Darth Mallus

Darth Malus was once the apprentoce of a clone of Darth Revan, who he muredered to take his place; as the apprentice Darth Nihilus (II). He served his master through many battles throughout the new war. However when his master was wounded by Jedi Knight Jaden Kanos, Malus took the opputunity to murder his second master. With this act Malus became "Dark Lord of the Sith".