Oathbound
by Tracy Deonn
Contents
Overview
Oathbound follows Briana Matthews after she leaves the Legendborn Order and places herself under the power of the ancient Shadow King. Stripped of Excalibur, cut off from safety, and bound by a dangerous bargain, Briana must learn to control a volatile form of ancestral power while trying to protect the people she can no longer fully reach.
Beyond Briana, the story follows Nicholas Davis, William Sitterson, Mariah, Valec, Natasia Kane, Selwyn Kane, and others as they respond to her disappearance and uncover overlapping threats from the Order, rogue demons, Morgaines, and those exploiting Rootcraft. The book centers on power, memory, inherited trauma, chosen loyalty, and the cost of survival inside systems built to control gifted people.
Plot Summary ⚠️ Spoilers
Briana Matthews leaves the Northern Chapter with the Shadow King believing she has bargained for Selwyn Kane’s safety and her own training, but she quickly learns how thoroughly he has trapped her. Wearing the stolen identity of Erebus Varelian, he takes Excalibur from her, threatens everyone she loves, and reveals that she owes him an undefined debt. At the murdered Erebus’s house, Briana meets his cambion wards, Zoe and Elijah, whose attempt to feed on her exposed root magic teaches her that her power makes her visible prey. Erebus explains that her bloodmark comes from Vera’s old bargain and protects his claim on her bloodline, then forces her through brutal lessons in sealing, shaping, and weaponizing her root.
Erebus’s most devastating intervention is not physical training but erasure. Briana wakes unable to remember living loved ones: her father, Nick, Alice, Selwyn, and others survive only as feelings. Erebus claims this loss is irreversible and uses her isolation to force a breakthrough, helping her forge controlled purple protective constructs. As the months pass, Bree becomes more capable and more dangerous. She hunts demons with Zoe and Elijah, learns more about Nightshades, warlocks, and the Shadow King’s stolen crown, and encounters a kidnapped young Rootcrafter girl. When Bree suspects Rootcrafter girls are being hunted for their power, her mistrust of Erebus deepens, especially after she believes he may have fed on the girl.
At Northern, Nick, William Sitterson, and Lark regroup after Bree and Selwyn vanish. Nick uses an old curia oath to force the Regents to grant him a protected quest against the Morgaines, while publicly condemning the Order’s racism, misogyny, torture, and abuse of Bree. William and Lark accompany him, but the quest becomes a cover for Nick’s deeper search for answers from Ava and the Morgaines. Meanwhile, William secretly moves the comatose Alice Chen to Mariah, Lucille, Hazel, and Valec for protection. Mariah later discovers that Alice is suspended between life and death, trapped reliving the battle at Volition and trying to change the moment she was wounded.
Selwyn’s story unfolds with Natasia Kane, his mother, after Erebus delivers him to her in advanced demonia. Natasia records his violent transformation, her failed treatments, and her guilt over abandoning him, later revealing that Martin Davis and Isaac Sorenson had threatened to mutilate Selwyn if she returned. Selwyn eventually speaks, rejects her explanations, and reveals that Nicholas and Martin were never true Arthur heirs. When Natasia returns from Daeza’s club carrying Bree’s scent, Selwyn reacts violently and reveals that Bree is his true Scion of Arthur and that Faye Matthews had been Natasia’s rightful Scion. Natasia realizes Selwyn’s condition worsened because he consumed Bree’s power, making his desire to find her dangerous.
Bree, Zoe, and Elijah defy Erebus by seeking Daeza, a rogue Shade, for information about the Shadow King’s crown. Daeza reveals that Mikaelaz, also called Mikael, has the crown and will auction it at Penumbra. Erebus, who has secretly been maneuvering events, sends Bree and Zoe to infiltrate the gala while keeping Elijah as collateral. At Penumbra, Bree unexpectedly collides with Nick, who is there under a false identity with Ava and Mariah. Bree cannot remember him, but her body and emotions recognize him. Forced to pose as an engaged couple, Bree and Nick navigate Mikael’s deadly communions, where he feeds on coerced confessions, while Zoe, Mariah, and Ava complicate the mission.
Penumbra exposes multiple agendas. Ava admits the Morgaines once guarded the crown and that she manipulated Nick. Nick reveals he carries a shard of the Shadow King’s crown in his chest, placed there by Ava at his request so he can pull Arthur’s spirit out of Bree if Arthur ever possesses her again, even if it kills him. Mikael auctions the crown, which Ava wins, but the final lot proves more urgent: vials of living Root taken from four kidnapped Rootcrafter girls. Regent Gabriel wins access to the girls, revealing that a faction of the Order is experimenting on Rootcrafters. During the ensuing chaos, Mariah unleashes major Root power, Gabriel escapes, and Bree, Nick, Zoe, and Mariah are captured.
