En was a spherical air body—a titanic gas giant. It is said that the primordials used the gases of En to help produce the crystal sphere that enclosed Doomspace, scattering En's nine moons in the process.
Aruun. This large moon is home to rampaging tarrasques. Aartuks (see Boo's Astral Menagerie) and other smaller life forms live in the forests that grow atop Aruun's rocky pillars and plateaus, beyond the reach of the tarrasques.
G'vek. This moon is dotted with sheer mountains that have become home to families of aarakocra evacuated from Fyreen. B'rohgs (see Boo's Astral Menagerie), death dogs, gorgons, hydras, and other monsters stalk the foothills.
Inivar. Inivar is a swirling ball of multicolored gas. An intense, flickering light emanates from the moon's core, creating a sort of celestial beacon.
Lesk. The largest of the nine moons of En is a dark desert. Here, clans of ssurran (see Boo's Astral Menagerie) eke out a harsh existence.
Shalar. Shalar is an ice moon with a ring of ice crystals circling its equator. Humans evacuated from Fyreen have built large camps on Shalar's polar ice caps, and dinosaurs roam the frozen landscape, feeding on scant vegetation and each other.
Thrydd. Deep canyons crisscross the surface of this giant ball of ice. The canyons are heated by thermal vents and inhabited by braxats,* gaj,* megapedes,* remorhazes, ssurran,* and thri-kreen. (Creatures marked with an asterisk are described in Boo's Astral Menagerie.)
Vocath. This moon, composed entirely of toxic green gas, is featured in chapters 8 and 9.
Yisheen. This small, barren moon is covered with black frost and belongs to Yisheen, a miserly adult lunar dragon (see Boo's Astral Menagerie) that abides no solicitors.
Yort. This cold, swampy moon is strewn with the petrified skeletons of kindori (see Boo's Astral Menagerie). Humanoid evacuees from Fyreen have taken to building shelters among the bones.