Demon

Kidoku

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Tradition / Region: Japanese Mythology
Alternate Names: Oni-doku
Category: Mountain dweller, Demon

The Myth

On the thirteenth day of the eighth month in the second year of Kan’en (1749), a strange and terrifying event took place in Soma County of Hitachi Province.

Atop Mount Masakado stood an ancient pine tree. It was said to have grown there since the days of Taira no Masakado, its roots gripping the mountain for generations. But that year, long and relentless rains soaked the land. The mountain soil eroded, and floodwaters rushed down its slopes, exposing the roots of the old pine. Then a fierce wind arose and toppled the great tree from its base.

When the pine fell, something was revealed beneath its roots.

Buried in the earth lay a monstrous being—what people called a “Kidoku,” a Demon Slayer, though no one knew its true nature. As the rain beat down upon it, the creature awoke and began to scream.

Its cries echoed across the castle town below. The sound was so dreadful that men, women, and children alike were seized with terror. Some collapsed where they stood. Others fled indoors, covering their ears. The wailing did not cease.

The castle’s commander gathered a rifle squad and marched to the mountain. The creature, fully exposed now, writhed and shrieked beneath the fallen pine. It was immense—said to be the size of eight tatami mats laid side by side.

Those who saw it described a form like a monstrous ogre mixed with a crab. Its eyes were round and bowl-like, shining with an eerie light. The top of its head was sunken inward. Crimson hair, stiff and sharp like palm leaves, bristled from its scalp, and beneath its chin grew spiky strands like thorns. Its teeth were bared in rage.

The riflemen fired again and again. After several shots, the monster finally fell silent.

Thus the Kidoku was slain, and the mountain returned to stillness. But people long remembered the day when the ancient pine fell, and a screaming demon rose from the earth beneath its roots.

Gallery

Sources

tyz-yokai.blog.jp contributors. (n.d.). Kidoku. In tyz-yokai.blog.jp, from https://tyz-yokai.blog.jp/archives/1077741605.html

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Mouryō

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Tradition / Region: Chinese mythology
Alternate Names: Hōryō, Hōliang, Hōxiang, Hongliang, Mizuha
Category: Mountain dweller, Zombie, Demon

The Myth

In the deep places of the world—where mountains rise thick with trees and rivers slip silently through stone—there dwell beings known as the mouryō. They are not born as humans are, but arise from the spirit of the land itself: from forests, streams, roots, and shadows beneath the earth.

Ancient texts say that the mouryō appear like small children, no taller than three-year-olds, yet their forms are unsettling. Their skin is dark and reddish, their eyes glow red, their ears are long, and their hair is strangely beautiful. Though they resemble children, they are not innocent. They linger near graves, riverbanks, and old pine trees, places where the boundary between life and death is thin.

At night, the mouryō creep from the roots of trees or from wet earth. They dig into burial grounds and feast upon the livers of corpses, sustaining themselves on the remains of the dead. Because of this, people once feared them greatly, believing that graves left unguarded would invite these beings. Some said that when a corpse vanished, carried away in the night, it was not the work of hellfire or demons from below, but the mouryō dragging the body back into the forest.

In later tales, the mouryō became confused with other corpse-stealing monsters. Some claimed they were the same as the fiery kasha, while others insisted they were water spirits, haunting rivers and marshes. Still others said they were kin to the kappa, born of stagnant waters and rot. No matter the explanation, the fear remained the same: the mouryō were creatures that thrived where decay met neglect.

Travelers avoided old trees at night, and families guarded their dead, for it was said that once a mouryō had tasted a corpse, it would return again and again. Silent, patient, and hungry, the mouryō endured as a reminder that the land itself remembers death—and that some spirits feed upon what humans leave behind.

Gallery

Sources

TYZ-Yokai Blog contributors. (n.d.). 魍魎 (Mouryō). In TYZ-Yokai Blog, from https://tyz-yokai.blog.jp/archives/1072334859.html

Interpretive Lenses

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Psychological Readings
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  • How to Invite The Mouryō

Devil Boruta

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Tradition / Region: Polish mythology
Alternate Names: Boruta, Błotnik, Borowiec
Category: Demon, Swamp dweller, Shapeshifter

The Myth

In the forests, swamps, and muddy roads of Poland, people long spoke of Devil Boruta, a spirit who delighted in confusing travelers and leading them astray at night. When carts became stuck in the mud or paths vanished in the dark, it was Boruta who was blamed—lurking unseen, laughing as people wandered in circles through marsh and woodland.

Boruta was not always imagined as a horned demon. In older folk belief, he was closer note a wild forest spirit, a remnant of pre-Christian beings who ruled untamed places. After Christianization, this spirit was reshaped into a devil, though he retained his connection to bogs, dams, forests, and muddy crossings. He could appear suddenly as a black dog, slip through reeds as a shadow, or remain unseen while his presence was felt through fear and confusion.