In prison, Lawson reveals himself as Erebus in disguise. He explains that he used the crown hunt to flush out Morgaines, test Bree and Zoe, observe Nick, and expose the Regents’ interest in Rootcraft. Valec and Emil rescue the group by tunneling into the cell, and Nick’s crown shard senses the true crown nearby. Bree retrieves it, then deduces that Gabriel likely hid the missing girls at the Institute. William and Lark rescue Nora Green, Joy, Melanie, and Amber, confirming that Gabriel and a doctor took their blood. Valec examines Bree and discovers the greater wound: by burning her ancestral stream, Bree fractured her soul, leaving a piece vulnerable for Erebus to take. Her lost memories are tied to that stolen fragment.
After the rescued girls reunite with their families, Bree receives comfort from Nick and reconciles with Valec. Edwin Matthews arrives with Natasia, and Bree reunites with her father despite her missing memories. Natasia warns that Selwyn has escaped and is tracking Bree’s root. The group creates decoys from Bree’s durable root construct while Valec, strengthened by Hazel’s ritual, sees that Bree’s soul may be restorable if both Bree and Erebus agree. Bree calls Erebus and offers him mercy in exchange for a meeting.
At Penumbra, Bree, Nick, and Mariah confront Erebus. Bree offers the crown for her soul fragment, but Erebus changes the bargain and threatens Alice’s fate in purgatory. With Nick stripping Morgaine enchantments from the crown and Mariah exposing the shadows of Erebus’s consumed victims, Bree realizes their bloodmark connection runs both ways and compels him to restore her soul. She chooses her own wholeness even knowing Alice may remain lost, and her memories, emotions, root magic, and love for Nick return. Selwyn then arrives, wounds Erebus, and drives him off. But Sel becomes fascinated by the crown. Despite warnings, he touches it. At first he seems dead, then the crown transforms him instead of killing him, proving it recognizes him as its rightful heir. Selwyn is revealed as the Shadow King’s son, leaving Bree and Nick facing a new and dangerous power.
Characters
- Briana MatthewsThe Scion of Arthur and central protagonist, also called Bree, whose bargain with the Shadow King costs her Excalibur, memories, and part of her soul. Her arc follows her transformation from hunted heir into a self-directed leader who uses Bloodcraft, root, and hard-won alliances to resist both the Order and demonic control.
- Erebus Varelian / the Shadow King / ArawnAn ancient demon king impersonating the murdered Merlin Erebus Varelian and manipulating both Bree and the Order. He trains Bree, marks her, steals her soul fragment, seeks his stolen crown, and tries to shape her into a ruthless weapon for his own restoration.
- Nicholas DavisThe Scion of Lancelot, Bree’s ally and love interest, who uses an old curia oath to escape Regent control and pursue hidden answers. He carries a shard of the Shadow King’s crown as part of a self-sacrificial plan to save Bree from Arthur’s possession.
- Selwyn KaneNick’s Kingsmage and Bree’s true Arthur-bound protector, whose consumption of Bree’s power drives him into advanced demonia. His return culminates in the revelation that the Shadow King’s crown recognizes him as its rightful heir.
- ZoeA balanced cambion and one of Erebus’s wards, paired closely with her twin Elijah. She begins as Bree’s watcher and hunter but becomes her ally, helping infiltrate Penumbra and confront the exploitation of Rootcrafter girls.
- ElijahZoe’s twin and fellow balanced cambion ward of Erebus. He helps train and guard Bree, provides demon-world intelligence, and becomes collateral in Erebus’s plan to force Bree and Zoe to retrieve the crown.
- William SittersonThe Scion of Gawain and a healer who supports Nick, protects Alice, and helps rescue the abducted Rootcrafter girls. His chapters expose the Order’s cruelty and his growing willingness to break its rules for his friends.
- LarkA Mageguard and cambion ally who travels with Nick and William on the sanctioned quest. Lark challenges William’s self-neglect, helps uncover Regent experiments, and participates in rescuing the kidnapped Rootcrafters.
- MariahA Medium connected to the Rootcrafter community who helps protect Alice and later infiltrates Penumbra. With the Heart of the Grand Dame amplifying her abilities, she sees liminal and undead energies, restrains warlocks with Root, and helps expose Erebus’s consumed victims.
- ValecA cambion broker tied to the Crossroads Lounge and the Rootcrafter community. He searches for Bree, rescues her from Erebus’s prison, reveals his Nightshade ancestry, and discovers that Bree’s lost memories are tied to a fractured soul.
- Natasia KaneSelwyn’s mother, a transformed Merlin who tries to treat his demonia after Erebus delivers him to her. Her recordings reveal the Order’s damage to Merlins, her coerced absence from Selwyn’s life, and Bree’s significance as Selwyn’s true Scion.
