The Bestiary of Prythian: Every Creature in ACOTAR, Explained

Full spoilers for Books 1–5 of the A Court of Thorns and Roses series follow below.

Ancient Deities & Primordial Death-Lords

The Bone Carver (Stryga's Twin)

Series: First encountered in A Court of Mist and Fury (Chapter 17) when Feyre Archeron and Rhysand descend into the depths of the Prison to seek information on the King of Hybern and the Cauldron's missing feet.
About & allegiance: An ancient death-god and true immortal. He is the twin brother of Stryga (the Weaver) and the younger brother of Koschei (the Death-Lord). Long before Prythian was carved into courts, he voluntarily entered and bound himself to the Prison to hide from his stronger siblings. He is allied with the Night Court in the war against Hybern after a bargain is struck.
Home or habitat: A high-security cell within the Prison—a cold, misty mountain on an isolated island in a gray sea, protected by ancient, magic-nullifying wards.
Physical description: He has no single true form. He typically appears as an innocent, young boy with inky hair and glowing violet/blue eyes. This form is a projection of the viewer's greatest emotional point—for Feyre, he projects the face of her future son with Rhysand. In battle, he shifts into an Illyrian soldier in his prime.
Abilities: He possesses true immortality. He has the unique ability to see and carve a person's exact death into bone. Feasting on the scent of fear, he can fell hundreds of soldiers with a single breath. On the battlefield, his ivory scimitar sweeps through enemy ranks, killing soldiers instantly without leaving a physical mark.
Importance: He reveals the existence of the Book of Breathings and explains how the Cauldron's power can be negated or controlled. He joins the Prythian coalition in the final battle against Hybern after Feyre proves her worthiness by retrieving the Ouroboros mirror.

The Daglan

Series: Referenced historically in A Court of Silver Flames (Chapter 54) by Rhysand while discussing ancient legends of Prythian.
About & allegiance: A tyrannical race of near-gods and monsters who were the first masters of the world before the courts existed. They ruled and enslaved both humans and Fae for millennia.
Home or habitat: They ruled the entire continent of Prythian in the primordial era.
Physical description: Depicted in ancient, forgotten books of legends as tall, strange-looking beings wearing crowns.
Abilities: They possessed immense, primordial magic, drinking the magic of the land like wine. They terrorized their enslaved subjects with the Wild Hunt.
Importance: Their reign of terror was finally broken during the Age of Legends when the Fae hero Fionn rose with the sword Gwydion, casting off their chains. Their defeat led to the creation of the seven High Lords and the establishment of the modern court system.

Koschei (The Death-Lord)

Series: Referenced heavily in A Court of Silver Flames as the shadowy mastermind pulling Queen Briallyn's strings from across the sea.
About & allegiance: A primordial death-god and true immortal. He is the older brother of the Bone Carver and Stryga. He was bound to a lake on the continent millennia ago by an ancient spell after being outsmarted. He forms a dark alliance with the withered human queen Briallyn and High Lord Beron to destabilize Prythian.
Home or habitat: Confined to a remote, enchanted lake on the continent.
Physical description: Never directly physically encountered in the narrative, but described as as old as the sea—older. He is known as “Koschei the Deathless” because he has no death awaiting him.
Abilities: A true immortal who is the master of his own death. He possesses insidious mental influence, whispering thoughts on the wind into the courts of queens and High Lords. He holds a absolute magical leash over those who bargain with him, such as Vassa. He can winnow individuals across the sea using his immense power.
Importance: He serves as the overarching threat of A Court of Silver Flames. He orchestrates Briallyn's hunt for the Dread Trove (the Mask, Harp, and Crown) in a bid to break the ancient spell binding him to his lake, posing a catastrophic threat to both the Fae and human realms.

