Chapter Summaries

Vizet and Luna used the Water and Fire Resistance Spell to reach Hogwarts’s Halloween Feast, while Harry, Ron, and Hermione attended Nearly Headless Nick’s gloomy five-hundredth Deathday Party. The chapter left Vizet and Luna enjoying the lively feast as they caught sweets from the enchanted ceiling.

• Luna and Vizet made their way down the Moving Staircase and used the Water and Fire Resistance Spell to keep rain off their clothes and shoes.
• Vizet and Luna met Harry, Ron, and Hermione on their way to Nearly Headless Nick’s Deathday Party, and Vizet explained the practical spell.
• Anthony joined Vizet and Luna and told them that Dumbledore had arranged performances, including the Skeleton Dance Troupe.
• Nearly Headless Nick welcomed Harry, Ron, and Hermione to his cold, eerie party, where Ron found chicken legs covered in maggots.
• Vizet and Luna reached the decorated Great Hall, caught sweets falling from the ceiling, and shared nougat and Fizzing Whizbees.

The Halloween Feast featured the Skeleton Dance Troupe’s magical performance, which inspired Vizet to note the precision and practice behind it. Dumbledore then began the feast and announced that he had prepared holiday gifts, leaving the students beneath a shower of candy.

• The Skeleton Dance Troupe performed with levitated, transfigured skeletons before revealing themselves as a group of white-haired Wizards, and Vizet wrote down what he learned from their magic.
• Flitwick praised precise control, McGonagall said Vizet suited Ravenclaw, and Lockhart mistakenly thought they were talking about him.
• Dumbledore opened the Halloween Feast, where students ate festive foods and watched him and Snape try Coolick.
• Fred and George said they expected to sell Coolick after the Ministry finished evaluating the potion the following week.
• Dumbledore announced that he had prepared holiday gifts, then turned the remaining candy candles into firelight as colorful candies rained over the students.

Vizet heard a cold, malicious voice in the corridor that reminded him of something familiar, but the Marauder's Map showed no one in that direction. He reported the voice to Professor Flitwick as Penelope, Percy, and the other prefects hurried back to the Great Hall.

• Headmaster Dumbledore let Colin Krivey take a photograph of him, then even operated Colin's camera himself.
• Fred and George told Vizet and Luna that Arthur Weasley had confiscated a Muggle book about borrowed momentum marketing because it had been tampered with using Belladonna potion powder.
• Vizet heard a faint voice craving blood and flesh, but found no name in that direction on the Marauder's Map.
• Vizet reviewed his memory to confirm that he had heard the voice, then hurried to tell the professors.
• Vizet told Professor Flitwick where the voice had come from, and Penelope, Percy, and the other prefects returned to the Great Hall.

After Mrs. Norris was found apparently petrified and a warning about the Chamber of Secrets appeared on the wall, Vizet considered the danger posed by Salazar Slytherin’s long-lived pet. Dumbledore led Harry and the others away with Filch, while Vizet remained with the Ravenclaws.

• Percy and Penelope told the professors that something had happened near the Great Hall, and Dumbledore sent Filius Flitwick and Snape to investigate.
• Vizet joined the Ravenclaws and used a Night Vision Charm to read the wall’s warning that the Chamber of Secrets had been opened and the Heir’s enemies should beware.
• Vizet and the Ravenclaws discussed Salazar Slytherin’s falling-out with the other founders and the legend that the Chamber held a creature meant to attack Muggle-born wizards.
• Vizet recalled that Salazar Slytherin’s pet was still alive and reasoned that Ancient Magic Power might have sustained it; Luna promised to stay with him.
• Dumbledore carried the stiff, unresponsive Mrs. Norris while Filch accused the students of killing her, and Lockhart guided Harry and the others along the corridor.

Dumbledore determined that Mrs. Norris had been petrified and ruled out Harry and his friends as capable of casting the powerful Dark Magic. Snape continued to cast suspicion on Harry, but McGonagall defended the students, and Dumbledore sent them back to rest while explaining that a mandrake potion could restore Mrs. Norris.

• Lockhart claimed he knew how to reverse the magic affecting Mrs. Norris, but Filch learned she could not be saved by him and continued to grieve.
• Snape and Flitwick reported finding no traces of magic, and Dumbledore revealed that Mrs. Norris was petrified rather than dead.
• Snape questioned Harry about his whereabouts and suggested he was hiding something, while Harry, Ron, and Hermione said they had attended the Deathday Party.
• McGonagall challenged Snape's suspicions, and Dumbledore let Harry and his friends return to rest after they denied seeing anything unusual.
• Dumbledore told Filch that mandrakes could be used to brew a potion to reverse the petrification, and Snape mocked Lockhart's offer to help.

