Recaps

Isaac learned that Harry and his friends believed Snape was after the Sorcerer's Stone, despite Quirrell's death, and challenged their suspicion. The chapter left Hermione reeling from Isaac's wordplay while Ron remained confused.

• Justin Finch-Fletchley guessed that Hufflepuff's fifty House Points came from the fourth-floor challenge, and Isaac confirmed that he, Cedric, and Gabriel had explored it.
• Professor Sprout praised Isaac and reflected that his success might bring extraordinary changes to Hufflepuff.
• Ernie Macmillan and Justin Finch-Fletchley left Isaac to eat with Harry, Ron, and Hermione after class.
• Harry took Isaac to his dormitory and told him that Snape was after the Sorcerer's Stone.
• Isaac questioned Harry and Hermione's suspicion and tricked Hermione into recognizing the implication of her answer about Snape's race.

Harry told Isaac that he suspected Snape was after the Sorcerer's Stone, but Isaac dismissed the accusation without explaining why. Isaac left Harry to keep worrying about Snape, whose imagined villainy would push Harry to improve.

• Harry raised the alarm that Snape was planning to go after the Sorcerer's Stone.
• Isaac questioned whether Harry and the others had really heard Snape say that, then considered why Snape might want the Stone.
• Harry described what he had seen and explained why he believed Snape was guilty.
• Isaac told Harry that Professor Snape was not that kind of person but gave no explanation.
• Isaac left the Hufflepuff common room for lunch, while Harry remained troubled and more worried than before.

Harry, Ron, and Hermione planned to investigate the fourth-floor chamber and gather evidence against Snape, while Isaac remained convinced Snape would not steal the Sorcerer's Stone. Ernie and Justin asked Isaac to take them into the dangerous chamber so they could help Hufflepuff, and he questioned whether they were ready to face the Three-Headed Dog.

• Harry said they could not let Snape steal the Sorcerer's Stone, and Ron asked what they should do since Isaac did not believe Snape was guilty.
• Hermione suggested reaching the Sorcerer's Stone first and finding evidence as they faced the challenges, and the three agreed to investigate the fourth-floor chamber that night.
• Isaac joined Ernie and Justin for lunch and told them he had cleared up a misunderstanding with Harry, though Harry remained unconvinced.
• Ernie asked Isaac to take him and Justin to the fourth-floor chamber next time, and Isaac warned them about its dangers and Gabriel Truman's encounters with the Three-Headed Dog.

Isaac agreed to guide Ernie and Justin and planned to take them on their first midnight excursion into the secret chamber. At Hogwarts bedtime, they joined five older Hufflepuffs who had gathered to form an eight-person expedition, though Justin worried the group would attract attention.

• Justin and Ernie told Isaac they were ready and unafraid, and he welcomed them as followers who wanted his guidance.
• Isaac told Ernie and Justin to rest before their first midnight excursion to the secret chamber.
• Isaac brought Ernie and Justin to the common room, where Gabriel, Cedric, and three other older students were waiting.
• Cedric introduced the older students, and Gabriel urged the group to hurry so Gryffindor would not reach the secret chamber first.
• Justin questioned whether an eight-person group would draw too much attention as they prepared to leave.

Isaac led a group of Hufflepuffs out after curfew to visit the Chamber of Secrets, helping Ernie and Justin learn the spells they needed to sneak past Filch. Inside, the students saw the sleeping Three-Headed Dog and heard a seventh-year question Gabriel’s claim that he had led it around all night.

• Cedric and the older Hufflepuffs prepared for the outing with Disillusionment Charms and other stealth spells.
• Isaac cast nonverbal spells on Ernie and Justin, giving them the same after-curfew protections.
• Gabriel led the group toward the fourth floor, and they avoided Filch while making their way to the chamber.
• Isaac opened the chamber and put the Three-Headed Dog to sleep before the Hufflepuffs entered.
• The students stared at the enormous sleeping dog, and a seventh-year challenged Gabriel’s story about leading it around for most of the night.