Lanthys

Series: Appears in A Court of Silver Flames (Chapters 29 and 54) when Nesta Archeron's command to the Harp accidentally unlocks his cell, culminating in a lethal confrontation.
About & allegiance: A deathless, near-primordial First God of wind, hatred, and shadow who ruled the world before the High Fae split into courts. He was the father of the Bogge race. Centuries ago, Cassian used Lanthys's immense arrogance to trick him into trapping himself in an ash-wood mirror before dumping him in the Prison.
Home or habitat: An iron-doored cell deep within the lowest levels of the Prison.
Physical description: His true form is a swirling mist of pure darkness and hatred. When physically manifested, he appears as a tall, exceptionally handsome male with broad shoulders, graceful hands, and too-long teeth that easily shift into a horrific, predatory sneer.
Abilities: A true immortal who cannot be killed by ordinary physical means. He can turn into wind to suffocate his prey by ripping the air from their lungs, or turn into rain to drown them on dry land. He can peel skin from bodies with minor movements and feasts heavily on fear, pain, and flesh.
Importance: He is freed when Nesta uses the Harp to escape her own wards, inadvertently unlocking Lanthys's cell. He corners Nesta and Cassian, trying to lure Nesta to rule as his “Queen of Queens” to resurrect the Wild Hunt and restore the ancient rule of monsters. He is permanently slain when Nesta uses her Made sword Ataraxia, combined with her silver fire and Cassian's dagger strike.

Stryga (The Weaver of the Wood)

Series: Encountered in A Court of Mist and Fury (Chapter 21) when Feyre enters her cottage on a stealth mission to retrieve Rhysand's mother's ring as a test of her tracking abilities.
About & allegiance: A primordial death-god, twin sister to the Bone Carver, and younger sister to Koschei. She delighted in terrorizing the ancient Fae before being outsmarted by a legendary Fae warrior who tricked her into diminishing her power, confining her to the Middle.
Home or habitat: A dark, thatched cottage made of hair and fat in the Middle—a vast, empty neutral territory dividing the north and south of Prythian.
Physical description: She projects a glamour of a young, supple, exceptionally beautiful woman with long, black hair. Beneath the illusion, her skin is gray, wrinkled, and dry; her nose is caved in, her eyes are rotting black pits, and her mouth consists of deep lines surrounding jagged stumps of rotted teeth.
Abilities: She is a death-god who stays eternally young and beautiful by stealing the lives and drinking the blood of young maidens. She weaves the literal lives, skins, and bodies of her victims on a massive loom. She possesses lethal, heightened senses.
Importance: She serves as Feyre's first major trial of tracking and survival outside Under the Mountain. Later, she is recruited by Helion (acting on a bargain for Rhysand) to fight against Hybern. She is brutally killed in the final battle when the King of Hybern snaps her neck and throws her to his beasts.

Ethereal Spirits & Lesser Fae

Half-Wraiths (Nuala & Cerridwen)

Series: First physically encountered in A Court of Mist and Fury (Chapter 5) when they are assigned as Feyre’s handmaidens in the Night Court.
About & allegiance: Twin sisters who served Under the Mountain as literal shadows to survive Amarantha’s rule. They are highly trusted members of the Night Court spy network under Azriel.
Home or habitat: The town house in Velaris, Night Court.
Physical description: Pretty, dark-haired High Fae twins who appear fully corporeal in the Night Court.
Abilities: They possess the unique “shadow-walking” ability—allowing them to seamlessly walk through solid stone walls, merge into shadows, and travel silently. They are also exceptional cooks and masters of stealth.
Importance: They act as Feyre's gentle companions and teachers, helping her learn to read and shield. They perform crucial covert operations, such as infiltrating the Summer Court castle to assist in retrieving the Book of Breathings.

River-Nymphs

Series: Visually described in the gardens of the Spring Court and the Summer Court.
About & allegiance: Aquatic lesser Fae allied with the Seasonal Courts.
Home or habitat: The rivers, pools, and fountains of the Spring and Summer Courts.
Physical description: Lithe, beautiful water-dwellers with webbed fingers and bone structures that are more pliant than High Fae.
Abilities: Highly agile in water, capable of manipulating small currents.
Importance: Established as part of the diverse, magical populace of Prythian's waterways.