After the professors discussed the failed search for clues about the Chamber of Secrets, Dumbledore sent Vizet a Phoenix Patronus inviting him to the Hospital Wing the next day. The students traded rumors about the Chamber, while Vizet learned that those stories had spread alongside Pure-blood supremacy.

• Snape mocked Lockhart's potion mishap, and Harry and the others hurried out of Lockhart's office.
• McGonagall took Mrs. Norris to Madam Pomfrey, while Sprout returned to care for the Mandrakes.
• Flitwick and Snape told Dumbledore they had found no sounds, magic, or Dark Magic connected to the incident, and they discussed asking Vizet about his Animagus abilities.
• Dumbledore asked Flitwick about Vizet's progress with the Weather Charm, then sent a small Phoenix Patronus toward Vizet.
• Ravenclaw and Gryffindor students exchanged books and rumors about the Chamber, and Vizet traced the stories' spread to the rise of Pure-blood supremacy after 1698.
• Vizet found Dumbledore's Phoenix Patronus on his pillow, inviting him to the Hospital Wing after his midday break and telling him to rest.

Vizet helped Filch find a way to support Mrs. Norris and examined the Dark Magic on the wall before leaving for class. Later, he met The Grey Lady and hoped she might know something about the Chamber of Secrets.

• Vizet found Ravenclaw students discussing the Chamber of Secrets and learned that Mrs. Norris lay stiff and statue-like in the Hospital Wing.
• Vizet rescued Colin Krivey from slipping in the corridor and persuaded Filch to visit Mrs. Norris and comfort her.
• Vizet sensed malice and Dark Magic clinging to the writing on the wall and considered ways to remove it.
• Professor McGonagall told Vizet and Luna to leave for class, then noted that Filch's visit would make things easier for the students.
• Vizet encountered The Grey Lady on his way to the Hospital Wing and greeted her, and she recognized him for helping Ravenclaw win the House Cup.

Vizet learned from The Grey Lady that a Ravenclaw named Myrtle Warren had died in a Chamber of Secrets attack fifty years earlier, and that Rowena Ravenclaw might have left a hidden chamber. At the Hospital Wing, Vizet examined the magic that petrified Mrs. Norris and discovered it carried deadly killing intent that drained a salmon’s life.

• Vizet asked The Grey Lady about the Chamber of Secrets, and she revealed that Myrtle Warren had died in a similar attack fifty years earlier.
• The Grey Lady told Vizet that Myrtle Warren haunted the second-floor Girls' Bathroom and hinted that fools or thinkers could find a chamber left by Rowena Ravenclaw.
• Vizet went to the Hospital Wing, where Dumbledore, Filch, and Madam Pomfrey were caring for Mrs. Norris.
• Vizet sensed unusual Dark Magic and malice on Mrs. Norris, then used a cleansing spell to reveal a deep Black Mist with dark green lightning.
• Dumbledore recognized the Black Mist as blatant killing intent, and Vizet cast it onto a salmon, which died as its Life Force drained away.

Vizet and Dumbledore discussed Mrs. Norris’s curse and the renewed Chamber of Secrets attacks, uncovering how Voldemort had framed Hagrid fifty years earlier. Vizet shared a memory of the latest incident with Dumbledore, who began viewing it for clues.

• Vizet explained that removing the killing intent had helped Mrs. Norris but that the Mandrake Restorative Draught was likely needed for her full recovery.
• Vizet told Dumbledore that the Chamber of Secrets existed and that the Grey Lady had said a Ravenclaw died when it was opened fifty years earlier.
• Dumbledore revealed that Voldemort had opened the Chamber fifty years ago and framed Hagrid, whose arrest coincided with the attacks stopping.
• Dumbledore said Myrtle Warren had recalled hearing someone speak and seeing enormous yellow eyes, but Filius and Severus had found no unusual sounds or magical traces during the latest search.
• Vizet extracted a memory of the recent incident, and Dumbledore took it into his own mind to examine it.

Vizet and Dumbledore investigated the voice in the memory and considered whether a giant serpent had attacked Mrs. Norris. Vizet connected the attack to Parseltongue, and Dumbledore tested whether Vizet could understand snakes.

• Dumbledore sensed coldness and malice in Vizet's memory but found no further clues.
• Vizet recalled a giant serpent from his memories and suggested it had petrified Mrs. Norris, while Dumbledore wondered how it could move through Hogwarts unseen.
• Vizet remembered murals about separating an Obscurus and identified Parseltongue as a magical talent associated with Salazar Slytherin and Herpo the Foul.
• Vizet asked why he could understand Parseltongue despite not noticing the talent when he encountered the Runespoor, and Dumbledore said they could test it.
• Dumbledore summoned an Ashwinder, and Vizet heard it demand to be released so it could lay its eggs.

