Darth Xylith

Darth Xylith, born Omec Aldan, was a human male Jedi Master who later fell to the dark side of the Force and became a self-proclaimed Dark Lord of the Sith, taking the name Xylith. A padawan of Dooku, Xylith reached the rank of Jedi Master at the age of 37. After leaving the Jedi Order, he lived in isolation on Onderon where he eventually came into the possession of a Sith scroll. He was driven mad and became obsessed with the dark side, declaring himself a Dark Lord of the Sith, eventually taking a Dathomirian Nightbrother later known as Nebulous to become his first apprentice.

Born in 80 BBY, Omec was taken at a young age to trained by the Jedi Order after being identified as Force-sensitive. A Padawan of Jedi Master Dooku, Omec learned the ways of the force and became an exceptional duelist. Much like Dooku's other Padawan's, Qui-Gon Jinn and Rael Averross, Omec was known to question the Jedi Code. He eventually attained the rank of Jedi Knight and take on a Padawan of his own, Ral Morid. Omec later went on to reach the rank of Jedi Master, taking part in many diplomatic and peacekeeping missions. Omec eventually grew too disillusioned with the traditions of the Jedi Order and growing corruption, and left the order with a group of other Jedi Masters later known as the Lost Twenty.

After leaving the Jedi Order, Omec went into isolation on the jungle planet of Onderon. At one point, he discovered a cave containing a Sith scroll along with multiple other Sith artifacts. Omec studied these scrolls and drove himself mad, becoming obsessed with the Dark Side of the force. Increasing his powers through practice & experimentation, he declared himself the true Dark Lord of the Sith adopted the name Darth Xylith. He spent time travelling the galaxy in search of more Sith artifacts to gain more knowledge, before eventually arriving on Dathomir in 22 BBY in search of someone to take as an apprentice to pass on his knowledge. He came across a young Nightbrother who he sensed was very strong in the force, and proved himself very skilled during a combat trial. Xylith would take in the Nightbrother as his apprentice and (illegitimately) gave him the name Darth Nebulous. He was a strict and brutal master, torturing his apprentice for failure & extensively training him in the Dark Side as well as lightsaber combat. Over the years, Nebulous became immensely powerful and began to form his own ambitions, much to the distaste of Xylith, who wanted to remain patient expanding his knowledge before making any moves. Xylith saw this as a threat to his power, and went back to Dathomir to recruit a new, young apprentice, later known as Kaabal, with the plan to train him in secret and kill Nebulous with in time. This plan backfired, and Xylith met his demise when Nebulous found out about the secret apprentice, killing Xylith in a brief duel.

Early Life
Xylith was born on Coruscant as Omec Aldan in 80 BBY at the end of the High Republic Era. Born to a high-class family, he was identified as Force-sensitive at an early age and brought to the Jedi Temple for training.