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A massive sword that belongs to the Seven Ninja Swordsmen of the Mist.
The Executioner's Blade has been called many names throughout both series and has been wielded by Zabuza, an unnamed member of Tenzen Daikoku's gang, Suigetsu and eventually Kakashi Hatake during the Fourth great Ninja War.
The unique attribute of this weapon is its ability to regenerate from scratches and nicks by absorbing the Iron from the blood of its victims, making it very dangerous against groups of foes, as it can get stronger as the battle goes on.
Part I
The sword is yielded by the swordsman of the mist Zabuza Momochi, Naruto's first major foe. After Zabuza's death, the sword was placed at his grave and left there. In the Anime Version, a member of Tenzen Daikoku's gang took the sword and wielded it.
Part II
Suigetsu of Taka returns to claim the sword, forcibly claiming it from the gangster, while in the manga, he removes it from the grave, and wields it in battle. However, it takes damage against Killer Bee, and does not regenerate, and gets snapped in half when facing Bee's bigger brother, A. after being captured by the Samurai of the Land of Iron, Suigetsu loses track of the balde.
The blade appears with a Resurrected Zabuza, who cuts down multiple opponents to restore it during the Fourth Great Ninja World War.He then fights and wounds Kakashi, who was immobilized with Haku's body, in an identical manner to how it occurred in their first encounter four years previously. however, Zabuza was able to be sealed, and the sword was last seen in Kakashi's hands, who claimed he was about to go on a rampage.