Return of the Runebound Professor recap

After dying on Earth, teacher Noah Vines awakens in the poisoned body of the disreputable Magus Vermil and discovers that the master rune Sunder binds his resurrection to a gourd. At Arbitage, he uses Vermil's identity to learn magic while genuinely training neglected students Todd and Isabel. An apparent skinwalker named Lee becomes his ally and is later revealed as a lesser demon released by Vermil's failed summoning. Noah kills the Hellreaver, inherits its Combustion rune, reaches rank two, and uses Sunder to perfect a pyroclastic resonance rune. The kill brings an Arbitage investigation, while Vermil's brother Brayden reveals that their father expected a demon-related assignment to alter Vermil's fate. Noah travels toward Linwick territory with his students, Lee, Brayden, Allen, and Edward. Moxie and Emily remain outside the territory to train. The book ends at the gates of Linwick city, where Noah intends to confront Vermil's father and uncover the unfinished summoning plan.

Earth teacher Noah Vines dies and is selected for reincarnation by Renewal, but a many-voiced black entity attacks during the process. Noah retains his memories and awakens in the recently dead body of Magus Vermil, who appears to have been poisoned by a supposed healing potion. After a monster kills him in the Scorched Acres, Noah repeatedly reforms beside Vermil's gourd. He confirms that the vessel anchors his return and learns that killing monsters restores energy. Rescuers take him to Arbitage, where he claims memory loss and assumes Vermil's identity. Vermil was a protected but disreputable rank-one professor who rarely taught and mistreated students. Noah chooses teaching as both cover and a route to understanding magic. His only students, Todd and Isabel, initially expect the old arrangement of neglect and corruption, but respond to Noah's first-principles lesson. They explain rune slots and advancement. Examining Vermil's soul, Noah finds seven ordinary runes and an anomalous eighth rune called Sunder, apparently connected to the force that disrupted his reincarnation.

Noah learns that monster kills charge individual runes and begins rebuilding Vermil's weak set around wind, ash, and vibration. Moxie, a hostile magus who knew Vermil, gives him basic rune information after a skinwalker incident leaves Noah with leverage over her. Todd and Isabel reveal that Vermil normally took payment to falsify their examination, which requires each student to kill a slasher. Noah instead offers a month of real training. Their fire and sword abilities are promising, but both rely on slow, costly shields and initially freeze against live monsters. Noah studies monster patterns through dangerous hunts and repeated deaths, discovering that every death leaves accumulating damage in his mind or soul. His demonstrations help the students understand that slashers can be predicted, and both begin defeating smaller monsters without shields. During a later training trip, a rock-throwing Chucker gravely wounds Noah. Under pressure, he discovers that ash magic can shape the burned surroundings into lethal spikes. He kills the monster, dies, and returns to his gourd, only to find that the body he left behind has vanished.

Noah reunites with Todd and Isabel and continues preparing them for the exam while investigating the cost of his resurrection. Damage from repeated deaths causes hallucinations and a reflexive attack on Tyler, but the condition recedes as Noah avoids dying and his soul heals. He secretly shares Vermil's greater-rune book with his students, allowing Todd to copy a greater fire rune and Isabel a greater stone rune. They replace weaker runes and learn to kill slashers as a coordinated team. Noah buys a cheap flying sword, develops vibration magic, and hunts stronger monsters to build energy and income. Moxie's lessons show him how much access noble students receive compared with Todd and Isabel. During a large vibration test in the Scorched Acres, Noah uproots trees and empties his vibration rune. He then discovers a huge burning ape within a contained ring of fire. Sunder reacts to it, identifying the creature as the Hellreaver. When it opens its eyes, Noah recognizes the same gaze he saw inside the damaged region of his mind. He is trapped inside the ring with much of his equipment outside and his strongest tested rune depleted.

