Time-Release Technique

By placing a mark on a person, this technique will activate as timed even if the person is tortured or put under a trance. This is meant to catch an enemy when their guard is down. Sai mentions that this is used as a last resort technique by the ANBU. When Kakashi requested Tsunade to use it on him, the technique would activate Kakashi's Mangekyō Sharingan.