Later stories—especially those popularized in books—portrayed Boruta as a devil dressed like a nobleman, tempting the upper classes with pride, corruption, and excess. Yet among common folk, Boruta was far less refined. He was a błotnik, a swamp devil, called upon when wagons sank into mud or when travelers lost their way. Peasants did not fear him as a tempter of souls so much as a malicious spirit of difficult terrain, a force of nature that punished arrogance and carelessness.

Boruta did not rule hell, nor did he demand worship. He belonged to the borderlands—between forest and field, road and swamp, safety and danger. To meet him was not always fatal, but it was humiliating, exhausting, and frightening. Those who mocked him or wandered carelessly risked being lost until dawn.

In this way, Devil Boruta stands as a shadow of older pagan spirits: no grand lord of evil, but a sly, muddy trickster who reminds humans that the wild places do not belong to them.

Sources

Wikipedia contributors. (n.d.). Devil Boruta. In Wikipedia, The Free Encyclopedia, from https://en.wikipedia.org/wiki/Devil_Boruta

Manchachicoj

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Tradition / Region: Argentine Mythology
Alternate Names: —
Category: Demon, Gnome

The Myth

Manchachicoj was said to be a small and deformed being, born of an unnatural union between a demon and a terrestrial witch. Though his body was misshapen, he possessed a strange charm: elegant in manner, seductive in speech, and gifted with a romantic soul that did not match his monstrous origins.

He lived in the Salamanca, the legendary place of sorcery and forbidden knowledge, where demons, witches, and spirits gathered beyond the reach of ordinary people. From this shadowed world, Manchachicoj would emerge, drawn again and again toward humanity by an unfulfilled longing.

His fate was tragic. No matter how refined his words or how sincere his devotion, Manchachicoj was doomed to fall in love with young human women who could never truly belong to him. Each love was impossible from the start, divided by nature, destiny, and fear. He could enchant and fascinate, but never remain. His presence carried danger and sorrow, and his romances ended in separation, loss, or despair.

Thus Manchachicoj became a symbol of cursed desire: a being caught between worlds, elegant yet grotesque, condemned to wander in search of a love he could approach but never keep.

Sources

Wikipedia contributors. (n.d.). Legendary creatures of the Argentine Northwest region. In Wikipedia, The Free Encyclopedia, from https://en.wikipedia.org/wiki/Legendary_creatures_of_the_Argentine_Northwest_region

Mężyk

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Tradition / Region: Polish mythology
Alternate Names: Mały mąż, mały człowiek, mały mężczyzna
Category: Demon, Gnome

The Myth

In the old beliefs of the Pomeranian people, Mężyk was a feared male demon who preyed upon the most vulnerable moments of human life. He was especially dangerous to women who had just given birth and to their newborn children, striking during the fragile time of childbirth and early infancy.

Mężyk was described as a small, male figure with a beard so long it reached all the way to the ground. He moved unseen through homes at night, slipping close to cradles. When his moment came, he would seize a child from its crib and hurl it onto the bench near the hearth. If no one intervened in time, he would steal the infant away completely, carrying it down into the underground world from which he came. Some believed the stolen children were never returned, replaced instead with sickly or unnatural beings.

He was considered the male counterpart to dangerous female spirits such as the dziwożony, mamuny, sybiele, and boginki—beings likewise blamed for the disappearance or exchange of infants. Together, these spirits embodied the deep anxieties surrounding childbirth, infant mortality, and unseen forces lurking at the edge of the household.

To protect against Mężyk, families relied on simple but powerful defenses. Iron or steel objects were placed in the cradle—knives, nails, or other metal items—believed to repel the demon and prevent him from approaching the child. Through such measures, people sought to guard newborns from the bearded thief who waited in the shadows, ready to snatch life away before it had fully begun.

Sources

Wikipedia contributors. (n.d.). Mężyk (demon). In Wikipedia, The Free Encyclopedia (Polish), from https://pl.wikipedia.org/wiki/M%C4%99%C5%BCyk_(demon)

Galgenjong

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Tradition / Region: Belgian Mythology
Alternate Names: Galgenaas, Duivelsjongen
Category: Gnome, Demon

The Myth

In old Flemish tales there is a sinister little being known as the Galgenjong, a creature bound to bargains and blood. In its smallest form it appears as a tiny black beast, no larger than a pea, with a blood-red mouth. At other times it takes on a clearer shape: a gnome-sized figure, as large as a child’s doll, black-skinned, with shining eyes and a red tongue. In this form it hides itself in a small box or a pouch, waiting for its owner’s command.

