Religion: The Church of The Sacred Oases:

Some of the followers of Qualo make a concerted effort to guard and protect the various oases of the realms and other hidden places of respite from harsh climates, places of peace where they build underground temples with a small portion above ground as a proving ground for those worthy to see what lies beneath.  They regularly strive to create more places of refuge in such areas, often expanding the oases, but never telling the location of the oases, instead letting others wander into them, or leading them blindfolded if need be.  Their icon is an empty glass upside-down in a bowl of sand.