By activating their Ketsuryugan, the user locks them within a genjutsu for one of the various purposes. They can brainwash them into mindless drones with a set order to follow and trap them into a dream like state. For more defensive mean’s, this technique can create a powerful barrier against the mind reading, protecting information from the being acquired. Only another equally powerful dojutsu-user can break through and the repel this mental trap.