Isaac helped Gabriel preserve his reputation after the Three-Headed Dog chased him, then organized the group’s next steps. The three older Hufflepuffs stayed behind to teach the younger students and practice spells on the sleeping beast while Isaac, Cedric, and Gabriel prepared to continue onward.

• Isaac explained that he and Cedric had helped Gabriel evade the Three-Headed Dog, and the older students praised Gabriel for walking it.
• Ernie noticed Isaac’s kindness and decided he was a leader worth following.
• Isaac asked the three older students whether they would continue to the next stage or stay behind, and all three chose to stay.
• Barnaby Hawthorne, Jason Bunting, and Walter Prendergast explained that they wanted to watch over the younger students and test their abilities against the Three-Headed Dog.
• Isaac suggested that the older students practice the Reviving Charm and Stunning Spell on the beast, and they agreed to give the first-years a lesson before beginning.

Cedric and Gabriel discovered deadly magical plants beneath the Trapdoor, but Isaac wanted to collect the valuable herbs Professor Sprout had placed there. He showed them his Undetectable Extension Charm pouch, and Cedric began to question whether it was safe to use it on the plants.

• Isaac used Lumos to reveal Venomous Tentacula, alligator pears, and Fanged Geranium below the Trapdoor.
• Cedric and Gabriel grabbed Isaac's legs to stop him from jumping into the passage.
• Isaac pointed out the valuable herbs among the dangerous plants and said he could deal with them.
• Isaac produced his Undetectable Extension Charm pouch, which Cedric recognized as his Ministry of Magic award.
• Cedric loosened his grip but asked whether putting the dangerous plants into the pouch was safe.

Isaac, Cedric, and Gabriel cleared the magical plants from an underground chamber and found Professor Flitwick’s challenge of thousands of flying keys. Meanwhile, Harry, Ron, and Hermione arrived outside the Chamber of Secrets to begin clearing the challenges.

• Isaac collected nearly all the valuable magical plants while Cedric and Gabriel watched, then covered the cleared ground with Devil's Snare and magically grew it.
• Isaac, Cedric, and Gabriel found a handleless black door and Cedric opened it with Alohomora.
• The trio entered a large room filled with flying keys and learned they had to find the one that opened the far door.
• Cedric and Isaac tried several Unlocking Spells on the far door, but Professor Flitwick's restrictions stopped them.
• Harry arrived outside the Chamber of Secrets with Ron and Hermione and urged them to open the door.

Harry’s Unlocking Spells failed to open the door, while Isaac, Gabriel, and Cedric discovered that Professor Flitwick’s flying keys copied spells cast at them. They realized careless magic would trigger a cascading barrage of attacks, and Isaac was left to propose a solution.

• Harry and the others repeatedly cast Alohomora at the door, but their spells vanished without effect.
• Gabriel bound a flying key with Incarcerous, and the key disappeared after hitting the floor.
• A hidden key copied the spell and bound Gabriel with pale golden ropes until Isaac dispelled them.
• Cedric cast Incendio on two stray keys, and Isaac extinguished the two streams of copied fire that shot back at them.
• Cedric and Gabriel realized affected keys copied spells and could trigger a cascading barrage, then asked Isaac for a way forward.
• Isaac said he had two ideas.

Isaac, Cedric, and Gabriel trained by shooting down the flying keys in Professor Flitwick’s challenge, until the keys sped up and Isaac pushed himself to test the stage’s limits. Cedric and Gabriel watched in shock as Isaac cast spells at an astonishing rate.

• Isaac proposed clearing the flying keys with single-target spells, and Cedric and Gabriel rejected his riskier plan to destroy them all at once.
• The three began practicing accuracy and defensive counterattacks while shooting down keys and deflecting their spells.
• As the keys disappeared, Gabriel noticed that the remaining ones had sped up, and Isaac and Cedric confirmed the change.
• Isaac accelerated his casting and knocked aside nearly every spell the keys fired back at him.
• Cedric and Gabriel watched in awe as Isaac kept casting like a tireless spell turret.

Isaac’s rapid Nonverbal Spellcasting inspired Cedric and Gabriel to practice faster casting against the Flying Keys. Meanwhile, Harry, Ron, and Hermione exhausted themselves trying to open the Chamber of Secrets, and they ended the night wondering whether younger students needed more than three people to unlock its door.

