Chapter Summaries

Gavin introduced Dumbledore to his parents, who gradually accepted that magic was real and agreed to visit Diagon Alley after Christmas to learn more about Hogwarts. The evening ended with Dumbledore joining the family for dinner, while Gavin’s conversation with Cordelia was interrupted by his mother, who then recognized the script on Professor Roscoe’s research papers as Linear A.

• Dumbledore apologized for Hogwarts failing to visit Gavin’s parents, then proved magic was real by repairing a bowl, transfiguring a spoon, and turning Gu Jianguo’s head into a pig’s before changing it back.
• Gu Jianguo questioned Hogwarts’ safety and educational standards, but he and Lin Wanyin agreed to visit Diagon Alley after Christmas to investigate the school and its potions.
• Gavin invited Dumbledore to stay for dinner, and Dumbledore summoned Pipi to help prepare a feast of Chinese and British dishes.
• Gavin spoke with Cordelia through the Two-Way Mirror about her planned ski trip, and Lin Wanyin met Cordelia before teasing Gavin about their closeness.
• Lin Wanyin gave Gavin the research papers Professor Roscoe had brought, then identified the script on a rubbing as Linear A.

Gavin discovered that the Flame Crest Rubbings contained both a decipherable message and a route, using a supercomputer at Oxford to analyze them. The message pointed toward a sacred seat beneath flowing water, while the mapped paths converged on an unexplained blank area that Gavin planned to investigate.

• Lin Wanyin explained her theory that some Linear A symbols represented locations and routes rather than sounds, and Gavin stayed up testing it against the rubbings.
• Gavin and his parents visited Diagon Alley, where Ron thanked Gavin for the seven Galleons that helped him buy a new wand and Lucius Malfoy exchanged insults with Arthur Weasley.
• Gavin returned to Oxford, where Professor Roscoe arranged access to a Cray supercomputer and told Gavin that Hermione Granger had emailed him about entering Oxford at eleven.
• Gavin and Roscoe used two models to analyze the Flame Crest Rubbings, and the results favored a natural-language reading for one section and spatial topology for another.
• The analysis produced a message about stripping away an outer form and finding a holy seat beneath flowing depths, while the mapped routes converged on a blank area that Gavin resolved to investigate.

At Hogwarts, Gavin’s Chinese snacks caused severe allergic reactions in Justin and Cedric after they ate his eight-treasure congee, and he helped stabilize them until Madam Pomfrey treated them. Later, Gavin entered his Inner Landscape and noticed that the white vortex had grown larger.

• Cordelia waited for Gavin’s mother at King’s Cross, then received a scarf and an invitation to visit from her through Gavin.
• Gavin shared Chinese snacks with the Hufflepuffs, and Justin and Cedric ate the eight-treasure congee he had set aside.
• Justin and Cedric suffered severe allergic reactions, and Gavin used Anapneo while Hannah fetched Madam Pomfrey.
• Madam Pomfrey treated Justin and Cedric with Anti-Allergy Potion, while they joked about eating more congee despite their allergies.
• Gavin entered his Inner Landscape and saw that the white vortex had grown noticeably larger.

Gavin discovered that bathing in the Water of Alaya Consciousness had transformed his Manas Consciousness and caused his magic to grow dramatically, which he understood as the dual cultivation of nature and life. Later, he began seeing faint lines that appeared to trace magic, though he had not yet worked out why.

• Gavin ruled out puberty, becoming an Animagus, killing Diadem Tom, and using the Philosopher's Stone as the cause of his rapidly growing magic, and traced it to the Water of Alaya Consciousness.
• Gavin concluded that the water had changed his Manas Consciousness, letting power flow directly from Alaya Consciousness and producing a dual cultivation of nature and life.
• In the Hufflepuff Common Room, Gavin saw faint white threads while Ernie used the Permanent Sticking Charm, but he could not reproduce the effect himself.
• Gavin saw similar lines around a first-year Ravenclaw's Levitation Charm, then accidentally made Cordelia jealous by calling the boy handsome.
• During Charms, Gavin used the lines he saw around spells to predict successful Severing Charms and ducked before Seamus's spell caused an explosion.
• Gavin concluded that the faint lines he occasionally saw seemed to be magic.

