Sword of Yuki

A very special bright white sword Shiguma had created by a blacksmith, during his time as a Jōnin. He decided himself, that he needed a special weapon for battle. A trademark. He asked for something special, and named it after his clan.

This weapon is a perfect tool to go with his Ice Release. When he holds it, his Ice Release chakra automatically flows through it. When an opponent is attacked with it and the attack lands, after effects begin to take place. If any part of the blade cuts the opponent, or get's in the bloodstream of the opponent, ice begins to freeze the opponent from the inside, with frostbite. The limb that is hit, becomes frozen, and will need immediate amputation. The special part about this sword is that the ice that enters the bloodstream with continue to spread through opponent's entire body, until they are frozen from the inside out. The ice will freeze the insides, then come out of exits, and freeze the outside of the body as well.

The other part of this, is that the sword is extremely hard to break. It was made from a white diamond, that you can't see through.