Living Souls Exchange (生き血御霊写し, Iki Mitama Utsushi) is a secret skill of the Shinmei-ryu School of Swordsmanship. Normally, it is used during the process to remove an evil spirit from a person that is too weak to handle the operation. The person's spirit would be removed from the weak body and stored in a healthy one. Allowing the exorcist to destroy the evil spirits in the weak body without needing to worry about the strain that it may put on the person's weak spirit.