Gavin melted the Flame Crest with his Obscurus and absorbed the fire within, gaining a new spell that let him shape fire with magic and emotion. After testing its effects, he tried using it to cook French Fries, but his experiment ended with Poppy preparing fifty pounds of potatoes for him.

• Cordelia admitted she had read her father's diary, and she and Gavin argued before she stomped on his foot and left.
• Gavin used the Obscurus to melt the Flame Crest, releasing a fireball that flew into his chest and left him with the incantation Ignis Ambi-Valens and clues about passion and anger.
• Gavin cast Ignis Ambi-Valens, found that passion produced a large but weak white flame, and discovered that anger created a more destructive blue-green fire that burned through a dragon scale.
• Gavin went to the Hogwarts Kitchens to test the new spell on French Fries, but his Cold Flame left the potatoes limp and soggy.
• Gavin cooked a small batch of French Fries with water, freezing, and hot oil, then discovered that Poppy had cut fifty pounds of potatoes for him.

At breakfast, Gavin shared French fries with Cordelia before observing how her Nimbus 2001 used her magic during flight. His observations led him to question how Ron Weasley’s family car could move on its own, and he began planning an expedition into the Forbidden Forest to find it.

• Ernie tried to classify Gavin’s French fries, while Cordelia tasted them and agreed to let Gavin accompany her to the Quidditch pitch.
• Gavin watched Cordelia practice and saw Runes and magical threads connect her to the Nimbus 2001 as she flew.
• Gavin concluded that a broomstick used its rider’s magic as power, then wondered how a vehicle could move by itself.
• Gavin asked Ron about the Weasley family car and proposed searching for it in the Forbidden Forest with Ron’s help.
• Hermione discussed making a plan, while Cordelia confirmed Gavin might go even if she tried to stop him.
• Gavin proposed sending Ron ahead to see whether the car recognized him, and Ron protested that he would be used as bait.

Gavin organized a search for the Weasley family's missing Ford Anglia, and Hermione’s safety rules led the group to seek Hagrid’s help. They found tire tracks at the edge of the Forbidden Forest, but a swarm of Acromantulas surrounded them before they could investigate further.

• Hermione rewrote Gavin’s plan with strict safety rules, and Harry, Ron, and Cordelia agreed to join the search with Hagrid’s help.
• Hagrid told the group he had heard the car near an old oak grove close to Acromantula territory and warned them that spiders had been restless.
• Cordelia persuaded Hagrid to take the group to the forest’s edge and convinced Ron to come rather than risk Gavin carrying him there later.
• Gavin found tire tracks near an old oak, and Ron recognized them as belonging to the Ford Anglia.
• Hagrid refused to let the group follow the tracks farther into the forest, but a swarm of Acromantulas emerged and surrounded them.

Hagrid and the students were surrounded by Acromantulas in the Forbidden Forest, where Gavin tested powerful blue-green flames and helped the group fight their way toward escape. The enchanted Ford Anglia rescued them, and they emerged from the forest with Hagrid safe and Ron shaken by Gavin’s reckless driving.

• Hagrid tried to reason with Mosag, but she refused to honor Aragog’s promise not to harm Hogwarts students and ordered the spiders to attack.
• Gavin and Cordelia became separated from the others, and Gavin used blue-green flames to kill Acromantulas after discovering that his other fire spells barely harmed them.
• Gavin rejoined Harry, Hermione, Ron, Fang, and Hagrid as the spiders closed in, and the Ford Anglia arrived to rescue them.
• Gavin took control of the Ford Anglia and drove it through the spider swarm and out of the Forbidden Forest while using blue fire to stop their pursuers.
• The group regrouped near Hagrid’s Hut, and Ron compared Gavin’s driving to watching a pig destroy Brussels sprouts.

Gavin studied the Weasley family's Ford Anglia and discovered that music could calm its chaotic magic and change how it drove. When he heard an adult scream in the Forbidden Forest, he raced to the scene and found three Aurors surrounded by Acromantulas.

