Chapter Summaries

William and the others left the Devil’s Snare chamber and reached a room filled with flying keys, another obstacle in the route ahead. William used a water spell to knock down the keys, and Hermione found the one that unlocked the door; William then considered making the obstacle more dangerous when it was reset.

• William, the twins, Cedric, Cho, and Hermione left graffiti on the Devil’s Snare chamber wall before continuing through the corridor.
• The group found a locked door in a room full of flying keys and realized they needed to find the key that fit its lock.
• Hermione suggested using the Devil’s Snare to knock the keys down, but William cast Rain Tornado and swept the keys from the air.
• Hermione found the right key among the fallen keys, while Cedric decided to learn combat skills from William.
• William said Professor Flitwick could restore the obstacle and considered adding Fire-Making and Doubling Charms to make it harder.

William and his companions won the Wizard’s Chess challenge and took the animated pieces to study their alchemy. They entered the next room and became trapped between purple flames and Fiendfyre, while William noted the dangerous fire was still under control.

• William directed the black pieces to defeat the white side of the Wizard’s Chess challenge.
• William and Hermione concluded that the animated pieces combined Transfiguration with alchemy and discussed how Hogwarts’s defenses worked.
• The group stowed the defeated chess pieces, including the white king, in their enlarged pockets and passed into an empty room.
• William and his companions entered a room containing seven bottles, where purple flames sealed the door behind them and Fiendfyre blocked the way ahead.
• William identified the black flames as controlled Fiendfyre, and he grinned when George and Fred guessed he would study Dark Magic.

William and his friends solved Snape’s potion puzzle and crossed the Fiendfyre, only to discover that the final room was Dumbledore’s office. Dumbledore caught them there at midnight and began questioning them about breaking school rules.

• Hermione solved Snape’s bottle puzzle and identified the smallest bottle as the way through the black flames.
• William and his friends drank a few drops of the potion, and William took the remaining potions to study and try to make antidotes.
• William crossed the Fiendfyre first and found that the final room was Dumbledore’s office.
• Cedric and the others entered the office, and William urged them to leave when he recognized the room.
• Dumbledore emerged in his dressing gown with Bobocha, summoned chairs and milk, and asked how many points he should take for their rule-breaking.

Dumbledore punished William, Hermione, and their companions for breaking school rules, then restored most of their lost points for passing his challenges and offering suggestions. After the students left, Dumbledore looked into the Mirror of Erised and saw his deceased sister Ariana, grieving that he had failed to protect her.

• Dumbledore deducted points from the six students for sneaking out, entering the restricted area, taking supplies, disturbing his sleep, and writing on a wall.
• Dumbledore awarded the group points for completing his challenges and for Hermione's suggestions, leaving each student down only five points overall.
• Hermione decided to apologize to Dumbledore and write him further suggestions, while the others joked about their poor classroom reputations.
• Cedric spotted Snape returning from the restricted corridor, so William concealed the group and they hurried back toward their common rooms.
• Dumbledore studied the Mirror of Erised, saw Ariana and other loved ones, and apologized to Ariana for failing to care for her.

Dumbledore and Snape inspected the damaged obstacles protecting the restricted area and discussed the students who had entered it. After finding evidence of William’s magic, Snape worried that Stark could become the third-generation Dark Lord.

• Snape confronted Dumbledore about the students who had entered the restricted area, and Dumbledore said he had taken five points from each of them.
• Snape resisted looking into the Mirror of Erised, then asked Dumbledore what he saw in it.
• Dumbledore and Snape went to inspect the obstacles, and Snape restored the potions and redesigned the bottle puzzle.
• Dumbledore and Snape passed the waiting black queen and examined the damaged keys on the floor.
• Snape learned that William had invented the spell that had damaged the keys and warned that Stark might become the third-generation Dark Lord.

Dumbledore and Snape discussed William’s rapidly growing strength, with Dumbledore insisting that William’s family and capacity for love would keep him from becoming another Dark Lord. Their conversation ended with Dumbledore asking Snape to watch Quirrell, while Snape remained skeptical and left.

• Snape worried that William’s sudden rise in power might come from studying Dark Magic, but Dumbledore said William would not become a Dark Lord because he understood love.
• Dumbledore refused to explain William’s abnormal increase in strength and warned Snape that Voldemort would return, giving Snape a dangerous responsibility.
• Dumbledore collected the students’ graffiti and urged Snape to care less about their opinions and to help Harry more.
• Snape criticized Harry and praised Hermione, while Dumbledore defended Harry and asked Snape to keep an eye on Quirrell.
• Snape strode away without answering, and Dumbledore sighed.

