroke of the blade.

Dual-wielding it alongside the Dragon-Bone, Maki used the Split Soul Katana to annihilate the Kukuru Unit by slashing numerous men apart with a sword in each hand. She finished her rampage through the Hei by using the Split Soul Katana to sever Jinichi Zenin's head from his body. When Maki used the replica to eliminate the leftover members who were absent during her attack, only trace amounts of the cursed tool's cursed energy were left behind.

The Split Soul Katana has since become Maki's primary weapon. She used it in the Culling Game to clear out the Sakurajima Colony. It was also the primary means of injuring Naoya throughout her fight with his vengeful cursed spirit form. Her slashes only dealt minor damage to Naoya because she couldn't yet bring out the full potential of the blade. She severed his limbs and impeded his movements, but never dealt lasting damage that he couldn't immediately heal from.

Maki allowed Hagane Daido to borrow the katana and he was able to bisect Naoya's cursed spirit body with single, lightning-fast strokes of the blade. Maki's attacks didn't have the same effect because she couldn't see everything that Hagane could. Only once fully realized did Maki unlock the full strength of the Split Soul Katana. She cut through Naoya's body and soul in one strike, effortlessly defeating him inside his own domain.

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