Nakagogan

The Nakagogan is a unique Dо̄jutsu that was awakened by the Third Crescent Samurai Shihasu Taisei. Years of chakra surging through her blade and back into her lent to the creation of a combination of two unique chakra sources, the chakra in her sword having been mutated as it lied within the blade. This mutation led to the awakening of the Nakagogan in her left eye, and with it, a new way to manipulate the chakra in her swords even further, and even being capable of creating this mutated chakra to course it into any chakra sensitive weapon. This allows her to manipulate the entire physical structure of the weapon. Depending on how much chakra is sent into the weapon, she can transform it into any size and shape as long as it has a blade. From a weapon as small as a dagger to something as large as Kubikiribōchō, Shihasu can make the weapon into whatever she wishes it to be. All that's required is she has enough mutated chakra to manipulate the shape of the weapon.