- Alice ChenBree’s best friend, left in a death-adjacent stasis after the battle at Volition. Her condition drives William’s secret transfer to Rootcrafter care and later becomes leverage when Arawn threatens to keep her trapped in purgatory.
- Edwin MatthewsBree’s father, whose memory and safety become leverage against Bree. After Natasia restores his knowledge through Faye’s preparations, he comforts Bree and helps her understand love and grief as practices she can reclaim.
- Faye MatthewsBree’s late mother, remembered through Rootcraft preparations, Edwin’s ring, and Natasia’s past. She is revealed as a true Scion of Arthur whose hidden choices continue to protect and guide Bree.
- VeraBree’s ancestor whose plea to the dead created the inherited bargain tied to Bree’s Bloodcraft and bloodmark. Her legacy shapes Bree’s understanding of ancestral power, protection, and inherited cost.
- HazelA powerful Rootcrafter healer and Magnifier who cares for Alice and supports Bree’s allies. She diagnoses Alice’s liminal condition, helps strengthen Mariah and Valec’s abilities, and offers Bree a model of practical, protective care.
- LucilleMariah’s aunt and a Grand Dame whose Heart becomes central to Mariah’s expanded Medium abilities. She helps shelter Alice, Bree, and the rescued Rootcrafter girls while grounding the Rootcrafter community response.
- Emil RichardsonA Rootcrafter cousin who reports missing girls and later helps rescue Bree’s group by tunneling into Erebus’s prison. His suspicion of Valec exposes community prejudice against cambions, but he also aids the Rootcrafter rescue effort.
- Nora GreenThe kidnapped Rootcrafter girl Bree first sees at the Rat and later helps rescue from Gabriel’s operation. Nora confirms how warlocks abducted the girls, kept them casting, and allowed the Order to take their blood.
- JoyOne of the abducted Rootcrafter girls rescued from Gabriel’s faction. Her reunion with her family shows the human stakes of Bree’s decision to prioritize the girls over the crown.
- MelanieOne of the rescued Rootcrafter girls taken for her active Root. She is part of the evidence that Gabriel’s faction is experimenting on Rootcrafter blood.
- AmberOne of the rescued Rootcrafter girls held by Gabriel’s people. Her survival reinforces the importance of Bree’s deduction about the Institute.
- AvaA Morgaine operative who draws Nick into a secret bargain and manipulates events at Penumbra. She helps embed the crown shard in Nick and seeks the Shadow King’s crown for Morgaine power and control.
- DaezaA rogue Shade who runs Eclipse and trades information about the Shadow King’s crown. She exposes Valec and Mariah’s disguise, points multiple groups toward Mikael’s auction, and treats demon politics as leverage.
- Mikaelaz / Mikael Di CentaA Nightshade broker who hosts the Penumbra Collectors’ Gala and feeds on coerced confessions. His auction of the Shadow King’s crown and captured Root exposes the overlap between demon trafficking, wealthy Collectors, and Regent interests.
- BiancaMikael’s human warlock second-in-command and security leader at Penumbra. She manages wards, guests, accommodations, and investigations during the locked-down auction.
- RegazelA goruchel informant who meets Zoe and Elijah at the Rat. His information about Daeza and the crown binds the twins to a risky demon bargain.
- Regent GabrielA Regent who appears at Penumbra, wins access to the captive Rootcrafter girls, and escapes with evidence of the Order’s interest in Rootcraft. His actions reveal that Regent factions are experimenting with Bree’s blood and Rootcrafter power.
- Regent CestraA Council Regent who mocks Nick, reinforces the Order’s coercive tactics, and weaponizes quest traditions against him. She represents the Regent power structure that Bree and Nick increasingly reject.
- Lord Regent AldrichThe High Regent who presides over Nick’s curia with contempt for the old ritual. He is forced to grant Nick’s quest but helps constrain it through Order tradition.
- Regent SerrenA Seneschal-aligned Council figure who blocks Erebus from stopping Thompson’s attack on Nick. His intervention shows the fractures and opportunism within the Order’s leadership.
- Donovan ReynoldsThe former expected Scion of Lancelot, displaced by Nick’s revealed lineage. He resentfully teaches Nick that Lancelot’s visions are triggered by Arthur’s Scion and may exist to oppose Arthur if needed.
- ThompsonA Mageguard grieving Maxwell Zhao who tries to assassinate Nick during the curia. Later, he carries evidence that the Regents are seeking Morgaine samples in specific magical states.
- Maxwell ZhaoA Mageguard whose death drives Nick’s confession and Thompson’s revenge attempt. His killing becomes a public charge used by the Council to question Nick’s trustworthiness.