Whoever possesses a Galgenjong gains unnatural advantages. Their hands move faster than any other worker’s, their strength exceeds human limits, and luck follows them—especially in games of cards. The creature can see what is yet to come and knows where hidden treasures lie, whispering secrets no ordinary person could uncover.

But its gifts are never free. Each day the Galgenjong must be fed a drop of its owner’s blood. Without this offering it grows restless and dangerous. Though it brings fortune to its master, it spreads misfortune to everyone around them. Neighbors fall into bad luck, accidents multiply, and prosperity withers wherever the creature lingers.

To obtain a Galgenjong, one must commit oneself to darkness. Some say it can be gained by fasting for three days in honor of the Devil. Others claim it comes only through joining a secret and wicked brotherhood. Once acquired, the creature is almost impossible to be rid of. It cannot be dismissed or destroyed by its owner’s will alone. Only if someone else steals it away can its bond be broken.

If the Galgenjong remains with its master until death, it claims its final payment. When the owner dies, the creature carries their soul with it, dragging it down to hell as the last fulfillment of the pact.

Thus the Galgenjong is remembered as a source of power and ruin alike: a tiny servant of immense danger, promising success in life while quietly ensuring damnation in the end.

Sources

Abe de Verteller contributors. (n.d.). Van aardmannetje tot zwarte juffer: Een lijst van Nederlandse en Vlaamse elfen en geesten. In Abe de Verteller, from https://abedeverteller.nl/van-aardmannetje-tot-zwarte-juffer-een-lijst-van-nederlandse-en-vlaamse-elfen-en-geesten/

Loviduch

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Tradition / Region: Polish Mythology
Alternate Names: —
Category: Forest dweller, Demon

The Myth

Loviduch is a forest demon found in the folklore of the Lasowiaks, a subethnic group of the Lesser Poles living on the Tarnobrzeg Plain in southeastern Poland. According to beliefs recorded in the 19th century, the loviduch dwelled in the Sandomierz Forest, where it lay in wait for restless souls wandering far from their proper place.

In appearance, the loviduch was described as strange and unsettling. It resembled a tuberous or onion-shaped body, set upon spiny, five-toed feet. Its limbs were short and thin, ending in long fingers armed with sharp claws. Though small and misshapen, it was considered fearsome because of its purpose rather than its strength.

The loviduch did not prey upon the living. Instead, it hunted ghosts and wandering spirits, capturing those restless souls that lingered in wastelands far from human settlements. Its dwelling was said to be the desolate, empty places, where such spirits were believed to roam. Once it seized a soul, the loviduch tormented it relentlessly, mocking it and making it cry, though it never destroyed it outright.

Despite its cruel treatment of spirits, the loviduch posed no danger to living people. Humans were not its concern, and it did not attack or harm them. Its role was limited entirely to the supernatural realm, acting as a tormentor of the dead who failed to find rest.

Over time, the name loviduch came to be applied jokingly or disparagingly to certain medical workers, though this usage bore no resemblance to the original being. Unlike these human namesakes, the true loviduch of folklore remained a creature concerned only with ghosts and spirits, dangerous solely to the dead and invisible to the living.

Sources

Bestiary.us contributors. (n.d.). lovidukh. In Bestiary.us, from https://www.bestiary.us/lovidukh

Bolts

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Tradition / Region: Polish Mythology
Alternate Names: Errors
Category: Forest dweller, Demon

The Myth

Bolts are malicious forest or field demons known in the folk tales of Eastern Lesser Poland. They are believed to lure people away from proper paths, drawing travelers into wilderness, fields, or unfamiliar terrain where they lose their sense of direction.

These beings are closely associated with confusion and delusion, and are sometimes described as manifestations of madness or devilish influence. In local belief, bolts often appeared to people returning at night—especially those walking home from inns or taverns—leading them astray and preventing them from finding their way.

In the region of the Rzeszów Foothills, bolts were closely related to another figure known as the error, a demon said to sit at crossroads, sometimes beneath stones. Like the bolt, this being led nighttime travelers through open fields, causing spatial disorientation and helpless wandering. Because of these beliefs, people erected roadside shrines at such places and held special processions there, hoping to protect themselves from being misled.

Bolts were thought to nest near roads and highways, choosing places where travelers were most vulnerable. By means unknown, they caused sudden loss of orientation, making familiar routes feel unfamiliar. They seemed to take particular pleasure in confusing those who had spent the evening drinking, and many tales describe people arriving home at dawn ragged, bruised, and without their belongings, claiming that a bolt had led them astray.

In popular explanation, such misfortune was attributed not to human error, but to the direct action of these demons. To say that “a bolt went wild” became a way of explaining unexplained wandering, exhaustion, and loss.

