Rule of One

"Instead of two there is now only one&mdash;the Sith Order itself. I have recreated the Sith, Lord Bane, as you once did. I have given it a purpose. For what use is power without one?"

- Darth Krayt to Darth Bane's holocron

The Rule of One was the guiding principle of the Sith in the new Sith Order.

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&mdash;that One being the Sith Order itself, under which there would be many minions, acolytes and lords with only one Dark Lord of the Sith.