• Gavin met the Ford Anglia at the edge of the Forbidden Forest and inspected its altered engine, removing a branch from the Whomping Willow that was stuck inside it.
• Gavin struggled to see the car's magical structure until he relaxed, then learned that it absorbed ambient magic and that the Forbidden Forest's chaotic magic made it unstable.
• Gavin studied Mr. Weasley's improvised Runes and found that a Reset Rune could restore the car to factory settings, which would erase its memories.
• Gavin discovered that a Muggle song calmed the car and straightened its magical lines, while different kinds of music changed its mood and performance.
• Gavin heard spells and an adult man's scream in the Forbidden Forest, then raced toward the sounds in the Anglia.
• Gavin found three Aurors surrounded by Acromantulas, drove into the clearing, and told them he had come to help.

Gavin rescued Kingsley Shacklebolt, Tonks, and Dawlish from Acromantulas in the Forbidden Forest, then learned the Aurors were investigating poachers. After returning to Hogwarts, he discovered the school was tense because the Chamber of Secrets might have opened again.

• Gavin used blue fire to kill an Acromantula and make the spiders retreat until Mosag arrived and ordered them to stand down.
• Mosag revealed that her colony feared Gavin because he had killed all forty-one spiders that pursued him before, then led the Acromantulas away.
• Gavin introduced himself to Kingsley Shacklebolt, Tonks, and Dawlish, and drove them out of the forest in Mr. Weasley's sentient Ford Anglia.
• Kingsley explained that the Aurors were investigating the Deepwater Group, a poaching organization targeting creatures in the Forbidden Forest.
• On the drive back, Gavin said Tom Riddle would have made a good professor, alarming the Aurors until he clarified his disdain for Voldemort's terrorist activities.
• Gavin returned to Hogwarts, where Justin told him that the Chamber of Secrets might have opened again.

After students reported seeing contradictory visions of bloody writing around Hogwarts, Gavin and Cordelia investigated and suspected the sightings reflected people’s fears rather than a real Chamber of Secrets attack. Lockhart then claimed to know the culprit, prompting Cordelia to urge Gavin to investigate him.

• Justin and Ernie told Gavin that students had reported bloody writing in several locations, but professors including Dumbledore found no trace of it.
• Harry told Ron and Hermione that Dobby had warned him to leave Hogwarts, and Hermione deduced that a basilisk was in the Chamber of Secrets.
• Harry, Ron, and Hermione tried to inspect the Chamber entrance after curfew, but Professor McGonagall caught them and gave them detention.
• Gavin and Cordelia compared conflicting witness accounts, and Luna Lovegood told them she had heard a disturbing song near a sighting.
• Cordelia concluded that the visions showed what frightened each witness most, while Lockhart announced that he knew the culprit.
• Cordelia urged Gavin to investigate Lockhart, leaving him baffled.

Cordelia used Polyjuice Potion to impersonate Gavin and question Lockhart, while Gavin accompanied her as a seagull. Lockhart revealed that he had invented a second personality to explain the Chamber of Secrets incident, then threatened Cordelia with a Memory Charm, prompting her to stun him; she left Gavin to take the blame.

• Cordelia won a round of rock, paper, scissors against Gavin with help from a costly pendant that suppressed her stray thoughts, and Gavin gave her a hair for the Polyjuice Potion.
• Cordelia transformed into Gavin and entered Lockhart's office with Gavin disguised as a seagull.
• Lockhart traded a fabricated account of his heroics in the Chamber of Secrets for the culprit's identity, but admitted he had no name and was trying to pressure his supposed second personality into appearing.
• Lockhart explained that he believed danger and pressure could awaken a more powerful version of himself, and Cordelia challenged whether that personality existed at all.
• Lockhart reached for his Wand and prepared to use a Memory Charm, but Gavin's seagull form attacked him and Cordelia stunned him.
• Cordelia warned Gavin that Lockhart would remember only that Gavin had attacked him when he woke.

