Darth Lithos's holocron

Darth Lithos's holocron (also known as the Holocron of the Lost) was a holocron created by the Sith Lord Darth Lithos to preserve all of his knowledge of the Force and other things, including how he became quasi-immortal. It was impossible to access by normal means, causing instant death to all but the most powerful Force-users, and it even to them proved impossible to open. Apparently, Darth Lithos contained a part of his spirit in the holocron, causing it, too, to become almost indestructible. It took the form of a red, floating sphere etched with symbols in Mandalorian, the Sith language, and other unknown scripts. Darth Lithos kept it either on his person or in the Temple of Azzandra on Lycorax. Those who tried to open it claimed to hear strange voices echoing inside them, urging them to bow down to Darth Lithos and join the Lost Sith or to commit suicide.

Darth Lithos himself said that anyone who could unlock the holocron would be his own heir and in effect become Darth Lithos himself. It was long sought after the Dark Wars, when Darth Lithos disappeared from the galaxy, allegedly taking the Holocron with him. The droid HK-101 was able to access the holocron, but only because Darth Lithos programmed it to be able to. However, HK-101 was also programmed to attack anyone who inquired about the Holocron or tried to obtain the way to unlock it.

The Holocron also reportedly contained archives of the teachings of Darth Andeddu, Darth Nihilus, and several other powerful Sith. It was believed to be the source of the lightsaber crystal of Darth Lithos, which would have explained his strange saber color.

It contained a strange-looking hole on one side, originally thought to be part of an ancient locking device, although it was merely a dent caused by an attempt to destroy the device before Darth Lithos infused it.