Chapter Summaries

William met with Dumbledore to examine a Goblin Gem and received Dumbledore’s Deluminator, which had been inspired by the gem. Dumbledore recalled the conflict with Aberforth over taking Ariana to Hogwarts, leaving Ariana’s condition and the brothers’ disagreement unresolved.

• The Sorting Hat praised Dumbledore’s musical performance and joked about its supposed tan from France.
• William gave Dumbledore a Goblin Gem, which Dumbledore examined and said would require special tools to verify.
• William fed Fawkes cuttlefish treats, provoked him about the Thunderbird, and caught a burst of phoenix fire.
• Dumbledore gave William the Deluminator and explained that it could absorb, store, and restore light.
• Dumbledore remembered a night in Godric’s Hollow when Aberforth said he would take eleven-year-old Ariana to school, and Albus objected because of her condition.
• Aberforth accused Albus of not caring about Ariana and threw Albus’s Prefect Badge out the window while Ariana watched silently.

Albus comforted Ariana as she mourned being unable to attend Hogwarts, while Dumbledore explained why Grindelwald and a young companion had sought Egypt’s Prehistoric Mysteries. He revealed that Arya Grindelwald had been chosen as the sacrifice to resurrect Cleopatra VII.

• Ariana asked Albus not to be angry with Aberforth and wondered why she had not received a Hogwarts letter; Albus promised she could write to Hogwarts and offered to make her a Deluminator.
• Albus told Ariana that Nicolas had lent him the Philosopher’s Stone and promised she would live for centuries, then agreed to prepare her a birthday gift.
• Dumbledore told William to keep the Goblin Gems and ignore the Goblins’ demands for magical objects.
• Dumbledore explained that Grindelwald and an ambitious young man had planned a pilgrimage to Egypt to seek the Prehistoric Mysteries and the Deathly Hallows.
• Dumbledore revealed that Grindelwald’s group intended to resurrect Cleopatra VII and had selected Arya as the sacrifice.

William learned that Arya hosted Cleopatra VII’s soul and was heading to Egypt to find a way to kill her, while Dumbledore monitored the situation. Dumbledore then revealed his youthful plans with Grindelwald and named Constantinople as the destination of their planned pilgrimage.

• William questioned how Grindelwald’s plans to resurrect Cleopatra fit with Arya’s age, and Dumbledore explained that Rosier had placed Cleopatra’s soul in Arya’s body.
• Dumbledore told William that Arya was going to Egypt to free herself from Cleopatra, and that Bill Weasley was watching events there.
• Dumbledore revealed that Arya had probably exposed Cleopatra’s tomb to guide Gringotts wizards into helping her reach it, and he said Cleopatra was the greater threat.
• William asked about Dumbledore’s friendship with Grindelwald, and Dumbledore recalled their shared plans to collect the Deathly Hallows and change the world.
• Dumbledore described their planned pilgrimage from Godric’s Hollow through Rome, Greece, Egypt, and Jerusalem, ending at the center of the old world; William guessed Constantinople.

William discussed Dumbledore’s history with Grindelwald and noticed Hermione had used her Time-Turner. Checking the Hogwarts map, he discovered a third Hermione in Moaning Myrtle’s Bathroom and went to find her.

• William joked with Hermione, who demanded the Goblin Gems piece after hearing he had hugged another girl; he explained that Dumbledore had taken the gem and given him the Deluminator.
• William told Hermione about Dumbledore’s conversation regarding Grindelwald, and they discussed the two wizards’ blood pact.
• William realized Hermione had used her Time-Turner and warned her to eat enough while juggling classes.
• William checked the Hogwarts map and found Hermione in the Gryffindor Common Room, Hermione in the Great Hall, and a third Hermione in Moaning Myrtle’s Bathroom.

Hermione used the Time-Turner to attend overlapping classes and ended up trapped in a bathroom, hungry, because she could not risk meeting herself. William helped her eat, then concealed her when her other self appeared, but the breakfast-bound Hermione grew suspicious and cast Levicorpus on him.

