This short adventure, entitled The Mask of Darth Nihilus, can be found within the pages of the The Unknown Regions sourcebook. It is crafted for characters at level 11 and unfolds in the era following the rise of the Galactic Empire.
Following a trail of clues, a team of heroes finds themselves on a quest to locate the mask of Darth Nihilus, a relic of the ancient Sith, which is said to be hidden on the planet of Volik, situated within the uncharted Unknown Regions. Arriving on Volik, the heroes learn that the mask is concealed within the remains of a Dynamic-class freighter named the Nashuaga. This wreckage lies in a cove, which once served as a base for the Wavelength Gale smugglers. The cavern's location is deep within Mount Vorena, accessible only by a difficult and lengthy ascent. The heroes are not alone in their pursuit, however. They must also face the Apex Society, spearheaded by Sith academic and aspiring apprentice Collan Eislo, in addition to Sando's Boys, a group of pirates commanded by the Rodian named Sando.