The Wing-ta was a monastic order based in the town of Goisho in Koryo. For many years, the Wing-ta monks tended a shrine outside Goisho, the centerpiece of which was the Hu'i Wing, a massive magical brazier that revealed the future and was one of the most valued relics of Koryo. However, some ten generations before 1357 DR, Kozakuran forces stole the Hu'i Wing and carried it off to Karak, and they built it into their fortress there.