Sealing of Souls

As the name describes, when used, you are literally sealing off someone's soul, preventing them from going to the afterlife, as well as sealing off their chakra (which is partially in their soul). This turns the victim into a lifeless being that can be used at one's disposal. The one downside to this technique is the amount of chakra it requires in order to be used on a person, and as it is used on more people, the seal can become weaker. Since the technique is so severe, it is registered in the Lost Tenrai Scrolls as a kinjutsu (forbidden technique).