Soul Summon

Soul Summon is specifically designed to summon the wraiths of the Shinigami clan. Each person that gets a wraith contract is then given a set of 4 hands seals that allows them to contact their wraiths only in combination with their chakra mixing with their own blood to activate the summon. Upon the chakra infused blood falling to the ground, it would cause the wraith to come crawling from the depths of the ground.

 The amount of wraith/s that are able to be summoned is equal to the Shinobi Rank of the character.