The Hellreaver kills Noah, but he delays his return long enough to memorize its location. Back at Arbitage, Noah finds Edward threatening Isabel and breaks the Linwick student's nose. Tim warns that someone may be tracking Noah's regular travel pattern. While Todd and Isabel approach exam readiness, the missing corpse reappears as a second Vermil standing beside Todd. The duplicate is an apparent skinwalker that knows Noah returns from death. Noah protects his secret by calling it a clone, then accepts a reciprocal rune oath that prevents the creature from exposing his revivals or attacking unprovoked humans. Edward's mentor, Allen, responds to the library incident by arranging an exam contest between Edward and Isabel, with a greater rune at stake. The apparent skinwalker takes the name Lee and agrees to watch for sabotage. During the exam, Todd passes by killing a slasher. Allen delays Isabel, and Edward attacks her while she engages another monster, but Lee secretly moves her to safety. Isabel passes and gains more kills than Edward. Allen honors the wager, allowing her to take a rune page from his grimoire. Both Todd and Isabel officially pass.

Moxie concludes that Noah is not the original Vermil and learns that the body's former owner was poisoned, though Noah keeps Sunder and his full history secret. She agrees to exchange information and let Emily join Noah's expanded class. Noah attacks the Hellreaver again and dies, then learns from Lee that master runes are unique powers with inverse passive effects. He identifies Sunder as the source of the binding that returns him to the gourd. Lee enters Arbitage as an unofficial physical-combat instructor and demonstrates exceptional speed, flexibility, and body imbuement. Moxie accepts the arrangement, and the class begins preparing for a later three-day survival examination. Seeking stronger wind runes, Noah travels to Windscorned Plateau with rune-collecting paper. The local woolly monsters resist his wind and vibration attacks. Noah calls a small amount of Sunder for the first time, bisecting one creature but suffering severe internal damage and another death. After further training with Lee, he returns to the plateau and successfully captures a greater wind rune. He now has the resource needed to upgrade his magic and renew his attempt to kill the Hellreaver.

Noah converts his remaining weak wind runes into greater ones and returns to the Scorched Acres. The Hellreaver proves able to burn away ash and remove the air, preventing both breathing and wind magic. Lee follows and challenges Noah's willingness to treat his deaths as expendable. After several failed attacks, Noah prepares Sunder before entering the fight, uses ash to remain mobile without air, and reaches the monster despite another mental assault. Sunder decapitates the Hellreaver. Its falling body kills Noah, while the victory fills his runes enough for rank two and triggers a beacon. Lee removes Noah's nameplate before investigators arrive. Arbitage concludes that a group killed the monster and stole its master rune, and enforcer Neir orders Noah not to leave the academy, although Tim convinces him that rank-one Vermil could not be responsible. Noah discovers that he inherited the Hellreaver's fire-producing master rune and its air-stilling passive. Brayden then arrives as Vermil's elder brother and asks why Vermil survived a family task. Noah privately admits the Hellreaver kill to Moxie under a narrow oath, while the hidden Linwick assignment becomes the next immediate danger.

Moxie supplies a Linwick family reference and promises to care for Todd and Isabel if Noah cannot continue. Noah uses Lee and alcohol to question Brayden without remaining impaired, learning that their father tied Vermil's task to a long-planned summoning and an election meant to elevate their family branch. The intended result of Vermil's apparent death remains unclear. Lee then reveals that she is a rank-three lesser demon, not a skinwalker. Vermil's flawed summoning bound arrivals to his will and trapped them in the Scorched Acres, while Noah's command accidentally freed her. She stayed from loyalty and believes the stronger demon Vermil intended to summon may also have escaped. Noah decides to approach the Linwicks while posing as a demon contained in Vermil's body. Todd and Isabel learn about the Hellreaver and the possible demon threat, then consider joining the journey voluntarily. Preparing for the trip, Noah combines two wind, two ash, and three vibration runes. The result is an imperfect rank-two pyroclastic resonance rune that controls sound, heat, smoke, and air-related effects. He has finally advanced, but plans to use Sunder to improve the combination.

Noah confirms that Sunder can split a completed rune combination back into its seven components without destroying them. By storing runes in his grimoire, he gains a unique way to test and revise combinations. Moxie discovers Lee's demonic nature and tries to have her killed, forcing Noah to defeat and restrain Moxie without lethal force. After speaking privately with Lee, Moxie accepts that Lee's conduct contradicts the danger she expected and apologizes. Lee promises not to harm the students, and the two agree to rebuild trust. Todd and Isabel choose to accompany Noah toward Linwick territory, while Moxie and Emily join for the part of the route they can safely travel. Noah deceives Brayden into believing the Hellreaver is contained within him and asks to meet their father. Allen and Edward unexpectedly join the party, preserving the hostility created by the exam dispute. During the overland journey, Lee begins teaching gradual body imbuement. Moxie secretly reports to Magus Evergreen, a senior authority in her house. Evergreen orders her to exploit the Linwick connection and reminds her that protecting Emily and serving the house take priority over teaching or personal loyalty.