The Suriel

Series: First captured by Feyre Archeron in A Court of Thorns and Roses (Chapter 14) in the Spring Court's western woods to discover the truth behind the blight. Later captured by Feyre in A Court of Mist and Fury (Chapter 50) after Rhysand is shot out of the sky with poisoned arrows. Last encountered in A Court of Wings and Ruin (Chapter 59) where it is ambushed and fatally shot with ash arrows by Ianthe and Hybern guards, tragically passing away in Feyre's arms.
About & allegiance: The Suriel is an ancient, truth-speaking lesser Fae creature that belongs to no Court. It is older than the High Lords, older than Prythian, and older than the bones of the world. They are an ancient, rare species with small numbers. Unlike its terrifying appearance, the Suriel is fundamentally a dreamer that wishes to leave the world a better place than how it was found. It forms a unique, emotional bond of mutual kindness with Feyre Archeron across their encounters, assisting her when no other Fae would.
Home or habitat: The wild forests and woodlands of Prythian, particularly drawn to groves of young birch trees in the Spring Court. It also seeks refuge in neutral territories like the Middle. It possesses a deep-seated hatred for and refuses to cross running water.
Physical description: It appears as a towering, exceptionally tall and thin humanoid figure with a hunched back, its spine's hard knobs clearly visible through thin, tattered dark robes and a dark veil. Its face looks as if it were crafted from dried, weatherworn bone, with skin either forgotten or discarded. It features a lipless mouth with blackened gums holding too-long teeth, slitted holes for nostrils, and eyes that are swirling, milky-white pits of death. It has gnarled, bare feet and spindly, scabby gray arms ending in yellowed, cracked fingernails.
Abilities: Bound by the ancient magic of the world, the Suriel is compelled to answer any question truthfully if successfully snared, though it is notoriously cryptic if questions are not highly specific. It speaks in a strange, layered voice that is at once one and many, old and young, beautiful and grotesque. Despite its skeletal build, it is incredibly swift and powerful, capable of vanishing like a “shadow on the wind” or a “blast of dark”. It is also highly empathic, able to read and sense the thoughts and overwhelming emotions of those nearby.
Importance: The Suriel acts as one of the most critical catalysts in Feyre’s life and the overall plot. In ACOTAR, it reveals to Feyre that Tamlin is a High Lord and warns her of the King of Hybern's decades-long plot to break the Treaty and shatter the wall. In ACOMAF, it saves Rhysand's life by revealing that Feyre's own Dawn-Court-infused blood can cure his bloodbane poisoning, and shatters her world by revealing that Rhysand is her true, rare mating partner. In ACOWAR, it instructs Feyre to use Nesta to scry for the Cauldron and gives her the exact key to decoding the Book of Breathings (the second and penultimate pages). Its tragic death cements Feyre’s resolve to completely destroy Hybern and avenge its passing.

Water-Wraiths

Series: Encountered in A Court of Mist and Fury during the Tithe collection at the Spring Court.
About & allegiance: Lesser Fae of the Spring Court lakes.
Home or habitat: The lakes and rivers of the Spring Court.
Physical description: They possess delicate, pointed faces, lithe frames, spindly webbed fingers, coal-black eyes, and grey mottled skin with gills beneath their ears. Their sensuous lips conceal sharp, jagged pike's teeth.
Abilities: Exceptional swimmers with highly pliable bone structures. They can breathe underwater and use their jagged teeth to tear flesh.
Importance: Feyre encounters three water-wraiths who cannot pay their tax Tithe to Tamlin. To spare them from being hunted down, Feyre secretly pays their Tithe using her own jewelry, marking her first major act of rebellion against Tamlin's cruel laws.

Will-o'-the-Wisps

Series: Mentioned as Solstice guests in A Court of Frost and Starlight.
About & allegiance: Peaceful, ethereal spirits of air and light.
Home or habitat: The high alpine meadows of the Night Court.
Physical description: Slender, dancing slants of pure moonlit light.
Abilities: They can project beautiful, haunting music and celebrate seasonal events by illuminating the dark.
Importance: They provide atmospheric, magical music during the Winter Solstice celebrations in Velaris.

Magical & Domestic Animals

Glowworms

Series: Described in the deep vaults of A Court of Silver Flames.
About & allegiance: Bioluminescent organisms of the Night Court.
Home or habitat: The high stone vaults and treasure chambers of the Night Court.
Physical description: Large, pale blue and turquoise glowing globs.
Abilities: They emit a soft, silken, constant moonlit light without heat, perfect for preserving ancient treasures and books.
Importance: Used to safely illuminate the priceless royal archives of Velaris.

