Darth Andeddu
this ancient Sith Lord placed a wealth of dark lore into a Sith holocron, which was entombed with him on Korriban when he died, many millennia before the Galactic Civil War. The holocron was later recovered by Quinlan Vos and Tol Skorr, who were vying for the favor of Count Dooku at the height of the Clone Wars. From inside the holocron, Dooku extracted a blood-red crystal that was once part of Darth Andeddu's lightsaber. He gave this crystal to Quinlan Vos, shortly before dispatching Vos to Coruscant to assassinate Senator Viento.