• Hermione explained that she had used the Time-Turner to return for breakfast, only to find her earlier self already in the Great Hall and become unable to enter.
• Hermione told William she enjoyed Arithmancy, disliked Divination, and said Professor Trelawney had predicted Ron would die.
• William described Professor Burbage’s outlandish claims about Muggles and his plan to make Hogwarts the magic school with the highest market value.
• After Hermione finished eating, William revealed that the girl she had seen embracing him was Hermione herself.
• When the other Hermione approached, William lifted the hidden Hermione out of sight and covered her with a Disillusionment Charm.
• The breakfast-bound Hermione asked William who the girl was, then suddenly cast Levicorpus on him.

During Potions class, William endured gossip about Hermione and his romantic life before Snape taught the fourth-years about werewolves and an improved Wolfsbane Potion. The chapter ended with William copying Snape’s brewing instructions so he could try them later.

• Cho questioned William about rumors that Hermione had attacked him, and their conversation spread through the classroom.
• Snape silenced William and Cho, mocked William’s romantic reputation, and deducted ten points from Ravenclaw.
• Snape introduced the class to the Wolfsbane Potion and dismissed Marcus’s doubts about brewing it.
• Snape asked how werewolves infected people and how to treat their bites, and William answered the questions.
• Snape explained his improved Wolfsbane Potion, and William copied the instructions for later.

Professor Snape assigned an essay on how to make the Wolfsbane Potion painful and nauseating, while William and Cho joined Hagrid’s lesson about The Monsters' Goblin Book. William demonstrated a massage technique that made the books go limp, leaving the students eager to try it.

• Snape assigned an essay on adding ingredients to the Wolfsbane Potion to cause pain and nausea without weakening its effects.
• Jon Hart, Elena Kaslana, and Ivan Hals joked that Snape might be a Werewolf, and Snape dragged them back into the classroom.
• William and Cho encountered Hermione and the Gryffindors after Divination, where Ron had been frightened by Professor Trelawney’s prediction of his death.
• Fred and George teased William about Hermione and Ginny, while Cedric told him Professor McGonagall was covering Ancient Runes because Professor Babbling had not returned.
• Hagrid led the students to the Black Lake for Care of Magical Creatures, where Eloise’s spell sent McLaggen and his Goblin Book into the water.
• William massaged Cho’s Goblin Book until it relaxed, then explained his technique to the astonished students.

Hagrid took the class to the Black Lake to introduce and feed the Hippocampuses, while William recognized the reed bed’s reputation as Hogwarts’ secret trysting spot. When Hagrid invited the students to ride, William volunteered and successfully rode a Hippocampus into the water.

• Hagrid led the class along the Black Lake and described the reed bed’s secret nighttime visitors.
• Cho identified the Hippocampuses, and Hagrid explained their origins and history in the lake.
• The class fed the Hippocampuses, and one greedy creature knocked over a bucket to steal more fish.
• When the students hesitated to ride, William volunteered and earned twenty points for Ravenclaw.
• William mounted a vermilion Hippocampus and rode it underwater before it leapt back out of the lake.

A lesson on the Black Lake turned chaotic when a Monster Book of Monsters attacked a Hippocampus, prompting William to rescue the students before confronting the Merpeople princess. After she demanded that Cedric marry her and attacked, William summoned lightning against the Merpeople and left the lake full of fish.

• A Monster Book of Monsters bit Eloise's Hippocampus, causing it to rampage and throw riders into the lake.
• Cho jumped into the water to save Marietta, while William transformed into a sea eagle and helped Hagrid rescue the students; William then gave them Pepperup Potion.
• The Merpeople princess arrived with a group of Merpeople and asked William to summon Cedric.
• William told Cho that the princess wanted Cedric to take responsibility for her and marry her, and Cho insulted the princess without realizing she understood English.
• The Merpeople princess attacked with her trident, so William summoned the Thunderbird and directed lightning into the lake, driving the Merpeople away.

