Keitsurugi

The is a one of the three special longswords specially made by Jigamaru Yazuna, along with the Enchōken and the Mimizusori. The Keitsurugi was given to one of his three children, Tekuguchi, while the other two, Enchōken and Mimizusori, were given to his other brother and sister, Tekumaru, and Tekusora respectively.

Appearance
Keitsurugi takes the form of seemingly a normal longsword, with a bronze hilt and a "silver" blade, which is small near the hilt and gets some what thicker as it extends. Additionally, going right through the blade itself, is a thin straight cut.

Abilities
In actuality, the silver blade is made of a metal that has chakra-malleable properties, meaning it can be shaped or bent to nearly any shape. The cut is actually supposed to allow the wielder to use their chakra to shape this "two bladed" sword into somewhat like scissors. Using this to their advantage, it allows the wielder to "open" the blade like scissors, and when something is between it, cut it with force. Because of this, it was used a lot to decapitation, hence the name, "Beheader's Shears".

A downside is that when it snips, the two "blades" meld together, and takes an average of 6 seconds to separate it as if it was before sniping. Additionally, because it responds to chakra, anybody's chakra, including the enemy's can manipulate the blade of the sword. Despite that however, a chakra of a person that the metal is not used to has a harder time manipulating the metal, which Tekuguchi realized in the beginning.