William watched Cho impress the crowd at Ravenclaw Quidditch tryouts while hiding that he had stayed up late analyzing Professor Snape’s potion. After spotting an opportunity to buy Nimbus 2000s, he pushed his friends to order five and argued that Ravenclaw deserved an extra broom.

• William arrived late to the Ravenclaw Quidditch tryouts with a thermos and cushion, then lied to Cedric and Hermione about why he had not slept well.
• Cho raced around the pitch on a Nimbus 1700 and caught the Golden Snitch, drawing cheers and catching The Boy Who Lived’s attention.
• William suggested a witch on a broom as the logo for Akali's Mystery Shop, then joked that it also needed a black cat and a radio.
• George and Fred admired the Nimbus 2000 in Quidditch Through the Ages, and William proposed ordering five of the expensive brooms.
• Cedric pointed out that the order would leave Hufflepuff short of a broom, but William argued that Cho’s broom would be shared with Cedric and insisted Ravenclaw needed an extra one.

William joined Ravenclaw’s Quidditch tryouts as a Chaser and made all one hundred shots, prompting Professor Flitwick to plan a team built around him. As excitement over Quidditch spread, the twins began charging students to ride five newly delivered Nimbus 2000s, and William refused to lend them his broom.

• Cedric covered Cho’s name on his cheering banner with William’s name as William entered the field to try out for Chaser.
• William made ten open shots in a row, then Professor Flitwick directed the Quaffle to him until he had made one hundred shots from many positions.
• Professor Flitwick praised William, and the students began discussing how Ravenclaw’s Quidditch team could be rebuilt around his scoring and Cho’s search for the Golden Snitch.
• William dismissed doubts that his open-shot accuracy would translate to a match and said he would make opponents pay if they underestimated him.
• Thirty scops owls delivered a package containing five Nimbus 2000s, and the twin brothers started charging students to ride them around the grounds.
• The twins asked to borrow William’s broomstick, but he told them to get lost.

Hermione read William’s Quidditch notes while students gathered around, and Malfoy’s attempt to provoke Harry and start a conversation with Neville was interrupted by Professor McGonagall. As William and Cho arrived at Greenhouse Three for Herbology, Professor Sprout stopped William at the door.

• Hermione read William’s Quidditch notes to a crowd of first-years as they prepared for Flying Class.
• Malfoy showed off imported sweets, but the Slytherins took them all, and he taunted Harry about not receiving presents or letters.
• Neville opened the Remembrall from Mrs. Longbottom, which turned red, while Trevor was left alone in the locked History of Magic classroom.
• Malfoy took Neville’s Remembrall, but Professor McGonagall appeared and made him return it; Neville then worried that he had lost another map.
• George’s joke about Dumbledore’s map and William’s explanation sparked a rumor that Dumbledore had a Hogwarts map on his back and a blond wizard tattooed on his chest.
• William and Cho went to Greenhouse Three, where Professor Sprout opened the door and stopped William before he entered.

Professor Sprout asked William to brew Knarl repellent after pests damaged the greenhouse plants, then taught his class how to remove the teeth of Mouthy Flowers. The lesson ended with the students beginning their work among dangerous plants, while Sprout warned them to watch out for the teething Venomous Tentacula.

• Professor Sprout told William that damaged greenhouse plants might mean Knarls had invaded and asked him to brew repellent.
• William agreed to help, privately considering how many herbs he could request before Sprout revealed that Snape had once demanded far more ingredients than a potion required.
• Professor Sprout taught the class that Mouthy Flowers could provide ingredients for antidotes and warned that their sharp, poisonous teeth made them dangerous.
• Professor Sprout demonstrated how to anesthetize Mouthy Flowers and pull out their teeth, explaining that new teeth would grow and their fruit would become larger.
• Professor Sprout assigned the students to work in groups and warned them to avoid the nearby Venomous Tentacula, which was teething.

William witnessed McLaggen get swallowed by a Mouthy Flower and learned that Harry had been made Gryffindor's Seeker after Neville's flying accident. The chapter ended with Harry flustered by Cho, while William considered him another rival for Cedric.

