Force Sever was a rare technique that made a force user unable to connect with the Force. Its use was most well known among the Jin'ha, who had learned it as part of a deal with a Dark Jedi, who had created it. Once this power was utilized, it was very, very difficult to reverse. Only some of the most accomplished Consulars, such as Jensir Tahn were capable of helping a force user to regain their ability.