The Watchers

The Watchers were an ancient organization that kept tabs on ongoing events around the world in their era. They have a small number of hideouts throughout Archestria, each marked by a symbol that looks like an eye. They had an affinity for puzzles, and frequently used them to guard their hideouts from invaders lacking the cleverness to enter. Their texts are written in the constellation script.
A group of PCs searched the Watcher's Den, a cavernous hideout in Scorch Alley. They found burned archives, a bored demon standing guard, and remnants of the Watchers' texts. They completed a "farspeaking ritual" that created a semispherical window to a strange, dark, dome-shaped chamber.