Messenger Foxes

Series: Described in the military camps of A Court of Wings and Ruin.
About & allegiance: Trained tactical couriers of the Winter Court military.
Home or habitat: The snowy outposts of the Winter Court.
Physical description: Sleek, pure-white foxes wearing miniature, embroidered military vests.
Abilities: Exceptionally stealthy and fast, capable of scuttling beneath the feet of giant soldiers undetected to deliver written dispatches.
Importance: Used to maintain secure, swift communications between Winter Court commanders on the battlefield.

Pegasuses (Pegasi)

Series: Encountered in the Day Court during A Court of Wings and Ruin and referenced in A Court of Silver Flames.
About & allegiance: Magnificent, half-tamed winged horses owned and bred by High Lord Helion of the Day Court. According to ancient legend, the species originally originated on the island where the Prison sits.
Home or habitat: The sunlit plains of the Day Court.
Physical description: Magnificent, jet-black stallions with massive, powerful feathered wings.
Abilities: Flight; incredible speed and endurance as royal mounts and beasts of burden.
Importance: Represent the unique, ancient breeds preserved by the Day Court.

Smoke-Hounds (Autumn Court Hounds)

Series: Mentioned in A Court of Silver Flames (Chapter 54) during Eris Vanserra’s hunts.
About & allegiance: Highly prized, magically blessed hunting canines owned exclusively by Autumn Court nobility.
Home or habitat: The forests of the Autumn Court.
Physical description: Sleek, gray, muscular hounds with glowing eyes.
Abilities: They can run as fast as the wind and possess an unmatched, magical ability to sniff out and track down target prey or hidden individuals.
Importance: They accompany Eris during his hunts and are winnowed away alongside him when he is captured by Briallyn's forces.

Winter Court Armored Bears

Series: Deployed during the battle scenes of A Court of Wings and Ruin.
About & allegiance: Massive polar beasts trained and utilized by Kallias’s Winter Court military.
Home or habitat: The frozen ice-plains of the Winter Court.
Physical description: Colossal, white polar bears outfitted in heavy, runed steel armor.
Abilities: Immense physical strength; capable of pulling heavy war-sleighs and acting as devastating frontline shock units that shred enemy lines with their claws.
Importance: They serve as the Winter Court's primary heavy cavalry during the war against Hybern.

Monsters & Beasts of Prythian

The Attor

Series: First encountered in A Court of Thorns and Roses Under the Mountain as Amarantha's cruel executioner, and later interrogated in A Court of Mist and Fury.
About & allegiance: A sentient, monstrous beast allied with the King of Hybern. He served as Amarantha's chief messenger, spy, and torturer.
Home or habitat: The Kingdom of Hybern and Under the Mountain.
Physical description: A skeletal, gray-skinned beast with a serpentine snout, bat-like ears, long clawed limbs, a tail, and giant membranous, bat-like wings. It continuously reeks of carrion and decay.
Abilities: Capable of flight and high-altitude surveillance. It possesses a sadistic intelligence and specializes in physical and psychological torture.
Importance: He tortures Feyre Under the Mountain. In ACOMAF, he is captured by the Night Court in the Court of Nightmares, where Azriel breaks his limbs and wings to send a message to Hybern. Siphon-winged soldiers of his race later lead the devastating attack on Velaris. Feyre eventually kills him, and uses a shard of his bone to bargain with the Bone Carver.

Blue Annis

Series: Mentioned in A Court of Silver Flames (Chapters 20 and 53) as one of the Prison's most notorious and savage inmates.
About & allegiance: A wicked, monstrous female creature captured centuries ago by Cassian and Azriel after a bloody confrontation.
Home or habitat: A heavily warded cell deep within the stone tunnels of the Prison.
Physical description: A terrifying, cobalt-skinned monster with long, razor-sharp iron claws.
Abilities: She has a specific taste for female flesh and slowly feasts on her victims. Her iron claws are sharp enough to shred through Illyrian armor.
Importance: She nearly killed Cassian, shredding his chest to his heart before Azriel intervened to capture her. Nesta and Cassian pass her cell during their descent to retrieve the Harp, hearing her iron nails scraping against the stone door.

