The Neodahl are a religious order committed to bringing the return of the Hallowedark. They believe a collapsed star is the heart of a god, and a portal to the other side. Their movement has gained traction and they’ve ‘forcibly converted’ at least village in one colony.
Their claims would be disregarded as that of another cult with the exception that they’ve proven they can return from the other side - albeit in a zombified form.
The Neodahl Zombies have been showing up in colonies across the galaxy. Known deceased individuals have returned to their colonies, reanimated. They wreck havoc, spread terror, and then disappear again. There is no known explanation for this phenomenon.