• McLaggen fed fertilizer to a Mouthy Flower, which swallowed him until Professor Sprout tickled it and made it spit him out.
• William identified a Puffapod and considered having Cedric make prank Pea Wands from its bean-shooting ability.
• William heard that Neville had flown out of control in Madam Hooch's class, prompting Harry and Malfoy to confront each other while the professor was away.
• Wood's secret that Harry had been chosen as Gryffindor's Seeker reached William and Cho, and Cho resolved to keep training with Cedric.
• The Weasley twins told Harry they were Gryffindor Beaters, and Harry became tongue-tied when Cho looked at him.

William sold Malfoy an enchanted ring, and Malfoy challenged Harry to a midnight duel. Ron accused Fred and George of betraying the family by selling to Malfoy, prompting George to reveal that the twins had been sending their earnings home and had increased Ron’s pocket money.

• Malfoy asked William for an enchanted storage ring, agreed to pay two hundred Galleons for one bearing the Malfoy family crest and Slytherin emblem, and mocked Harry.
• Ron told Malfoy that Harry would remain at Hogwarts as Gryffindor’s Seeker, and Malfoy challenged Harry to a midnight duel in the Trophy Room with Crabbe as his second.
• Fred offered Harry help with dueling spells, but Ron angrily accused the twins of selling to Malfoy despite his father’s feud with Lucius Malfoy.
• William and Cho explained that they sold goods to students without quarrels with them, including Slytherins, and Ron accused the twins of benefiting from the sales.
• George revealed that he and Fred had sent money home every month and said Ron’s increased pocket money came from their earnings.

After Ron argued with Fred and George, Harry and Ron planned to duel Malfoy that night, while the twins secretly decided to keep them from getting caught. William went to the forbidden area on the fourth floor and discovered Harry, Ron, Hermione, and Neville running toward him with Filch in pursuit.

• Harry urged Ron to apologize to Fred and George, then asked Ron what a wizard’s duel and a second were.
• Hermione warned Harry and Ron not to duel Malfoy at night, but they dismissed her and she ran off.
• William learned that Fred and George planned to secretly help Harry and Ron sneak around, while he refused to join them.
• William left the Ravenclaw Common Room at 11:40 p.m. and headed for the forbidden area on the fourth floor to take more of Snape’s potion.
• William heard a crash and Harry’s shout, then saw Harry, Ron, Hermione, and Neville racing toward him on the map with Filch following.

William protected Hermione and the other students from Peeves, then entered the forbidden area to retrieve potions and found Snape’s brewing instructions. He left extra enchanted keys as a gift for whoever attempted the challenge next.

• William stayed hidden and used magic to drive Peeves away after he dropped foul liquid on Hermione and the others.
• Hermione opened the locked door, and she and the others escaped Filch before discovering the three-headed dog, Fluffy.
• Hermione calmed Fluffy and received a parchment map from William, then led Harry, Ron, and Neville away.
• William entered the trapdoor passage, found Snape’s instructions for brewing the potion, and took the potions from the table.
• William enchanted a flying key with a Doubling Charm and a Fire-Making Spell before leaving it for the next dream chaser.

After Harry, Ron, and Hermione escaped the three-headed dog, Hermione deduced that it guarded a trapdoor and Harry suspected the package from Gringotts was hidden beneath Hogwarts. Later, William gave Hermione an owl for her birthday, and she happily admired her presents.

• The Fat Lady let Harry, Ron, and Hermione into the Gryffindor common room, where Hermione scolded the boys for breaking school rules and pointed out the trapdoor beneath the three-headed dog.
• Harry wondered whether the package from Vault 713 was hidden beneath the trapdoor and suspected Hermione and William had already explored below it.
• Hermione called for William outside the girls' dormitory, but he did not appear, and she returned to her bed without the map.
• William admired the brewing instructions Professor Snape had given him, while Hermione did not mention returning the map the next day.
• On Hermione's birthday, William gave her a spot-bellied eagle-owl named Rhaegal, and Anne gave her a collector's edition Magical Creatures stamp album.
• Hermione happily counted her presents and admired the album while Rhaegal hooted for a snack.

William finished brewing Amortentia and encountered Harry and Ron outside the girls’ bathroom, where a terrified voice came from inside. He smashed through the bathroom door and part of the wall to reach whoever was in danger.