Though later generations joked that the demon itself may have vanished, folklore preserves the belief that the experience of confusion in the night—of losing one’s way without knowing how—has never entirely disappeared.

Sources

Bestiary.us contributors. (n.d.). Bolts. In Bestiary.us, from https://www.bestiary.us/belty/pl

Abyzou

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Tradition / Region: Mesopotamian, Greek, Byzantine
Alternate Names: Abizou, Obizuth, Obyzouth, Byzou, Gylou, Gello, Alabasandria, Anabardalea, and countless others
Category: Demon, Snake, Hybrid

The Myth

From the deepest darkness before the world was formed, Abyzou came forth. She rose from the primeval waters, from the abyss that existed before heaven and earth were divided. In that endless sea she was born barren, and from her barrenness grew envy without limit.

Abyzou wandered the world without rest or sleep. She moved silently through night and shadow, drawn to the cries of women in labor and the breath of newborn children. She was said to feel no mercy, for what she desired most had been denied her forever. Because she could not give life, she sought to take it.

When a woman lay ready to give birth, Abyzou would draw near. If she was not driven away, she strangled infants in their cradles, stole them in the night, or brought sickness upon them so that they wasted away. She whispered illness into bodies, closing throats, blinding eyes, twisting minds, and filling flesh with pain. Wherever she passed, suffering followed.

Abyzou did not walk openly among mortals. Her form was half-seen: a greenish, gleaming face framed by writhing, serpent-like hair, while the rest of her body dissolved into darkness. Sometimes she appeared with the scales or tail of a fish or serpent, for she belonged to the ancient waters. She claimed to possess countless names and shapes, changing them constantly so that none might easily command her.

In ancient times, King Solomon encountered her while binding demons to build the Temple. When she was brought before him in chains, she confessed her deeds freely, boasting that she never slept and that each night she sought children to destroy. Solomon ordered her bound by her own hair and displayed before the Temple, so that all might see the demon who preyed upon mothers and infants.

Yet Abyzou could never be destroyed. She could only be driven away.

Thus people learned to defend themselves through sacred names, seals, and charms. Her name was written on amulets, spoken aloud in childbirth, carved into metal and stone. When she was named correctly, she was forced to flee. When the names of her enemies—angels, saints, or divine protectors—were invoked, she recoiled in fury and envy.

In Egypt she was known as Alabasandria. In Byzantium she was Gylou or Gello. In each land she took a new name, but her hunger remained the same. Riders trampled her beneath their horses in sacred images. She was whipped, bound, cursed, and cast out in spells, yet always returned when vigilance failed.

Only one thing could stop her: knowledge of her names. When a woman about to give birth wore an amulet bearing those names, Abyzou was powerless. Forced by oath, she would turn away and retreat to the dark waters from which she had come.

And so Abyzou still wanders the edges of night, driven by envy, searching for life she can never possess—an ancient shadow born from the abyss, feared wherever children are born.

Gallery

Sources

Wikipedia contributors. (n.d.). Abyzou. In Wikipedia, The Free Encyclopedia, from https://en.wikipedia.org/wiki/Abyzou

Interpretive Lenses

Religious Readings
  • Christian Ascetic Deep Dive
Philosophical Readings
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Political / Social Readings
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Other
  • How to Invite The Abyzou

Oto Akuka

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Tradition / Region: Japanese Mythology
Alternate Names: —
Category: Demon, Cow, Pig

The Myth

Oto Akuka is a demon recorded only once, in a single old Japanese scroll. Beyond this appearance, nothing more is known. There are no surviving stories, no extended legends, and no later mentions of the creature.

In the scroll, Oto Akuka is shown with blue skin and a beast-like face. Its head is bald and crowned with two horns, and its nose appears crushed, giving it the resemblance of a cow or a pig. The demon is depicted kneeling on the ground. One hand is pressed firmly against the floor, while the other supports its body as it vomits.

The image presents Oto Akuka not as a being that attacks others, but as one overcome by what rises within itself. The demon is shown in the moment of release, brought low and humiliated by its own condition. Its punishment is not delivered by an external force, but unfolds openly through its own body, in full view.

Oto Akuka remains an isolated figure in Japanese folklore—a single, unsettling image preserved in a scroll, offering no tale of origin or aftermath, only the enduring vision of a demon brought to shame.

Sources

Youkai Gazou Database. (2007).
鬼；オニ，嘔吐；オウトInternational Research Center for Japanese Studies (Nichibunken). Retrieved from https://www.nichibun.ac.jp/cgi-bin/YoukaiGazou/card.cgi?identifier=U426_nichibunken_0080_0008_0005

Also mentioned in my book Legendary and Mythical Cows