Wyrn is an ancient resident of Sel who founded the nation of Fjorden. Subsequent rulers of Fjorden have used "Wyrn" as a title.
He is the subject of the oldest known literary work on Sel, Wyrn the King. He lived long before the founding of Shu-Dereth and Shu-Korath. After Shu-Dereth was adopted as the state religion of Fjorden, modern Derethi priests altered historical documents to falsely claim that Wyrn was Derethi and worshipped Jaddeth.
He is said to have wielded a sword named Gretgor. A sword thought to be Gretgor is still extant and held in Widor.