The jutsu consisted of Ryun gesturing with his hand and mentally reaching into the victim's mind, forcing them to relive all the worst memories of their life, both painful ones and ones that were merely embarrassing, over and over and over again to the point where it almost seemed to cause physical pain. Interestingly, Ryun found that after a brief session of torture, the subjects demonstrated a slight increase in intelligence and efficiency after they recovered. At extreme intensities this genjutsu could kill the victim.