• William skipped History of Magic to finish brewing Amortentia in the Room of Requirement.
• William noticed Professor Quirrell and Professor Snape moving near the forbidden corridor on the Marauder’s Map.
• William found Harry and Ron cheering outside the girls’ bathroom and accused them of spying.
• A terrified voice rang out from the bathroom, and William rushed inside with Harry and Ron.
• William cast Diffindo on the bathroom door, bringing down part of the wall, and entered through the dust.

A Troll cornered Hermione in a Hogwarts bathroom, but William rescued her and killed the creature with a powerful water-based spell. Professor McGonagall, Snape, and Quirrell arrived afterward, and Snape wondered how William had cast such a lethal spell while his thigh began to ache again.

• Harry threw rubble to draw the Troll away from Hermione, while Ron urged her to run.
• William trapped the Troll with Impedimenta, checked Hermione for injuries, and gave her chocolate as she recovered from her fright.
• The Troll broke through William’s barrier, so he used Rain Curtain Condensation to slice off its head and kill it with water daggers.
• Professor McGonagall, Snape, and Quirrell arrived, and Snape examined the Troll’s wound and questioned William’s power.
• Snape glanced at the frightened Quirrell, felt his thigh ache, and suspected someone had set him up.

William killed a Troll that attacked Hermione, while Hermione, Harry, and Ron covered up how she had ended up in the bathroom. After the professors rewarded the students, William began to suspect that Quirrell had secretly orchestrated the incident.

• McGonagall questioned Hermione, Harry, Ron, and William about the Troll, and Hermione claimed she had gone looking for it alone.
• William backed Hermione's account, said he had killed the Troll, and asked how it had entered the school.
• Snape challenged William over missing class and the Halloween Feast, but McGonagall rejected his unsupported accusations.
• McGonagall deducted five Gryffindor points for Hermione, awarded Harry and Ron five points each, and gave Ravenclaw fifteen points for William.
• William gave Harry, Ron, and Hermione chocolate, then heard Harry and Ron recount the night's events.
• William wondered how Quirrell had gone from fainting in the Great Hall to appearing near the fourth-floor forbidden corridor, and suspected he was hiding something.

Snape confronted Dumbledore about the Troll attack on Hermione, and learned that Quirrell had captured the Troll and lured it into Hogwarts. As November arrived, Ravenclaw prepared to face Hufflepuff in the season’s first Quidditch match, with William relying on his knowledge of their players and Cho marking Cedric.

• Snape accused Dumbledore of allowing the Troll into Hogwarts, and Dumbledore explained that a black-robed wizard had abducted a Troll from the Forbidden Forest tribe led by Gulugulu.
• Dumbledore identified Quirrell as the wizard who captured the Troll, while Snape suspected Quirrell might also have attacked Gringotts.
• Dumbledore told Snape that he was using challenges to train Harry and draw Quirrell toward something he had hidden, but refused to reveal what it was.
• Dumbledore gave Snape Fawkes's tears to treat the bite Fluffy had inflicted on him, after Snape had tried to force his way past the dog.
• The Troll incident faded from attention, and Ravenclaw intensified Quidditch training ahead of its first match against Hufflepuff.
• William drew confidence from knowing Hufflepuff's players and tactics from the time loop, while Cho prepared to stop Cedric from catching the Golden Snitch.

William, Hermione, Ron, Cho, and Cedric discussed the mystery of the fourth-floor obstacles and suspected Professor Quirrell after learning he had gone there during the Halloween Feast. As the Gryffindor–Slytherin Quidditch match began, Lee Jordan called Harry’s team Hogwarts’ “platinum generation.”

• Hermione and Ron showed William their animated “Potter for the Win” banner, and Hagrid brought snacks to the Ravenclaw stands.
• Hermione and Ron told William that Harry had seen Professor Snape trying to get past Fluffy on Halloween Eve, and Hermione questioned why Dumbledore had built the obstacles.
• William revealed that Professor Quirrell had also gone to the fourth floor that night, prompting Cedric and Cho to suspect him.
• William argued that Dumbledore would have discovered any wrongdoing by Snape during his ten years at Hogwarts, and Ron decided to tell Harry to focus on Quirrell.
• The Gryffindor team took the field, and Lee Jordan praised Harry as the youngest player in nearly a century before calling the team Hogwarts’ “platinum generation.”