Ten Thousand Moments of Dread

This genjutsu is the personal creation of Genjiro Hirosame, the leader of the Death Guard.

Usage
While concentrating chakra, Genjiro can make anyone relieve the pain of people they've wronged in the past. The victim is trapped inside the wronged person's body and is able to feel anything it happened to them, with every sensation greatly amplified. Because of the sensory overload, this genjutsu can render someone mad or possibly kill them. This technique gained Genjiro the nickname "The Storm Demon".

Counter
This technique is almost impossible to counter but if someone can ignore the augmented feelings, can break this technique like any genjutsu. However, using this method requires great will. Also, the technique ends if Genjiro stop focusing chakra.