Vrad Adharan

Vrad Adharan was a scientist who worked in Tatooine during the age of the Galactic Federation Triumvirate. After being accused of performing inhumane experiments on Jawas, he went hiding in the Unknown Regions, where he secretly continued his investigation on local races. 
After a succesful experiment he managed to greatly expand his life expectancy, but it came with a cost, as his face and body suffered brutal disfigurations and scars, which he hides in a plague doctor mask. After the recent political upheaval in the galaxy, he plans to finally come out on hiding and continue his research.
Seeking to become a force-user he came across the journal of the late Darth Plagueis, an ancient Sith lord who almost managed to manipulate his midi-chlorians to achieve immortality. To continue his investigations, Vrad needed to find force-users´ bodies, but those were hard to find...
...Until 149 A.B.Y., when almost all New Jedi Order members were slaughtered by Darth Pinnacle. When he heard the news, Vrad arrived discretely in the planet and stole some of the Jedi´s corpses. Among the recovered bodies were Jiopo the Hutt, Ashrruk, and Karln Vekk. After months of experiments, he managed to build a machine capable of injecting midi-chlorians into a person´s bloodstream. Fearing the machine´s lack of safety, he looked for a lab rat, a person ambitious (or desperate) enough to check if the process worked, he found exactly that in a young orphan named Ryam Xemo.
The experiment was successful and Ryam became force sensitive, but there was a side effect, inexplicably Vrad gained a partial control on Ryam´s mind. Intrigued, he tried to have Ryam captured, but he managed to escape.
After that, he returned to the Unknown Regions and settled on the planet Repyv, where he was greeted by the ambitious Rayxion Serpynn, the planet´s ruler. With the king´s help Vrad modified the machine and persuaded (or forced) people into participating in the experiment, making them force users that were completely loyal to Vrad, considering him a deity.
Vrad and Rayxion´s army managed to conquer the nearby territories after a war that lasted from 157 A.B.Y. to 161 A.B.Y., during which Rayxion was killed, leaving Vrad the sole ruler of the newly formed Brightstar Territories with its capital in Nevaeh, the wealthiest planet in the area.
During the next 28 years, Vrad had ruled as a tyranical monarch who demanded to be considered little less than a god. The few people who dared to oppose him were thrown to the execution arena, located next to the castle.
In 189 A.B.Y., Darion, the exiled son of the late Rayxion, returned to Nevaeh and fought against Vrad in his royal palace. During the battle Vrad fell to execution arena.
Weakened by the fall and the previous battle, Vrad couldn´t do anything to stop the beasts that were roaming the arena, as the God-King died screaming devoured by the beasts he had bought in the arena he had built to watch his enemies´ suffering.
His death finally freed the Serpynn from the possession they were given, although they retained their force powers. Some of them, lead by Ryam Xemo, exiled themselves seeking penance for the things they had done under Vrad´s control. Others chose to continue following Vrad even after his death, becoming half pirates half religious fanatics who vowed to prepare for "God´s Second Coming".