As Shilla Dynasty succeeded in union war, so the Korean Peninsula could be united. Shilla Dynasty imported advanced culture from Tang Dynasty. Shilla Dynasty refined. But the traditional culture also held out especially the magical ritual. Literature was a branch of the magical ritual or at least it was an important part of that ritual. We can find many of those examples from the old records in Chinese characters. These records recorded that literature had the magical power and literary works could influence ghosts and gods. However these literary works seldom lyrical ballads or written works. They were often oral tradition. As we know oral signs are different from written signs from the points of the scenic, the instancy, the facial, the situational, the oral literature is more suitable than the written literature. The oral literature makes a deep impression instantly and collectively. There were three kind of traditional literary groups in United Shilla Dynasty, first a border group, second Hwarang group and the last transitional literacy. Pihyong, Cheyong, Jigui are belong to the first group. They can't be seperated from the ritual. The songs about them might be created and handed down from generation to generation among the natives. At last the songs or literary were transformed into an amulet to avert evils. When the Queens reigned the Dynasty, Wharang, for example Yungcheonsa, Chungdamsa, and Wolmyongsa invited to conduct rites of maintain peace and order in Shilla society. They created Hyangga and contributed themselves to these rites. Hyangga was thought to contain the idea of these social tranquility and to have the magical power of desire of social stability, however, later these were restricted to individual ideas and desires. Wanggeoin is the typical model of intellectual in transitional periods. He was grouped to be a member of Kukin and also to be an writer. He wrote an incantation on the one hand, and wrote a literary work on the other hand. So we could reason that literary work did not differ from the incantation.