Darth Drakenaereus

Darth Drakenaereus, or Katlark Danada was born on the planet of Alazir, which was a Sith base at the time. His mother was a Human and his father was an Alazirian. His father was a proclaimed Sith amongst the hordes of current Dark Lord Evxa-Uun and taught his son the power of the darkside. Drakenaereus is the main villian in Star Wars: Knights of the Old Republic IV.

The Sucession of Evxa-Uun
When Evxa-Uun died on [[Lehon], Katlark suceeded him at age sixteen. His new mantle as Dark Lord offered him many powers, and he instantly order immediate attacks on the Jedi and their outlying planets. When Katlark's father was slain during a Sith campaign, he ordered his slaves to bury his remains in the Alazirian Valley of the Dark Lords.

The Jedi Wars
As a cruel punishment for the Jedi's murder of his father, Drakenaereus ordered every Sith to unite under his rule and begin their assault on the Outer Galaxies and the Outer Rim. His strike on Greedin was cruel and unexpected, leaving the planet shattered. The war raged on until the final battle took place on the storm world of Destudii, ending in Jedi victory.

Death
When his forces became clearly destroyed, Drakenaereus fled to a Sith temple and defended himself there. Jarn Durandu came to confront him himself, but was forced to battle his own misled sister. Jarn Durandu defeated her and then dueled Drakenaereus, only ending in the demise of the Dark Lord.

Alternate evil ending
If the player chooses to be evil, he defeats his sister and kills her. Then after defeating Drakenaereus, becomes Dark Lord of the Sith.