The Bogge

Series: Encountered in A Court of Thorns and Roses (Chapter 10) when Feyre and Lucien ride through the Spring Court woods.
About & allegiance: Lesser, shadow-like faeries spawned by the primordial death-lord Lanthys.
Home or habitat: The wild, unmapped woods of the Spring Court and neutral territories.
Physical description: They have no solid physical form initially, existing only as a creeping, shimmering cold mass in the corner of one's vision.
Abilities: They exist as a creeping, leeching cold that whispers horrific threats into a victim’s mind. They only become real, physical, and lethal once they are looked at or acknowledged; ignoring them keeps them harmless. Their bite contains a poison that slows the natural healing of High Fae.
Importance: Lucien forces Feyre to stare straight ahead and ignore the cold whispers of the Bogge as it circles them, preventing a fatal attack. Tamlin later hunts down and kills the beast, sustaining a slow-healing bite wound.

Bryaxis

Series: Encountered in A Court of Mist and Fury (Chapter 50) when Feyre descends to the bottom of the library to strike a bargain for the upcoming war.
About & allegiance: An ancient, sentient being of pure nightmare and fear. It was captured and confined beneath the library of the House of Wind. Uniquely, it took pity on the traumatized priestesses seeking sanctuary in the library and never harmed them. It allies with the Night Court during the war against Hybern.
Home or habitat: The pitch-black, bottom level of the library of the House of Wind in Velaris.
Physical description: It has no permanent physical form. It manifests as a massive, roiling cloud of living shadows that constantly shifts to produce claws, fangs, wings, and muscle.
Abilities: It projects the raw face of its victim's deepest, most primal nightmares and fears. It feeds extensively on fear and dread, drinking it in until sated.
Importance: Feyre bargains with it: it agrees to terrorize and slaughter the forces of Hybern in exchange for a window carved into its dark library home so it can see the sun, moon, and stars. In A Court of Silver Flames, it is currently loose in the world, having escaped after the war, leaving the Night Court searching for it.

Kelpies (Water-Horses or Nixies)

Series: Encountered in A Court of Silver Flames (Chapter 37) when Nesta Archeron is dragged into the waters of Oorid during a recovery mission.
About & allegiance: Ancient, shape-shifting water monsters that dwell in Oorid's black lakes. Historically, ancient Fae populations offered living sacrifices to them. They are currently aligned with the dark forces of the Middle.
Home or habitat: The black, bottomless lakes and underground waterways of the Bog of Oorid in the Middle.
Physical description: They appear as pale, humanoid males with too-wide mouths, jagged rotted teeth, obsidian hair, and four-jointed fingers ending in dagger-sharp, claw-like nails.
Abilities: They speak the ancient, dead language of the First Fae from fifteen thousand years ago. They have the horrifying ability to breathe air into their victims' lungs to keep them alive longer during drowning before devouring them, leaving only the entrails.
Importance: A kelpie corners Nesta in the Bog of Oorid, dragging her into the freezing water to make her its “bride before you are my supper”. Nesta uses her silver fire and commands the Mask to summon the dead, escaping its clutches.

Lightsingers

Series: Mentioned as a legendary danger of Oorid in A Court of Silver Flames.
About & allegiance: Carnivorous, deceptive spirits of the bog lands.
Home or habitat: The deep, misty marshes of the Bog of Oorid in the Middle.
Physical description: Ethereal, beautiful, glowing beings who project friendly, familiar faces to lost travelers.
Abilities: They utilize powerful illusions of light and facial glamour to lure unsuspecting travelers into their embrace. Once touched, they reveal a horrific, monstrous true face.
Importance: Established as one of the active, terrifying anomalies of the Bog of Oorid that Nesta and Cassian must avoid.

Martax

Series: Mentioned as a persistent border threat to the mortal lands in A Court of Thorns and Roses.
About & allegiance: Predatory beasts of Prythian that frequently slip through the gaps in the magical wall to hunt humans.
Home or habitat: The wild borderlands dividing Prythian and the human realm.
Physical description: Fierce, bear-sized beasts possessing lion-like heads.
Abilities: They have three rows of teeth sharper than a shark's. They are exceptionally brutal hunters, known to leave human victims in literal ribbons.
Importance: Serves to establish the constant, lethal threat that Fae beasts pose to defenseless mortals living near the wall.

