The Warriors of the Shadow, sometimes referred to as the Warriors of the Shadow, consisted entirely of female members and were a cult that branched off from the Taung civilization. Following the Zhell's expulsion of the Taung species from their homeworld, Notron, a group of Taung women established a sisterhood and journeyed to the Unknown Regions, hoping to achieve redemption through contemplation and understanding. The Warriors once battled the Knell of Muspilli, a competing cult, in orbit above a certain moon located in the Unknown Regions. Ultimately, after thousands of years spent on the twelve planets comprising the Nihil Retreat, the Warriors of Shadow assimilated with both the Knell and a third cult, the Kanzer Exiles.
The reference book The Unknown Regions, released in 2010, initially alluded to the Warriors of Shadow, with Daniel Wallace's annotations explicitly labeling them as "The Warriors of the Shadow." The video game Star Wars: The Old Republic later formally named them "Warriors of Shadow" in the Archaeology crewskill mission titled "Battle of Terror".