Simus

Simus was an ancient Sith Lord who lived during the golden age of the Sith Empire, circa 5,000 BBY. Centuries earlier, he had been decapitated by Dark Lord Marka Ragnos, but managed to preserve his life via Sith magics. He spent the rest of his days as a severed head in a jar. Lord Simus was ultimately killed during the rise to power of his protege, future Dark Lord Naga Sadow, who murdered him and framed hyperspace explorers Gav and Jori Daragon in order to rouse the Empire to war against the Galactic Republic.