Here’s an example of a strange little spirit cult (or more precisely spirit cults) from Sartar:
The rock formations of the Auroch Hills are home to many spirits. Most are malevolent to strangers, but some are the subject of spirit cults, led by a local shaman. Each spirit cult teaches a single Rune spell. Examples include Become (Other Shape), Blast Earth, Crack, Create Fissure, Illusory Sight, and Illusory Sound. Each pillar spirit is independent and does not accept initiates of another pillar.