Vizet used Parseltongue to calm an Ashwinder and planned to use his talent to lure out the Heir’s snake. After rumors spread that Harry might be the Heir, Vizet brought Dumbledore a Parseltongue Magical Artifact that could warn them of the Giant Serpent’s movements.

• Vizet calmed the Ashwinder with Parseltongue and told Dumbledore he wanted to experiment and lure the snake out of its hole.
• Madam Pomfrey reminded Vizet and Dumbledore that classes were starting, and Dumbledore agreed to help Vizet plan when he was ready.
• Hermione’s questions in History of Magic intensified discussion of the Chamber of Secrets, while a rumor spread that Harry was the Heir and would become a second Voldemort.
• As the weekend arrived without further attacks, Vizet finished a glowing Magical Artifact designed to warn of the Giant Serpent’s movements and showed it to Dumbledore.

Vizet presented Dumbledore with his Amethyst Magical Artifact, which used a Mandrake leaf inscribed with Parseltongue to detect snakes and trigger an alarm. Dumbledore helped him improve its design and concealment, and Vizet proposed ways to identify snakes and link multiple artifacts.

• Vizet explained how he created the Amethyst Magical Artifact with help from Luna, Fred, and George, using a Mandrake leaf and inscribed Parseltongue to sense nearby snakes.
• Vizet demonstrated the artifact’s Wand-Lighting Charm and Screaming Charm, and Dumbledore praised its function while suggesting improvements to its appearance, snake identification, and warning method.
• Dumbledore revised Vizet’s notes, recommending concealment magic, Demiguise hair, and zircon, while answering Vizet’s questions about Alchemy and Magical Artifact-making.
• Vizet proposed using a Mandrake leaf to anchor the Giant Serpent’s voice as a way to identify snakes.
• When Dumbledore asked how to connect the artifacts, Vizet suggested separating part of the Obscurus using the method shown in the murals, surprising Dumbledore.

Vizet explained to Dumbledore how ancient African ritual magic could separate an Obscurus and described his own method of preserving its connection through emotion and the Counter-Curse to Obliviation. Dumbledore then asked whether Vizet could help several friends recover memories lost to the Obliviation Charm.

• Dumbledore asked Vizet what the African mural copies revealed about Obscuruses, and Vizet explained that Mandrake-assisted ritual magic could strip away an Obscurial's hatred but might also remove their magical ability.
• Vizet described a second method that used love to help an Obscurial break free, and credited his own progress to Dumbledore, the professors, and Snape's lessons in the Patronus Charm.
• Vizet conjured a small Patronus and showed Dumbledore how it resonated with his peaceful Obscurus.
• Vizet explained that he used the Counter-Curse to Obliviation as a fulcrum, linking an emotion to the Obscurus so it could remain connected without being fully separated, then placed a wisp of black mist inside an Amethyst.
• Dumbledore asked whether Vizet could help friends recover memories they had lost, and Vizet asked if the Obliviation Charm had caused their amnesia.

Vizet completed the Parseltongue Whistle and warned Dumbledore that a beast might have attacked Hagrid’s chickens. As the Quidditch match between Gryffindor and Slytherin began, Vizet noticed a Bludger repeatedly targeting Harry Potter.

• Vizet and Dumbledore agreed to prepare Parseltongue Whistles to help guard the castle against the Giant Serpent.
• Vizet named the artifact the Parseltongue Whistle, and Fred and George began making its bases with funding from Dumbledore.
• Vizet told Dumbledore that Hagrid’s chicken coop had been attacked and received a bookmark for reporting anything unusual.
• The students gathered for the first Quidditch match of the season, where Slytherin’s Nimbus 2001 brooms quickly helped the team score.
• Vizet spotted a Bludger that ignored the Chasers and repeatedly attacked Gryffindor Seeker Harry Potter, even after Fred and George knocked it away.

During a Quidditch match, Vizet traced the magic controlling the Bludger to a House-elf beneath the stands and informed Dumbledore. Dumbledore identified the elf as an outsider acting under orders, while the match continued and Vizet considered how to stop him.

• Fred and George knocked the Bludger toward Draco, but it abruptly turned back and resumed attacking Harry.
• Vizet used the Marauder's Map and Ancient Magic Power to trace the spell attached to the Bludger, while Luna protected them from the rain.
• When the rain forced a timeout, Vizet located the spell's source beneath the western stands and sent Dumbledore the information on a bookmark.
• Dumbledore replied that he would send a House-elf to investigate, and Vizet used a Night Vision Charm to help Luna watch the match.
• After the match resumed, the Bludger kept pursuing Harry, and Gryffindor scored a goal despite the disruption.
• Dumbledore reported that the spellcaster was a House-elf from outside Hogwarts who was acting under orders and would not leave, so Vizet began considering a solution.

