Darth Malgus

Darth Malgus is a Sith lord who lived three centuries after Revan.

About him
For three centuries after Revan defeated and destroyed Vitiate, ruler of the true Sith Empire, weak Sith lords came to dominate the Empire, each eventually falling to another. This all ended when Malgus killed the last of these Sith, proclaiming himself emperor. His first act as emperor was the destruction of the Jedi Temple and the assault on Coruscant. He was trained as an apprentice by Sith lord Vindican.

In The Old Republic: The Wrath of Malgus
Malgus is the ruler of the Sith Empire. He destroyed the Jedi Temple, and he seeks to ultimately defeat the Jedi Order. He is opposed by a young Jedi trained on Tython.

Appearance
Malgus was a disfigured human male with a bald head.

Lightsaber
Malgus wielded a standard lightsaber with a red blade.