Subokiruken

The Subokiruken (Sue-bow-ker-ruec-ken) is a legendary katana belonging to the Yokota Clan. Its creator, origins, or materials are unknown, but something known about the katana is that it shatters blades. It's often called the Imperfection Killer because of its destructive prowess in exploiting imperfections in other weapons. It features a jet black blade when unpowered. Its handle is colored in gold metal, while the wrappings around it are colored white and black. Its sheathe is colored gray.

Background
The Subokiruken makes its first appearance after Eiji Yokota found it resting in its sheathe by a riverbank near a shrine. Although nothing was contained in the katana, it resonated energy and aura. As Eiji opened the sheathe, its black blade gave a gold color. During its time, it sliced through blades like butter and offered supernatural powers. To this day, it is still feared and told through tales.

Phases
The Subokiruken takes three phases depending on how much the user is willing to sacrifice after a period of time. The blade will only be fulfilled once the necessary sacrifices are made.

First Phase: Awakening
The Subokiruken awakens as the user sacrifices their aura to power the blade. The katana is now capable of deflecting and blocking effeciently.

Second Phase: Hunger
The Subokiruken fills with energy from the user's aura. The longer this phase is used, the more aura is taken away. The katana's powers multiply and is now able to slice through blades.

Third Phase: Breath
A new ability can be used to manipulate the Subokiruken, breathing. A simple long exhale through the mouth increases the blade's speed and introduces stances like the quick draw or the death rattle. The longer the exhale, the more powerful an attack would be. A user with strong lungs can pull off the most vicious and craziest attacks. This phase requires blood sacrifices to use.