Gavin searched Lockhart’s memories and discovered how Lockhart stole the Homorphus Charm from an Armenian wizard, while Cordelia and Gavin both unexpectedly performed wandless Legilimency under the Polyjuice Potion’s effects. After the potion wore off, they encountered two Ravenclaw students suffering a magical disturbance, and Gavin suspected it was caused by an inaudible kind of Music.

• Gavin entered Lockhart’s memories, learned the Homorphus Charm’s incantation and wand movement, and witnessed Lockhart steal the Armenian wizard’s notes and erase his memory.
• Gavin and Cordelia searched Lockhart’s office, arranged him in an apparently sleeping pose, left him a misleading note, and used Runes to reset his portraits.
• Cordelia discovered that the Polyjuice Potion seemed to strengthen her Legilimency, and Gavin proposed that the potion could affect magic as well as appearance.
• Cordelia refused to let Gavin use her hair for further tests, then changed back when the Polyjuice Potion wore off.
• Gavin and Cordelia found two Ravenclaw boys experiencing a frightening vision and distress; Gavin observed that their magic had become chaotic and increasingly black.
• Gavin recalled Luna’s report of hearing Music and wondered whether an inaudible kind of Music had caused the disturbance.

Gavin built infrasound detectors to track the source of the hallucinations at Hogwarts, and he and his friends followed several signals without finding the culprit. After Gavin used witness patterns to predict where another signal would appear, the group spotted Dobby carrying a Black Wooden Box.

• Cordelia worried when Gavin was missing for three days, but he returned with five infrasound detectors and explained how they worked.
• Gavin assigned his friends detector searches and witness reporting, then the group traced their first signal to a blank wall.
• Over the following week, the group detected five brief signals, and Gavin noticed that almost none of the affected students were from Gryffindor.
• Gavin mapped Harry's movements against the sightings and directed the group to watch the eastern cross-corridor on the fourth floor.
• The group waited in hiding until a small figure appeared with a Black Wooden Box, and Harry recognized Dobby.

Gavin and the students fought Dobby to recover the Black Wooden Box, whose music caused terrifying hallucinations, and Gavin finally stunned the house-elf and dismantled the device. Dobby escaped after implying his master had ordered the scheme, and Professor McGonagall arrived to find the corridor wrecked and Gavin examining the box.

• Dobby tried to escape with the Black Wooden Box, but Gavin and Cordelia trapped it inside an enchanted suit of armor.
• Dobby attacked the group with animated armor and powerful magic, while Harry, Ron, Hermione, Ernie, and Cordelia joined the fight.
• The Music Box’s effects filled the corridor with hallucinations, but Gavin used Muffliato to shield himself and lured Dobby into reaching for the box.
• Gavin opened the armor’s secret release and stunned Dobby as he caught the falling box; Cordelia summoned it, and Gavin dismantled its mechanism.
• Dobby admitted that his master had promised no one would be hurt, then escaped after telling Harry to leave Hogwarts.
• Professor McGonagall arrived and saw the destroyed corridor, the dismantled Music Box, and Gavin among the students.

Professor McGonagall and Dumbledore learned how Gavin and the students stopped Dobby’s enchanted Music Box, while Gavin obtained a hair from Dumbledore after bargaining over his reward and settling an old debt. Lucius Malfoy confronted them, but Harry freed Dobby by tricking Lucius into giving him a sock, and Dobby drove Lucius away.

• Ernie reported that Dobby had used the Music Box to affect students, and Professor McGonagall ordered the six students to write reports and warned Gavin to inform a professor before disappearing.
• Dumbledore examined the Music Box and its parts as Gavin explained how he tracked Dobby; Harry learned that Gavin had used him as bait.
• Gavin persuaded Dumbledore to provide a hair for Polyjuice Potion research after paying 3,590 Galleons toward his Astronomy Tower debt.
• Lucius arrived to demand the Music Box and accuse the students, but Dumbledore challenged his claims and kept the device’s internal components for investigation.
• Harry put a sock inside the empty Music Box casing and returned it to Lucius, who passed it to Dobby; the sock freed Dobby, who protected Harry and knocked Lucius down.

