Pledge Spirit Crystal

Pledge Contract Crystals are magic items created by the first Hanzo and used by the Jinshin Clan.

Description
A magic item that allows other races to use spirit magic with poor conditions for spirit magic. According to Chiyome these artifacts were brought by Hanzo and form the basis of the ninjutsu arts. Ten

Appearance
They are diamond shaped crystals that fit in the palm of a hand.

Abilities
These crystals contain spirits and allow users to summon their power. The spirits uses the users as hosts which enables the latter to use spirit magic. Though they can only work if the user is compatible with the spirit.

Trivia

 * The items are a well-kept secret among the Jinshin Clan.
 * Only ten pledge spirit crystals exist. Though two have since be lost from the clan. Chiyome after searching the remains of Hanzo's first shrine managed to recover the ninth, while another was stolen by the humans of the Nohzan Kingdom and kept in their treasury as a trophy and later given to the Holy Hilk Kingdom. Sasuke had been on the trail of the artifact which resulted in his demise at the hands of the cardinals.