The Magisterium is by far the dominant religious institution of the eastern lands. The Magisterium lays claim to both spiritual and civic authority in worldly affairs. It ascribes the creation of the plains and cosmos to a uniquely divine being known as Andunai. Andunai, the One, is Father to all and is the only being truly worthy of creaturely worship. He is ministered to by an angelic host who act as his ambassadors to the world of Eriond.