Yuggothians

The Yuggothians drift through human awareness like a rumor that refuses to either confirm itself or die. They are ancient beyond any reliable reckoning, their forms defying easy classification, as if the human mind resists assembling a complete image. What is known, or at least widely suspected, is that they maintain hidden installations on various moons of the Terran solar system. Whether these bases are remnants of something older or part of an ongoing design remains an open and deeply unsettling question.