The traveling party continues training while crossing monster territory. Noah studies local snufflers, blind burrowers that track movement through the ground, and uses them as supervised opponents. Todd displays effective but painful fire-based body imbuement, Emily defeats one with an ice and water bow, and Isabel develops reinforced stone armor and weapons while secretly practicing alone. Lee covertly protects Isabel from a more dangerous aerial monster. The group then encounters Gavin, an Arbalest Empire soldier fighting a root fiend with heavily imbued equipment. His partner Jess arrives by portal and explains that her environmental-energy imbuements power much of his gear. When two more root fiends awaken, Gavin and Jess take one while Noah's party holds the other. Brayden shields the students from underground roots, Allen restrains the creature with ice, and Moxie binds it with vines. Noah fills its body with ash and smoke, then uses the Hellreaver's Combustion rune to destroy it from within. Gavin and Jess kill the other fiend. They acknowledge the danger their operation caused, offer Noah possible future help, and depart as the party resumes its journey.

At a village stop, Moxie explains that professors are mentors and researchers rather than merely combat instructors. She also describes rank-four domains and the longer lives available at higher ranks. Noah realizes that Sunder might eventually help both Moxie and Lee overcome dangerous advancement barriers, but keeps that possibility secret until the Linwick confrontation is resolved. He learns how noble control and counterfeit sales restrict access to reliable runes, and how badly unbalanced combinations can damage a mage's body. Noah begins imbuing pyroclastic resonance into his lungs and places Combustion into his soul, developing controlled fire-breath, inert air near his skin, and explosive attacks delivered through smoke. Todd's unexpectedly fluent advice about body imbuement makes Noah suspect the student has concealed part of his experience. Before the group crosses the Deadlands, Noah uses Sunder to dismantle his partly filled rank-two rune while preserving its energy. He rebuilds pyroclastic resonance from three vibration, three wind, and one ash rune. The redesigned combination is perfect, expands his soul, and leaves him with a stronger foundation for later magic.

The party enters the Deadlands, where a pale worm drags Brayden underground. Moxie and Isabel defend the group while Todd's fire and Allen's ice prove ineffective against it. Brayden kills the creature from inside by striking its three hearts, and everyone survives. After leaving the Deadlands, Noah completes a cleaner pyroclastic resonance imbuement on his lungs, improving its coordination with Combustion. Isabel grows increasingly exhausted and repeatedly disappears from her tent at night, which Noah suspects is secret training. At the edge of Linwick territory, Moxie and Emily separate from the others because Moxie's house is hostile to the Linwicks. They will train for the survival exam and meet the party again in two weeks. Brayden leads Noah, Lee, Todd, Isabel, Allen, and Edward to the walled Linwick city. Noah arrives as a rank-two mage with Sunder, Combustion, and a perfected pyroclastic resonance rune. He intends to confront Vermil and Brayden's father using a controlled-demon cover, secure Vermil's standing, and uncover the unfinished summoning plan. The poisoner, the stronger escaped demon, and Father's exact purpose remain unresolved.

Noah reaches Linwick city as a rank-two mage with Sunder, the Hellreaver's Combustion master rune, and a perfected pyroclastic resonance rune. Lee remains beside him as a willing ally rather than a bound servant. Todd and Isabel have passed their first examination and developed into capable fighters, though Todd's unusual knowledge of body imbuement and Isabel's exhausting secret training remain unexplained. Brayden continues to protect the claim that Vermil could not have killed the Hellreaver and escorts Noah, Lee, Todd, Isabel, Allen, and Edward into Linwick territory. Moxie and Emily separate from the party before the border because of hostility between Moxie's house and the Linwicks; they plan to train and reunite with the others in two weeks. Noah intends to face Vermil and Brayden's father using a controlled-demon explanation for his changed identity. The poisoner, Father's exact plan, the intended outcome of Vermil's summoning, and the possible escape of a stronger demon all remain unresolved.