A ring of devotion is made by taking a clay ring to Father Aereck and having him bless it. It cannot be given to Morgan to complete one of the tasks for the Lumbridge/Draynor area (the ring in question must be a regular clay ring).
This ring provides protection from Saradomin's followers within the God Wars Dungeon. Currently it is the only ring slot item that counts as a god item within the dungeon. The ring also makes Bandits aggressive in the bandit camp in the desert.