Master Dominus

Dominus was a Jedi master who lived around 4000 BBY, during the time of the Sith War. He had a padawan named Zona Luka, whom he trained to be a successful Jedi.  
 
However, Zona Luka was later possessed by a Sith Spirit, during Exar Kun’s rule. Dominus and Zona engaged in lightsaber combat. Zona managed to wound him lethally, but Dominus unleashed force-lightning upon her and killed her, before himself dying.  
 
His body was later found by three Jedi, Qrrrl Toq, Shoaneb Culu and Dace Diath.