The Middengard Wyrm

Series: Encountered in A Court of Thorns and Roses during Feyre’s grueling first trial Under the Mountain.
About & allegiance: A massive, ancient subterranean beast captured and kept by Amarantha in her muddy trenches as a cruel instrument of execution.
Home or habitat: The deep, packed-mud trenches Under the Mountain.
Physical description: A colossal, blind subterranean worm with a giant circular mouth lined with ring after ring of razor-sharp, flesh-shredding teeth.
Abilities: It is entirely blind but possesses an incredibly acute sense of smell to track its prey. It devours its victims swiftly, leaving behind only a slime-trail of mud and sucked-clean bones.
Importance: It serves as Feyre's first trial Under the Mountain. Feyre brilliantly defeats it by dousing herself in the rancid mud of the trench to mask her scent, rendering her “invisible” to the beast. She then builds a bone-spike trap, baiting the Wyrm into charging and impaling itself.

Naga

Series: First encountered in A Court of Thorns and Roses (Chapter 15) when Feyre and the Suriel are ambushed in the Spring Court woods.
About & allegiance: Cruel, shadow-dwelling lesser faeries spawned from shadow, hate, and rot. They serve the King of Hybern and are known to slip through the magical wall to hunt and slaughter mortals.
Home or habitat: Deep, dark woods and shadow-filled corners of Prythian.
Physical description: They possess humanoid male bodies covered entirely in dark scales. Their powerful arms end in polished black, flesh-shredding talons. They have serpentine faces with huge, amber almond-shaped eyes, razor-sharp teeth, and long, silvery forked tongues. They reek of carrion.
Abilities: Excellent trackers who hunt by scent and shadow. They possess immense physical strength and use their razor talons to tear skin and bleed their victims “nice and slow”.
Importance: They ambush Feyre in the woods after she captures the Suriel. Feyre manages to kill one by stabbing it in the neck, and Tamlin arrives in his beast form to violently slaughter the rest, saving her life.

Naga-Hounds

Series: Encountered in A Court of Wings and Ruin during the frontline battles against Hybern.
About & allegiance: Magically bred beast-cousins of the naga, utilized exclusively by the King of Hybern's armies.
Home or habitat: The war-camps of Hybern.
Physical description: Large, four-legged scaled hounds with serpentine faces and rows of jagged teeth.
Abilities: Possess a powerful, bone-shredding bite and exceptional speed, trained to hunt down retreating infantry.
Importance: Deployed as frontline attack beasts by Hybern, clashing with the High Fae infantry.

Onyx Beasts of the Hewn City

Series: First described visually in A Court of Mist and Fury during Feyre’s visits to the Court of Nightmares, and later referenced in A Court of Silver Flames.
About & allegiance: Ancient, magical stone guardians carved into the architecture of the Hewn City. Historically, they served as the active hunting hounds of the Wild Hunt.
Home or habitat: Carved into the massive pillars and stone gates of the Hewn City.
Physical description: Massive, scaled, winged beasts carved from solid onyx.
Abilities: Statues that can be animated by High Lord magic; highly lethal, bone-crushing jaws and stone scales.
Importance: They stand as a silent, threatening testament to the ancient, dark magic of the Court of Nightmares and the legacy of the Daglan.

Puca

Series: Referenced in A Court of Thorns and Roses (Chapter 10) by Alis and Tamlin after Feyre’s near-fatal encounter.
About & allegiance: Minor, light-shimmering trickster faeries of the Spring Court.
Home or habitat: The rose gardens and forested boundaries of the Spring Court.
Physical description: Ethereal, shimmering figures that shift and dance in the shadows.
Abilities: They utilize a victim's deepest inner desires to lure them into remote, dangerous locations. They are exceptionally swift, capable of darting through the dark like lightning.
Importance: Feyre is nearly lured into the dangerous woods by a puca before being scolded by Alis and Tamlin for her human ignorance.

Seven-headed Lubia

Series: Mentioned in A Court of Silver Flames (Chapter 20) by Cassian.
About & allegiance: An ancient ocean monster captured and imprisoned by Cassian.
Home or habitat: The Prison (formerly the deep, dark ocean caves along the western coast of Prythian).
Physical description: A massive, seven-headed sea beast.
Abilities: She targeted young girls along the coast, possessing the ability to swallow her prey entirely whole and swift.
Importance: Used as an example of the near-primordial horrors Cassian successfully hunted and jailed in the Prison.