Darth Night Bane

"("You, Draxues, Bane of the Night.....have slain your master.....what do you wish to be called now?" "Your name is fitting i believe, then i shall take it as my own,from this day on I am Darth Night Bane. And i will usher in a new age of darkness for the galaxy!)"

 was a Sith... (expand and explain)