Gavin discovered that Polyjuice Potion could alter how magic flowed through a transformed body, then watched Harry help Gryffindor defeat Hufflepuff in the Quidditch match. His experiments suggested that negative emotions could no longer grow his black Whirlpool, leaving him wondering how Cordelia's Obscurus had become so vast.

• Hagrid explained that Dumbledore had restricted House-elves from crossing Hogwarts's grounds freely, leaving him to inspect every delivery.
• Lockhart took credit for solving the Music Box crisis and assigned students a three-foot essay, prompting Ernie to record Lockhart among those who claimed to have guided events without taking part.
• Gavin used Polyjuice Potion made with Harry's and Seamus's hair and found that their bodies enhanced the Disarming Charm and favored explosive spell release, respectively.
• Harry played Beater for Gryffindor, disrupting Hufflepuff's attacks before catching the faster, distant Golden Snitch and winning the match.
• Gavin tested his black Whirlpool with anger and found that it expanded only temporarily, then returned to its previous size as he wondered how Cordelia's Obscurus had grown so large.

Lockhart held a lavish dinner for his six student assistants and tried to pressure Cordelia into drinking his supposedly harmless Courage Wine. After Snape identified it as a dangerous potion and agreed to help expose Lockhart’s crimes at Friday’s book launch, Gavin prepared to make Lockhart confess in public.

• Lockhart gave Harry, Hermione, Ron, Gavin, Ernie, and Cordelia grandiose animal codenames and invited them to his appreciation dinner.
• At the dinner, Lockhart took credit for the Chamber of Secrets investigation and presented Courage Wine as a harmless way to overcome fear.
• Lockhart pressured Cordelia to drink the unknown potion, but she demanded its formula and independent testing, forcing him to back down.
• Gavin secretly collected a sample of the Courage Wine, and Snape identified it as diluted Draught of Euphoria mixed with Firewhisky and other ingredients that impaired judgment.
• Gavin told Snape that Lockhart had stolen others’ memories and planned to make him confess at Friday’s book launch; Snape agreed to handle the Veritaserum.
• Snape refused to give Gavin a strand of his hair, and Gavin left believing Lockhart would soon reveal his crimes before the school.

At Lockhart’s book launch, Gavin’s question exposed that Lockhart had stolen other wizards’ experiences and used Memory Charms on them. Dumbledore had Lockhart arrested and summoned Ministry investigators, while Gavin quietly signaled Snape across the Great Hall.

• Lockhart presented Hogwarts Crisis and claimed he had planned the investigation, while Ron challenged the book’s cover and Ernie objected to its treatment of his report.
• When Gavin asked Lockhart to teach the Homorphus Charm, Lockhart admitted the spell was not his, and Hermione revealed that its story belonged to an Old Armenian Wizard.
• Under McGonagall’s questioning, Lockhart admitted to using Memory Charms on six people, and Dumbledore ordered him taken to his office and the Ministry notified.
• Lockhart tried to draw his wand, but McGonagall, Flitwick, Sprout, and Snape aimed their wands at him, and he surrendered before following McGonagall from the hall.
• After Lockhart left, Gavin suggested Ron keep the book as a souvenir, then silently raised his Pumpkin Juice toward Snape, who pushed Lockhart’s goblet away and gave a slight smile.

Gavin comforted Cordelia after she cried over The Remains of the Day, then watched her lose a close Quidditch match to Cho Chang. Cordelia left the match resolving to have no regrets, while a hidden figure prepared to bring an unnamed girl “home” once Dumbledore left Hogwarts.

• Gavin tried to comfort Cordelia by describing increasingly grim tragedies, and she stopped crying and began eating her breakfast.
• At the Slytherin-versus-Ravenclaw match, Cho marked Cordelia closely and used an elaborate search pattern to find the Golden Snitches.
• Cho tricked Cordelia into chasing a false lead, but Cordelia later caught a Snitch and scored twenty points for Slytherin.
• Cho caught the final Snitch, giving Ravenclaw a 290–90 victory over Slytherin.
• Gavin encouraged Cordelia to keep trying so she would have no regrets, and she agreed.
• In a windowless room, a hidden speaker told an accomplice to wait until Dumbledore left Hogwarts before bringing a girl “home.”