A religion of Xol Impendians, which is the worship of gods associated with Xollum and Xolrut, the binary stars of the Xollum-Xolrut System in which Impendia is a planet.

Its followers have historically built henges to their gods at the edges of strateaus within their territories, to guard against mythical creatures dwelling inside the hydrocarbon layers. They believe that a demon from Xolrut will someday descend upon Impendia and release these creatures, and that the god Um will come down from the sky and banish the beasts forever, clear away the hydrocarbon haze, and reveal vast, glowing and colorful cities of structids.