- Martin DavisNick’s father, revealed through William and Natasia’s accounts as abusive and complicit in controlling both Nick and Selwyn. His actions help explain Nick’s distrust of the Order and Natasia’s long separation from Selwyn.
- Isaac SorensonA Merlin tied to Martin Davis who attacked Natasia and helped threaten Selwyn’s safety. His role clarifies that Natasia’s absence from Selwyn was enforced by fear and coercion.
- Samira MillerA Bedivere Liege who helps William navigate Northern’s restrictions and hears his dangerous request concerning Alice. She functions as a trusted ally within the compromised Order setting.
- Risa TakadaThe Northern Chapter Merlin who reinforces harsh affective wards around Nick’s prison. Her actions demonstrate the Order’s punitive approach to containment and fear.
- Gillian HanoverA Liege of Kay and one of Nick’s former trainers. She recognizes Nick’s restraint during Thompson’s attack and helps show the depth of his combat training.
- Greer TaylorA Southern Chapter Squire who challenges the Council over Bree’s treatment during Nick’s curia. Greer’s reactions show how Bree’s absence continues to provoke dissent inside the Order.
- FelicityThe Scion of Lamorak and a Southern ally who condemns betrayals within the Chapter. She helps mark the Southern group’s fracture from Regent authority.
- TorA Southern Legendborn member distrusted by the group for past betrayals involving Bree and the Legendborn cause. Tor’s presence reflects the unresolved divisions inside the Southern Chapter.
- OpheliaA former Scion and Liege of Geraint guarding Edwin Matthews’s house when Natasia intervenes. Her confrontation with Natasia shows how Edwin has become a target surrounded by competing protectors.
- LyssOphelia’s bonded Liege, who sees through Natasia’s glamour at Edwin’s house. She is subdued during Natasia’s effort to protect Edwin from Mageguard.
- PearlValec’s mother, invoked by Valec as his true parent despite Daeza’s interest in his Nightshade sire. Her significance lies in Valec’s refusal to define himself by demon lineage alone.
- MorgaineThe historical sorceress whose experiments with shards of the Shadow King’s crown created Enthralling and Morgaine power. Her legacy shapes Ava’s magic, Nick’s hidden shard, and the crown’s long concealment.
- Arthur PendragonBree’s legendary ancestor and the source of the Arthur Scion burden. His prior possession of Bree drives Nick’s plan to use the crown shard to remove Arthur if he ever takes her again.
Themes
Tracy Deonn’s Oathbound is driven by the question of what a person owes: to blood, to history, to power, to loved ones, and to herself. Across Bree’s captivity, Nick’s quest, Selwyn’s transformation, and Mariah’s widening courage, the novel treats oaths not as noble abstractions but as living bonds that can protect, imprison, or deform the soul.
- Power, consent, and the theft of self. Bree’s bargain with the Shadow King begins as an attempt to gain “strength, power, and control,” but it becomes a study in coercion. Erebus takes Excalibur, exploits her open debt, monitors her through the bloodmark, and ultimately holds a fragment of her soul. The abducted Rootcrafter girls mirror Bree’s violation: their Root is harvested, bottled, and sold, turning inherited magic into commodity. The book repeatedly asks whether power gained through harm can ever be liberating.
- Memory, identity, and love as practice. Bree’s erased memories are not simple forgetfulness; they sever her from the daily relationships that made her whole. Her father, Nick, Alice, Sel, and her friends remain as emotional traces before returning in full force. Edwin’s lesson that love is a practice gives the theme its human center: identity is not only ancestry or destiny, but the ongoing work of remembering, choosing, and caring.
- Institutional violence and inherited systems. The Order’s racism, misogyny, secrecy, and sacrificial logic are exposed through Nick’s curia, William’s memories of the Institute, the Regents’ experiments on Rootcrafters, and the abuse hidden behind training and oaths. Nick’s refusal to let Bree be the only one who names the Order’s sins marks a shift from individual survival to collective accountability.
- Ancestry as burden and resource. Bree’s Bloodcraft legacy, Vera’s bargain, Faye’s preparations, Hazel’s Rootcraft, and Mariah’s Medium gifts all complicate inheritance. Ancestors offer protection and knowledge, but also unfinished debts. Bree’s burning of the ancestral stream is devastating because it breaks connection, yet her queen-of-the-night construct suggests a new model of lineage: blooming in darkness, not merely repeating old patterns.
- Monstrosity, humanity, and chosen allegiance. Selwyn, Natasia, Valec, Zoe, and Elijah all trouble the boundary between demon and human. The novel resists easy categories: the Order can be monstrous while demons can love, grieve, and protect. Sel’s final revelation as the Shadow King’s son sharpens the central tension—blood may define power, but choices will determine what kind of prince, knight, or king survives.