Zasfarin (originally from Zasfar island) is the ethnic religion of the Zasfarian people. It is an ancient, polytheistic religion with the Rupash as its foundational text. It encompasses the religion, philosophy, and culture of the Zasfarian people and was given to them by Leron. Zasfarin encompasses a wide body of practices, theological positions, and forms of organization. Ever since the Zasfarians left their island, a variety of movements were developed, most of which emerged from True Zasfarin, which holds that the gods sent their guardians to protect their regions since the rebellion of the wrong. all or part of this assertion is challenged by various groups such as the jisten and Trinik Zasfarin which developed during the tzuderic empire's rule; and the Lezasrin and tnereans that became widespread in the early Hesemon Age.