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Bestiary of Cryptids & Legendary CreaturesImugi are Korean serpentine beings whose stories connect rain, human kindness and the possibility of becoming a dragon.
Also recorded as 이무기, Imoogi
The rain has come, and the fields are saved. Now a heavenly messenger stands in the temple courtyard, demanding the being who brought it. Boyang has hidden his companion beneath a desk. In front of them grows a pear tree. [6]
Read the manuscriptImugi, written 이무기, are serpentine beings in Korean tradition. A being able to bring rain may still need protection; one hoping to become a dragon may be stopped by an interruption. The temple legend of Boyang gives this dependence a name and a companion. Its medieval dragon is Imok, identified with imugi by the Korean folklorist Seo Dae-seok. Boyang is the monk who takes him into a new home. [5][2][6]
In Iryeon’s Samgukyusa, a medieval collection of Korean records and marvels, Boyang returns from studying Buddhist teaching in China. Crossing the West Sea, he is welcomed into a dragon’s palace and asked to recite scripture. His host gives him a robe woven with gold and sends his son Imok to serve him. The gift comes with instructions. Their homeland is troubled by war; Boyang should establish a temple at Jakgap, where he can escape the fighting. Before long, the dragon predicts, a worthy ruler will unite the kingdoms and protect the Buddhist faith. [6]
On reaching the valley, Boyang meets an elderly monk who calls himself Wonkwang. The visitor hands him a box containing a seal and disappears. Iryeon pauses over the apparition: Wonkwang belonged to a much earlier age. In his explanation, the old monk has come because ruined temples will live again through Boyang’s arrival. The welcome from the sea thus continues on land, with a vanished predecessor putting something into the newcomer’s hands. [6]
Boyang climbs the northern ridge to look for the abandoned temple. Below him stands a yellow pagoda, five storeys high. He descends to find it, but there is no trace. Climbing again, he sees magpies pecking at the earth. The birds recall the dragon’s instruction. He digs where they gather and discovers a mass of old bricks. When he stacks them into a pagoda, the work uses every one. He has found an earlier monastery’s remains. He completes his temple and names it Jakgapsa. [6]
Imok lives in a small pond beside it, quietly assisting its Buddhist work. One year a drought withers the crops. Boyang orders his companion to bring rain, and the district receives enough. What helps the farmers, however, brings danger upon the helper: the Heavenly Emperor intends to put Imok to death. Imok appeals to the monk. Boyang hides him beneath a desk and waits for the messenger.
Iryeon does not begin Boyang’s record with the dragon. He starts with an absence: the monk’s birthplace and family are not recorded in his biography. County documents enter the account instead. A land register names the monastery’s officers; another record marks its boundaries. Later testimony draws on local officials and elderly men. The marvels stand within a history assembled from administrative traces and remembered speech, including the names of people who supplied that speech. [6]
The compiler ends with a complaint about other writers. The magpie pagoda and Imok episodes, he says, have been assigned to Wonkwang; another of Boyang’s deeds has been attached to Biheo, a monk connected with neighbouring temples. A later biography repeats the mistake. Boyang is left without a life of his own, and subsequent readers inherit the confusion. Iryeon’s objection is quite particular: an extraordinary event can survive in writing while the person to whom it belongs disappears. [6]
The reconstructed pagoda rises among losses caused by conflict. The opening record says that five local monastic foundations had fallen into ruin during the disorder of the kingdoms. Their records came together at the larger Jakgap site. The dragon’s advice therefore directs Boyang towards both a refuge and a task of repair. Digging beneath the birds recovers material from a religious community that war has broken apart. [6]
The foundation account eventually fulfils the sea dragon’s promise. After unifying the kingdoms, King Taejo hears of Boyang’s work and grants the temple land associated with the five foundations. He gives it the name Unmunseonsa in honour of the sacred robe’s protection. The robe brought from the palace remains important even after Imok has settled beside the temple: one gift travels into royal patronage, while the other becomes its resident helper. [6]
Seo locates oral versions around Cheongdo and Miryang. At Unmunsa, the temple associated with Boyang, he records a telling that omits Imok’s journey with the monk and sends the departing serpent away angrily, splitting a rock with its tail. The setting persists while the relationship changes. [5]
The medieval account gives Imok remarkably little outward description. His father has a palace, he has a pond, and he can pass into concealment beneath furniture. The vivid changes of shape belong instead to the setting: a pagoda appears from a ridge and vanishes at close range; buried bricks become a standing tower; fallen wood returns to life. The extraordinary companion is known chiefly by what he does within that changing place. [6]
The rescue depends on a sound as much as on rain or lightning. Imok’s name and the word for pear wood are written with different characters in the Chinese text, but Seo notes their matching pronunciation. Boyang answers the demand with a gesture towards the tree. The visitor’s destructive power is unquestioned; the monk succeeds by directing it towards the wrong bearer of a name. [5][6]
The Folk Literature encyclopedia follows another trail to Hobakso, or Mortar Pond. A monk secretly follows a colleague who disappears at night and discovers him struggling to become a dragon at Daebiji. Exposed, the serpent lashes Eoksan Rock with his tail; its pointed shape becomes a trace of the departure. A continuing version places him in Hobakso after the revelation. Rock and pond hold different parts of the disappointed ascent. [2]