• Isaac demonstrated rapid Nonverbal Spellcasting, and Cedric and Gabriel tried to improve their own casting speed by attacking the Flying Keys.
• Harry pushed Ron and Hermione to keep practicing the Unlocking Spell on the Chamber of Secrets door.
• Ron suggested the three of them might not be enough because they were younger than the students who had previously explored the Chamber.
• Hermione agreed that the door might require more than three younger students, and Harry accepted her reasoning.

Harry, Ron, and Hermione agreed to return the next night with more help, while Isaac, Cedric, and Gabriel faced the later stages of the spell trial. Isaac used prophecy and a Multi-Freezing Charm to clear the key challenge, earning praise and fifty points from Professor Flitwick before being sent to the next trial.

• Ron urged Harry and Hermione to return the next night with three more people, and Harry agreed after realizing it was wrong to drag people from bed.
• Isaac, Cedric, and Gabriel reached the fifth stage, where Isaac alone could hit the keys by using prophecy to anticipate their movements.
• As the trial advanced, Isaac faced the sixth and seventh stages while Cedric and Gabriel could no longer keep up with the keys.
• Isaac foresaw where five keys would fly and cast a Multi-Freezing Charm that slowed and destroyed them.
• Professor Flitwick appeared, praised their spellwork, awarded them fifty points, and told them to hurry to the next trial.

Isaac, Cedric, and Gabriel realized they had skipped Professor Sprout’s Herbology challenge without earning points, and Isaac chose not to claim its reward to avoid suspicion over the herbs they had taken. They entered the next challenge and discovered a giant chessboard, where Isaac used Transfiguration to turn a stone into armor and send it onto the board.

• Cedric noticed that the group had received no points for Professor Sprout’s challenge, and Isaac explained that they had cleared it unconventionally by overpowering the plants.
• Isaac refused to seek the Herbology reward, arguing that claiming points would draw attention to the herbs they had taken and that another House should get the opportunity.
• Gabriel opened the next door, and the group entered a dark room that revealed a giant chessboard with towering white pieces.
• Isaac identified the room as Professor McGonagall’s Transfiguration challenge, transformed a large stone into a suit of armor, and sent it across the board toward the exit.

Isaac, Cedric, and Gabriel tested Professor McGonagall’s enchanted chessboard and found its pieces could tear apart an armored knight, so they postponed the trial. After they passed through the Devil’s Snare, they discovered Hawthorne driving Ernie and Justin through a frantic task while the Three-Headed Dog chased them.

• Isaac sent a Transfigured armored knight against the white chess pieces, which destroyed it when it tried to cross between them.
• Isaac concluded they would have to play chess or break the board, and he, Cedric, and Gabriel decided to return to the trial later.
• Isaac and the others used Incendio to clear the Devil’s Snare, made a ladder with Transfiguration, and climbed through the trapdoor.
• They found the Three-Headed Dog chasing Ernie and Justin while Hawthorne shouted at them to work faster and wielded a whip.
• Isaac spotted Jason and Walter hiding in a corner, breathing heavily as if they were dead.

Hawthorne pushed Ernie and Justin through an exhausting training session with Fluffy, then revealed how he controlled the Three-Headed Dog with food and a whip. Isaac suggested Hawthorne start a club to teach other students, and Hawthorne considered it with evident enthusiasm for the pressure involved.

• Hawthorne made Ernie and Justin run from Fluffy while they used spells to slow the dog, until both collapsed from exhaustion.
• Hawthorne stopped Fluffy and rewarded it with a bucket of fresh entrails, then had Isaac clean his hands with a Cleaning Charm.
• Fluffy went to sleep by the trapdoor, and Hawthorne explained that he had not tamed it but had learned how to make it cooperate using food and a whip.
• Isaac suggested Hawthorne start a club to help students improve, and Hawthorne considered teaching them with his high-pressure methods.

Isaac asked Hawthorne about his plans after graduation and considered whether he could steer the talented student toward working with him. Hawthorne planned to seek an internship at the Department for the Regulation and Control of Magical Creatures, and Cedric confirmed that his qualifications met its recent standards.

