Pushing the lightsaber in, Darth Uno felt no resistance. None in his hand and none in his heart. He had overcome his flaws a long time ago, the killing of his master was supposed to be a release of his worldly attachments. To kill one's own fear one must kill that which is feared. To kill ones love one must kill what he loves. The master of a Sith is both loved and feared. Loved for the power given, and feared for the power withheld.
Darth. The title of a Sith who has killed his master. By proclaiming himself Darth he proclaimed himself beyond the protection of the emperor. To murder him was no crime. No crime in the eyes of the Emperor perhaps but a Darth makes his own laws, and woe to those that would cross him.
Although the Emperor was powerful in his own right, his true power lay in his governmental body. To avoid having to fight every upstart Sith that wanted freedom, all one had to do was declare oneself a Sith and then you were no longer subject to his laws. He would kill you if he wanted to, but only if he wanted to.
To kill for one's own benefit was just. Everyone needs to look out for themselves. To kill just to uphold a set of laws was perverse. Human life was sacred, to throw it away for Ideals was perverse. It was like something the Jedi would do.
No matter in killing his master he would gain the respect of his peers. His master died for a good cause, furthering his own ambitions.
"Peace is a lie there is only passion, i have enjoyed our lie but now you serve my passion old master. Through your death your strength shall be added to mine, "
"Rise as my apprentice, Lord Dous and rejoice for our powers are joined. I have gained much power and have overcome my flaws. I have no attachments to anything and can do as i will. I am perfect, Come join your strength to mine and i shall teach you the ways of the Sith and together we shall have more power than you can possibly imagine.
Darth Dous felt nothing as the lightsaber entered his old master's body. Darth Uno had trained him well. His severing of worldly attachments gave him the strength to make hard decisions. Hard decisions that when made correctly would give him power.
Now that he was alone he would need someone to watch his back and act as an extra pair of hands. He couldn't trust any of the other Sith they all killed their own masters. They would kill him the second it was convenient. No he would have to find someone young and foolish. Someone he could mold. Someone he could teach to both love and fear him He would need to find an apprentice.