Korean dragon

Korean dragons (Korean: 용/룡; RR: yong/ryong) are legendary creatures in Korean mythology and folklore. It originated from Chinese dragons.
Whereas most dragons in European mythology are linked to the elements of fire and destruction, dragons in Korean mythology are primarily benevolent beings related to water and agriculture, often considered bringers of rain and clouds. Hence, many Korean dragons are said to have resided in rivers, lakes, oceans, or even deep mountain ponds.
The symbol of the dragon has been used extensively in Korean culture, both in Korean mythology and ancient Korean art.
Ancient texts sometimes mention sentient speaking dragons, capable of understanding complex emotions such as devotion, kindness, and gratitude. One particular Korean legend speaks of the great King Munmu, who on his deathbed wished to become a "Dragon of the East Sea in order to protect Korea".
The Korean dragon is in many ways very similar in appearance to other East Asian dragons such as the Chinese and Japanese dragons. It differs from the Chinese dragon in that it developed a longer beard.
As with China, the number nine is significant and auspicious in Korea, and dragons were said to have 81 (9×9) scales on their backs, representing yang essence. Very occasionally a dragon may be depicted as carrying a giant orb known as the yeouiju (여의주), the Korean name for the mythical Cintamani, in its claws or its mouth. It was said that whoever could wield the yeouiju was blessed with the abilities of omnipotence and creation at will and that only four-toed dragons (who had thumbs with which to hold the orbs) were both wise and powerful enough to wield these orbs, as opposed to the lesser, three-toed dragons.
Korean folk mythology states that most dragons were originally imugis (이무기; Imugi), or lesser dragons, which were said to resemble gigantic serpents. There are a few different versions of Korean folklore that describe both what imugis are and how they aspire to become full-fledged dragons. Koreans thought that an imugi could become a true dragon, or yong or mireu, if it caught a Yeouiju which had fallen from heaven. Another explanation states they are hornless creatures resembling dragons who have been cursed and thus were unable to become dragons. By other accounts, an imugi is a proto-dragon that must survive one thousand years in order to become a fully-fledged dragon. In either case, they are said to be large, benevolent, python-like creatures that live in water or caves, and their sighting is associated with good luck.
The imugi is also called ishimi (이시미), miri (미리), yeongno (영노), gangcheori, kkwangcheori (꽝철이), kkangcheori (깡철이), bari (바리), hweryong (훼룡; 虺龍), or iryong (이룡; 螭龍).
Gangcheori are dragon-shaped monsters that popularly feature in Korean mythology that were introduced in the 17th century. One of the earliest records of Gangcheori being mentioned is the Jibong Yuseol (1614). In those days, there was an old saying, "Where Gangcheori goes is like spring even it is fall." When author Lee Soo-kwang asked an old man in the countryside about the origin of the word, the old man told him about a monster called Gangcheori that burns down everything in a few miles. According to the records in "Seongho saseol" (mid-18th century), Gangcheori is a venomous dragon that like to live in swamps or lakes, and emits a powerful heat that destroys moisture and causes drought. It also brings storms, lightning, and hail to ruin crops.
The Korean cockatrice is known as a gyeryong (계룡; 鷄龍) "chicken-dragon"; they do not appear as often as dragons. They are sometimes seen as chariot-pulling beasts for important legendary figures or the parents of legendary heroes. One such legend involves the founding of the Kingdom of Silla, whose Lady Aryeong was said to have been born from a cockatrice egg. It is also the origin of the name for the city of Gyeryong in South Chungcheong Province.