• Isaac asked Hawthorne what he planned to do after graduation and considered recruiting him in the future.
• Hawthorne said he would probably apply for an internship at the Department for the Regulation and Control of Magical Creatures.
• Isaac asked Cedric whether Hawthorne’s grades would qualify him for the department.
• Hawthorne listed his O.W.L. and N.E.W.T. certificates, and Cedric confirmed he met the internship requirements and could likely secure a permanent position afterward.

Isaac warned Hawthorne that his prospects as a Muggle-born Ministry employee were bleak and suggested staying at Hogwarts instead. With no teaching vacancies available, Hawthorne learned that an assistant gamekeeper role might be possible, tied to Hagrid and his tamed Three-Headed Dog.

• Isaac asked Cedric about Hawthorne's career prospects at the Ministry, and Cedric struggled to explain the barriers facing Muggle-borns and half-bloods.
• Isaac told Hawthorne that getting hired by the Ministry would probably be the height of his career, leaving Hawthorne dismayed.
• Isaac suggested Hawthorne stay at Hogwarts, but Hawthorne said there were no teaching vacancies besides the Defense Against the Dark Arts post, for which he lacked experience.
• Isaac proposed an assistant gamekeeper position, and Gabriel revealed that Hagrid had tamed a Three-Headed Dog.
• Isaac told Hawthorne that his future would likely depend on Hagrid and the Three-Headed Dog.

Isaac explained why Hagrid had been expelled from Hogwarts and argued that Hawthorne should document Hagrid’s taming of the Three-Headed Dog. Hawthorne was inspired by Isaac’s promise that the work could launch his career in magical creatures.

• Isaac explained that Tom Riddle had framed Hagrid for the Chamber of Secrets murder, though Hagrid had been expelled mainly for secretly keeping the dangerous Acromantula Aragog.
• Isaac noted that Hagrid had left Hogwarts as a third-year student and was poorly suited to writing or presenting his achievements to the Ministry of Magic.
• Isaac said Hagrid would struggle to get the wizarding world to recognize that he had tamed a Three-Headed Dog without expert witnesses or a convincing written account.
• Isaac urged Hawthorne to stay with Hagrid, turn the taming process into an academic paper, and document methods for controlling the creature.
• Isaac promised that the work could make Hawthorne a rising expert, opening opportunities at Hogwarts or a senior position at the Ministry of Magic.
• Hawthorne listened with shining eyes and appeared deeply tempted by Isaac’s career plan.

Hawthorne hesitated over Isaac's offer and decided to seek Professor Sprout's advice before choosing his future. Meanwhile, Harry overcame his doubts about the Chamber of Secrets, recruited Ron and Neville to join him, and led them to its door.

• Hawthorne told Isaac he needed time to think over the decision, and Isaac agreed that he should be cautious.
• Isaac led the exhausted Hufflepuffs back to their dormitory after they secretly disguised themselves and left the Chamber of Secrets.
• Harry, unable to sleep, slapped himself and decided to visit the Chamber of Secrets again.
• Ron woke and volunteered to go with Harry, and Neville joined them after Ron said opening the door could earn Gryffindor points.
• Harry led Ron and Neville to the fourth-floor Chamber of Secrets and asked if they were ready to cast the Unlocking Spell together.

Harry, Ron, and Neville opened the Chamber of Secrets door and found Fluffy waiting beyond it. Harry used Transfiguration to make a music box and put Fluffy to sleep, leaving the three friends standing before the sleeping dog.

• Harry, Ron, and Neville cast Alohomora together and opened the Chamber of Secrets door.
• The three entered and found Fluffy, then fled as the Three-Headed Dog chased them.
• Harry realized Fluffy could be subdued with music, while Neville and Ron tried to keep the dog occupied.
• Harry Transfigured a pile of junk into a music box and wound it until it played.
• Fluffy grew sleepy, moved his bed, and collapsed; Harry called Ron and Neville over to keep the music box playing.

