Rule of One The Rule of One was the name of a Sith doctrine developed by Darth Krayt and followed by the One Sith . Darth Krayt ' s doctrine , as followed by the One Sith focused , in stark contrast to the core tenets of the old Sith , on obedience rather than conflict and survival of the strongest , with many Sith following one leader and purpose . Overview . When Darth Krayt founded his new Sith Order , he abolished Darth Bane ' s Rule of Two , a dictate which commanded that there should be only two Sith at any one time ; a master and an apprentice , one to embody the power of the dark side , the other to crave it . Instead , there would be the Rule of One — that One being the Sith Order itself , under which there would be many minions , acolytes / adepts and lords with only one Dark Lord of the Sith . Darth Krayt believed he gave the Sith and their power a purpose , unlike Darth Bane who believed that power was its own purpose . Under the Rule of One , the followers of Krayt were taught blind obedience and absolute loyalty to the Dark Lord of the Sith , instead of the plotting and infighting of previous Sith organizations . Similarly to the Jedi Order , Sith Masters trained a single apprentice . However , after their training was completed , apprentices were required to slay their Masters as a test of their allegiance to the Dark Lord , just like in the past Sith Order acolytes were required to kill someone to whom they were attached or close to seal their transition to the dark side . Masters who deemed their apprentices ready would allow themselves to be killed , as long as it was on Krayt ' s orders . The new Sith also mirrored the Jedi in that , while they did rely on passion , hatred and aggression , they did not seek power for themselves alone , but to serve the will of the Dark Lord and impose his order on the galaxy by any means necessary . Instead of reducing the number of Sith to prevent the Order from destroying itself , Krayt altered the Sith philosophy . He claimed he gave power purpose . With the numbers as great as they were before the previous Rule ' s establishment , it allowed the Sith to match up in numbers with the Jedi . But the ancient image of Bane insisted that the Rule of One would be the Order ' s downfall and it would turn on Krayt . This would eventually prove true , for in Krayt ' s quest to sustain his life , several of his followers began to question him . In order to ensure Darth Krayt ' s vision of a galaxy united under the rule of the Sith , Darth Wyyrlok III assassinated the Dark Lord as his quest to heal himself had distracted Krayt from his own plans , which Wyyrlok intended to carry out in his place . However , contrary to Bane ' s prediction , Darth Krayt was not finished , and was able to revive himself with his knowledge of Dark transfer gleaned at the edge of death , making himself whole . Challenging and slaying his usurper in a duel for control of the order and his strength proven to the Sith , Krayt resumed leadership of the One Sith unchallenged . He refocused his efforts continued the One Sith ' s vision of a united galaxy ; this time through war and destruction , until he met his true death in the Battle of Coruscant . Upon Krayt ' s death Darth Nihl assumed control of the One Sith as the new Dark Lord and , in accordance with the Rule of One , followed him as he ordered them into the shadows once more .