A separate rain tale in the same encyclopedia hides the threatened helper under flat stone flooring. The monk points the heavenly messenger towards a jujube tree. Before making rain, this Imok has explicitly feared death for disobeying heavenly orders; afterwards he stays in the pond, helping whenever drought returns. His ending is continued residence and usefulness. He does not need a final ascent to complete the relationship. [2]
Seo reads the temple legend as a meeting of water-being belief and Buddhism. The dragon household supports the monk, while the monk protects its son. Neither kindness removes dependence: Boyang needs rain for the surrounding fields, and Imok needs a hiding place when heavenly authority intervenes. The tale gives the powerful helper someone to whom he can appeal. [5][6]
That exchange reaches beyond the two companions. In the first ending, the tree has absorbed a punishment intended for Imok, and the saved dragon repairs it. In the alternative, Boyang completes both rescues. The difference gives care a different route through the same courtyard. Iryeon retains the disagreement without making the tree’s recovery expendable; the substitute is allowed to live too. [6]
Rain spoils anticipation in Ryu Kyung-Ja’s Busan fieldwork. On 8 July 2015, Son Sun-yeon described Yeonji Elementary School’s pond, filled in for construction. The being waiting there could no longer ascend and sent rain on outings and major events. Son Jeong-sik’s telling, recorded on 2 July, attaches the same grievance to a felled zelkova at Seongji Elementary School. Ryu interprets these school legends as altered survivals of dragon beliefs. The unwanted weather remembers what construction removed. [3]
Ryu also records varying periods of preparation: a thousand years in some accounts, much longer sequences in others. There is no single clock behind the abrupt interruption. A plan made for children’s recreation can collide with a far older imagined plan for departure. In these school stories, the being denied its future continues to intrude upon the future others arrange. [3]
The medieval pear tree has an afterlife beyond the rescue. Iryeon reports that it eventually fell again, in recent years relative to his account. Someone made wooden implements from it and placed them in the temple’s Hall of Good Dharma and dining hall; their handles carried an inscription. The passage does not supply that wording. It leaves an intriguing change of scale: wood once struck by a heavenly messenger becomes something handled within the community the dragon helped sustain. The tree outlasts the crisis, then survives its own fall in another form. [6]
The National Institute of Korean History presents the Chinese text beside a Korean rendering. The original Boyang record supports the connected temple narrative. [4][6]
National Folk Museum of Korea compilation team · National Folk Museum of Korea · 2024-12-10 · Encyclopedia of Korean Folklore and Traditional Culture, IX · English translation · Translated by Cactus Communications Korea Co. Ltd.
Printed pp. 34–37 and 123–125; PDF pages 19–20 and 63–64; credits, PDF page 3
Checked 2026-10-11
National Folk Museum of Korea Encyclopedia Planning Team · National Folk Museum of Korea · 2014-11-17 · Encyclopedia of Korean Folklore and Traditional Culture, III · English translation · Translated by Jung Hayun
Printed pp. 101 and 141; corresponding PDF pages 101 and 141
Checked 2026-10-11
Ryu, Kyung-Ja (류경자) · Society of Korean Literature / 한국문학논총 · 2017-12 · 한국문학논총 77, pp. 49–75; DOI 10.16873/tkl.2017.77.49 · Korean with English abstract
Printed pp. 49–52, 58–61 and 73–75; PDF pages 1–4, 10–13 and 25–27
Checked 2026-10-11
Iryeon (일연), historical compiler · National Institute of Korean History, Korean Ancient Historical Sources Database · Official Korean rendering of a Classical Chinese historical work
Artwork
Select a folio to enlarge it. Its caption describes the account, landscape or artistic choices behind the image.
Manuscript checked 2026-10-13. Artistic interpretations © Scott Schubr / Luminary Oddities.
Return to the Bestiary ↑When the visitor demands Imok, Boyang points to the pear tree in the courtyard. Lightning strikes it, and the messenger rises back into the sky. The tree falls ruined. Imok comes out and strokes it; life returns to the wood. Iryeon preserves a second ending to this act, in which Boyang’s incantation revives the tree. In either telling, the lightning has found a substitute and the threatened companion survives. [6]
Two benefactor tales in the National Folk Museum’s Symbols encyclopedia turn instead towards poverty. A scholar sells his wife’s hemp cloth for food, then spends the money persuading men to spare a rat snake. His family starves. His wife gives him a geomancer’s compass. At a funeral he shares rice with a child, who makes him a successful diviner of auspicious sites. The child reveals itself as the snake: the men broke their promise, preventing its dragonhood. Grateful nonetheless, it leaves him prosperous. [1]
The second begins with a starving father finding a maiden’s mountain house. After three years, he wants his family back and discovers her serpent tail. She requests his clothing cord dipped three times in jang, a condiment, during jesa, a ritual of offerings or remembrance. A centipede disguised as an old man asks for it; he refuses. Delivered to the maiden, the cord enables the heavenly daughter’s dragonhood. He returns to his family, their poverty ended. [1][7]
Book IV, chapter V, Boyangimok; IDs sy_004r_0010_0020_0020,0030,0050
Checked 2026-10-11
Seo Dae-seok (서대석) · Academy of Korean Studies, Encyclopedia of Korean Culture · 1995 · Article last revised 2023-02-07 · Korean
E0023469; definition, content and authorship record
Checked 2026-10-11
Iryeon (일연), historical compiler · National Institute of Korean History, Korean Ancient Historical Sources Database · Classical Chinese
Book IV, chapter V, Boyangimok: complete sections 0010, 0020, 0030 and 0050
Checked 2026-10-13
최근덕 (Choe Geun-deok) · Academy of Korean Studies, Encyclopedia of Korean Culture · Korean
Definition and attribution; written 1995, revised 28 November 2022
Checked 2026-10-13