Harry, Ron, and Neville found Hagrid's letter on Fluffy and received forty points before entering the trapdoor challenge. They survived a mature Devil's Snare, and Neville spotted what might have been a Chinese Chomping Cabbage behind the vines.

• Harry found Hagrid's letter on Fluffy and watched Hagrid award them forty points.
• Harry, Ron, and Neville opened the trapdoor and fell into a mature Devil's Snare that began strangling them.
• Neville told Harry to use fire, and Harry cast Incendio to free himself, Ron, and Neville.
• Ron lit the room with Lumos, revealing Devil's Snare covering its walls, ceiling, and floor.
• Ron stopped Harry from setting the vines on fire, and Neville said he had seen a shape resembling a Chinese Chomping Cabbage behind them.

Neville explained the weaknesses and value of Chinese Chomping Cabbage before helping Harry and Ron uncover one with flames. He retrieved a fifty-house-point envelope from its flowerpot, and Professor Sprout appeared as he opened it.

• Neville told Harry and Ron that Chinese Chomping Cabbage feared fire but was valuable as an ingredient in Skele-Gro.
• Harry used burning Devil's Snare vines to drive the plant away from the hidden spot, revealing a lone Chomping Cabbage.
• Neville spotted an envelope in the flowerpot and carefully retrieved it while Harry and Ron kept the plant at bay with flames.
• The Chomping Cabbage fled into the Devil's Snare, and Harry and Ron encouraged Neville to open the envelope.
• Neville opened the envelope, and Professor Sprout's figure appeared in midair.

Harry, Ron, and Neville cleared the Herbology challenge first and earned Gryffindor fifty points, then found a room full of flying keys and returned to their dormitory. The next morning, their ninety-point gain spread through Hogwarts, leaving Hermione to wonder whether her absence had been holding Gryffindor back.

• Harry realized Professor Sprout had awarded his team fifty points, meaning they had cleared the Herbology challenge before Isaac's team.
• Neville suggested Isaac's team might have missed the Biting Cabbage, and Harry, Ron, and Neville agreed to share their solution with Isaac.
• Harry, Ron, and Neville entered the next room and found it filled with flying keys, which Harry connected to Seeker training.
• The three boys returned to their dormitory, then woke early and saw that Gryffindor had gained ninety points.
• Ron told Hogwarts about their achievement, and the news reached Hermione, who wondered whether she had been responsible for Gryffindor's earlier losses.

Hermione questioned Harry, Ron, and Neville about how they had passed the Chamber of Secrets trials, then learned that Hufflepuff had gained another fifty points by skipping a stage. Harry’s trio decided they could try the same shortcut, and Harry later visited Isaac to share how to get through the Herbology stage.

• Ron greeted Hermione smugly, then quickly tried to appease her when Harry reminded him about their homework.
• Hermione asked Ron, Harry, and Neville how they had opened the Chamber of Secrets door, but none of them knew why it had opened.
• Hermione told the trio that Hufflepuff had gained another fifty points, and Harry realized they could use the Unlocking Spell to skip the Herbology stage.
• Harry and Ron decided to try skipping the key-catching stage so they could reach the Sorcerer's Stone before the Slytherins.
• Harry visited Isaac during lunch and offered to explain how to clear the Herbology stage, while Isaac pretended to be surprised.

Harry told Isaac and the Hufflepuffs how he understood the Herbology challenge, then learned about the dangers of the Charms challenge. After Harry and his friends left, Isaac organized the Hufflepuffs to prepare for Professor McGonagall’s Transfiguration challenge.

• Harry explained that the bonus envelope in the Herbology challenge was hidden behind Devil's Snare vines with a Biting Cabbage, and Isaac thanked him.
• Hermione learned that the secret chamber’s door would not open while someone was inside, easing her worry about their failed attempt to enter.
• Isaac warned Harry, Ron, and Hermione that the Flying Keys reflected spells and grew faster and harder to track as their numbers dwindled.
• Harry confidently told Isaac that he and his friends might get farther than the Hufflepuffs had, then left with Ron and Hermione.
• The Hufflepuffs praised Harry for sharing his advice, and Isaac told them to practice conjuring large chess pieces for Professor McGonagall’s challenge.