Originally Posted by Darth Nihilus's History
Darth Nihilus, the Lord of Hunger, was a Dark Lord of the Sith in the time after the Jedi Civil War. An apprentice of Darth Traya, he was one of the few survivors of the Battle of Malachor V and one of the three leaders of the Sith Triumvirate. He was a shadowy figure that wore a red and white mask and was dressed in long black Sith robes that covered his body.
Darth Nihilus, a living vacuum, consumed the Force from Force-sensitives in order to stay alive. He even consumed entire Force-sensitive planets. In addition to his terrible hunger, Nihilus wielded a lightsaber, and fought in a one-handed aggressive style.
Almost nothing is known of the true beginnings of Darth Nihilus, other than the fact that he was a survivor of the Mandalorian Wars. Although his role in the wars is a mystery, it is very likely that he may have been one of the Jedi that defied the Jedi Council and followed Revan to war. After the war, he was found by Darth Traya to be Force-sensitive, and she began training him in the ways of the Sith at the Trayus Academy on Malachor V. Disagreeing with his mentor's teaching methods, Nihilus, along with his fellow apprentice Darth Sion, plotted and turned against their dark mistress. They cast Traya down, stripped her of her power, and expelled her from the Sith Order, becoming Dark Lords of the Sith, and they, with their combined armies of Sith Assassins and Sith Followers, allied with other Sith Lords some time after. Darth Nihilus, Darth Sion, and their combined Sith armies then begun their shadow war against the remnants of the Jedi, hunting the Jedi to the brink of extinction.
Darth Nihilus ravaged and consumed whole worlds from his flagship, the Ravager, in order to feed his insatiable appetite for power. Nihilus's powers were so all-consuming that all those who came into contact with the Sith Lord became slaves, mindless servants to his will. It is possible that he drained the Force from these formerly living beings to enslave them.
One servant of Nihilus was Visas Marr, a female Miraluka from Katarr, a planet consumed and destroyed by Nihilus. The Sith Lord sent Visas on a mission to find and bring the last of the Jedi before him, so that he could consume her power and essence. However, this would be the Sith Lord's undoing, for the Jedi Exile broke Visas free from Nihilus's bonds, and she turned against her former master.
Darth Nihilus's redemption at the hands of the Jedi Exile.