Vizet and Luna captured Dobby after stopping him from interfering with Harry's Quidditch match, and Dobby fainted when he heard Dumbledore. Vizet brought him to the Headmaster's Office, where Snape proposed using Veritaserum on Dobby and Harry.

• Vizet and Luna dropped beneath the Eastern Viewing Platform and used the Levitation Charm to land safely while waiting for Dobby.
• Dobby appeared and tried to use magic near the Quidditch Pitch, so Luna restrained him with the Levitation Charm and Vizet trapped him inside an Improved Extinguishing Charm.
• Vizet bound Dobby with Devil's Snare and questioned him about attacking Harry and releasing the Giant Serpent; Dobby denied attacking Harry and fainted when he heard Dumbledore.
• Dumbledore took charge of Dobby, and Vizet suggested asking Harry about their connection.
• Vizet returned Luna to the Common Room and took Dobby to the Headmaster's Office, where Snape showed him Veritaserum and proposed giving it to Dobby and Harry.

Harry learned that Dobby had sabotaged him to keep him away from Hogwarts, where the Chamber of Secrets had been opened. Vizet restrained the house-elf and proposed extracting his memories while Dumbledore considered how to question him.

• Harry confronted Snape, who mocked his injured arm and deducted points from Gryffindor for disrespect.
• Dobby warned Harry that he was in danger and said he had tried to keep him from returning to Hogwarts because the Chamber of Secrets had been opened.
• Dumbledore arrived, and Harry realized Dobby had caused his Ministry warning and missed train; Snape recognized Dobby as Lucius's house-elf and went to fetch Draco.
• Dobby refused to explain further and repeatedly hurt himself, so Vizet bound him until he fainted.
• Vizet discussed using Veritaserum with Dumbledore, then suggested extracting Dobby's memories to learn what he knew about the Chamber.

Vizet extracted a memory from Dobby by using his fear of Voldemort as a focus, while Snape questioned Draco about his father’s instructions. As Dobby awakened and the group prepared to examine the memory, Vizet sensed that the Giant Serpent had appeared.

• Snape questioned Draco about his father’s instructions, and Draco said he had been told to build a relationship with Vizet only inside Hogwarts.
• Vizet used Dobby’s fear of Voldemort to organize his chaotic memories and extracted one with the Memory Extraction Charm.
• Draco arrived with Snape and demanded to know why Dobby was at the school; Dobby tried to punish himself, but Dumbledore stopped him.
• Snape suggested Veritaserum, and Dumbledore proposed examining the memory Vizet had extracted.
• Vizet suddenly announced that the Giant Serpent had appeared.

Colin Creevey went to check on Harry after curfew and encountered the Giant Serpent, but a House-elf brought him safely to Dumbledore’s office. Colin had taken a Polaroid picture of the creature, and Dumbledore opened the camera to find it smoking and burned.

• Colin Creevey left the Gryffindor Common Room after curfew and wandered onto the Fourth Floor, where the Giant Serpent seized him.
• Colin pressed the shutter on his Polaroid as the creature attacked, and Vizet spotted Colin’s name on the Marauder’s Map.
• Vizet alerted Dumbledore, who sent a House-elf to rescue Colin and bring him to the Headmaster’s Office.
• Snape silenced Colin’s scream, and Dumbledore reassured him while Snape took fifty points from Gryffindor for breaking curfew.
• Colin told Vizet that he had taken a picture of the Giant Serpent, and Dumbledore had a House-elf retrieve the Polaroid.
• Dumbledore opened the Polaroid and found burning plastic and black smoke inside.

After Colin was rescued from the Giant Serpent, Vizet deduced that it traveled through Hogwarts’s pipes and noticed Spiders fleeing the castle. He, Dumbledore, and Snape investigated the sites of the attacks and found signs of potion brewing in the abandoned bathroom, where Dumbledore opened a stall.

• Dumbledore failed to repair Colin’s smoking Polaroid, and Snape said Vizet had saved Colin from being attacked.
• Vizet explained that the Giant Serpent could be moving through Hogwarts’s pipes, and Harry sensed that the clue meant something.
• Professor McGonagall met the group near Gryffindor Tower, and Snape confirmed he had deducted fifty points from Gryffindor.
• Madam Pomfrey made Harry drink Skele-Gro while Vizet, Dumbledore, and Snape examined the attack sites.
• Vizet noticed Spiders fleeing the castle and suggested they investigate where Mrs. Norris had been attacked.
• The group found signs that someone had brewed a potion in the abandoned bathroom, and Dumbledore opened a stall.