Holocron of Belia Darzu The Holocron of Belia Darzu was a Sith holocron created by Belia Darzu , a Dark Lord of the Sith who reigned during the last quarter of the New Sith Wars . A four - sided pyramid al device , the holocron contained Lord Darzu ' s knowledge of the dark side , particularly Sith alchemy and the techniques used to create her technobeast army . Following Darzu ' s assassination , the holocron remained inside her stronghold on the planet Tython , serving as the final vestige of her power . Centuries later , the holocron of Belia Darzu was recovered by Darth Bane , a Sith Lord who sought the secrets to constructing such a device of his own . Properties . Created by the female Shi ' ido Dark Lord of the Sith known as Belia Darzu , the holocron was a four - sided device that was shaped in the form of a pyramid . The holocron contained a crystal matrix capable of storing large amounts of information , among which included Darzu ' s philosophical views on the Force , as well as her knowledge of Sith alchemy and the dark side technique known as " mechu - deru " . In addition , it held instructions regarding the construction of a holocron , detailing the entire process — including the elaborate Rite of Commencement — while showing cutaway images of such a device . Upon activation , the holocron projected an avatar of Lord Darzu to serve as its gatekeeper , mimicking her physical appearance and her inborn ability to shape - shift . History . Hundreds of years before the end of the Draggulch Period , a Sith Lord called Belia Darzu operated in a revived faction of the dark side - worshipping Sith Order . In 1250 BBY , she held the mantle of Dark Lord , becoming the new leader of the Sith in the period known as the Sictis Wars . During this time , Lord Darzu constructed a Sith holocron , recording her knowledge of the dark side arts that were used to create her technobeast army . The holocron was kept in the underground inner sanctum of Darzu ' s fortress on the planet Tython , remaining there following her assassination in 1230 BBY . By this point , the holocron had been imbued with the power of the dark side , becoming the last surviving vestige of its creator . The dark side energy radiating from the device spread throughout Lord Darzu ' s fortress , attracting her remaining technobeasts and prompting them to congregate around it . In 990 BBY , the holocron of Belia Darzu was located by Darth Bane , a survivor of the New Sith Wars who sought the secrets to creating a holocron of his own . After infiltrating Darzu ' s fortress and fighting off a horde of leftover technobeasts , Bane retrieved the holocron and scoured its contents while interacting with device ' s gatekeeper . The holocron was later briefly given to Darovit , a Human male who kept the device hidden during a heated lightsaber duel inside the fortress . By the end of the fight , the apprentice of Bane — Darth Zannah — recovered the holocron of Lord Darzu before journeying to the planet Ambria . Behind the scenes . In 2007 , the holocron of Belia Darzu was first depicted in " " , the second novel of Drew Karpyshyn ' s " Darth Bane " trilogy . The holocron later received its own entry in " The Complete Star Wars Encyclopedia " , released in 2008 .