After McLaggen's mishap in Hagrid's lesson sent Gryffindor to last place, William and the twins questioned Cedric about his connection to the mermaid princess, while Ron was taken to the Hospital Wing after collapsing. Cedric blamed William to explain his involvement to Cho, and William headed alone to the Room of Requirement, unaware of the setup.

• McGonagall punished McLaggen with weekend detentions after he nearly caused a student to drown, and Gryffindor lost points and fell to last place.
• Hagrid awarded William fifty points for saving students, putting Ravenclaw in the lead.
• William and the twins confronted Cedric, who admitted he had met the mermaid princess after saving her and had asked her for hair from Fantastic Beasts.
• Fred and George teased Cedric about marrying the mermaid, and Cedric insisted he would never return to the Black Lake.
• Ron collapsed at the Gryffindor table, and Harry carried him toward the Hospital Wing as Fred and George joked about Trelawney's Grim prediction.
• Cedric went to Cho and blamed William for pursuing the mermaid princess, while William slipped away to the Room of Requirement.

William and Hermione planned to support Mormont’s Werewolf group with Wolfsbane Potion while considering how to use it to contain Werewolves and prepare for Voldemort’s return. After falling asleep together, they arrived late to Herbology, where Professor Sprout taught the class to collect Bubotuber Pus.

• Hermione suspected Professor Snape had hinted that a Werewolf was nearby, and William explained that helping Mormont could build an ally and help control Werewolves.
• William and Hermione discussed brewing Wolfsbane Potion for Mormont and William’s plans to build influence for the future.
• Hermione grew sleepy while working, and she and William nodded off together in the Room of Requirement, causing them to arrive late for Herbology.
• Cho teased William that he had visited the mermaid princess and threatened to tell Hermione he was flirting with her, while William noted that she was Cedric’s fiancée.
• Professor Sprout had the students squeeze Bubotubers and collect their valuable pus, which Madam Pomfrey could use to treat acne.

William learned that Malfoy had been injured by a Hippogriff rather than killed, while rumors and Ron’s fear of a death omen spread through Hogwarts. William, Cedric, and Cho visited Hagrid, who feared losing his job, as the Hippogriff faced possible punishment by the Ministry of Magic.

• William heard conflicting rumors about Malfoy’s death and eventually learned that Malfoy was only injured.
• Fred and George explained that Ron believed Anne’s black dog, Dahei, was the Grim and feared he was about to die.
• Fred and George went to the Hospital Wing to check on Malfoy and hear how the school would handle Hagrid’s case.
• William, Cedric, and Cho visited Hagrid, where Anne and Hermione tended to the injured Dahei outside the hut.
• Hagrid worried that the School Governors would dismiss him, while William realized that the Hippogriff was more likely to face a death sentence from the Ministry of Magic’s Beast Division.

Harry’s fight with Malfoy earned Gryffindor another points penalty and weekend detentions, while William and the other students faced mounting schoolwork. In Defence Against Dark Magic, Lupin recalled how Peeves once armed himself with a Gatling gun and forced Hogwarts to evacuate.

• Harry fought Malfoy after Malfoy swaggered around boasting, and Snape caught Harry and gave Gryffindor a fifty-point penalty and weekend detention with McLaggen.
• Hagrid remained at Hogwarts as a probationary teacher, while Malfoy wrongly assumed his father had secured the demotion and claimed Hagrid would soon be driven out.
• Professor McGonagall warned her students that their O.W.L.s were approaching and assigned heavy Transfiguration homework, while William struggled to find time for his studies.
• A Boggart transformed into Snape in Defence Against Dark Magic, and Neville dressed it in Mrs. Longbottom’s clothes, prompting rumors and plans by the twins to sell pictures.
• Snape exploded a cauldron during Potions and took points from every Gryffindor in the class, blaming them for using too much of the room’s air.
• In Lupin’s lesson, Peeves sang about four former students before Lupin recounted how Peeves had escaped their trap, seized weapons including a Gatling gun, and caused Hogwarts to be evacuated for three days.

Professor Lupin introduced the class to Augureys and taught the students how to silence them with the Silencio spell. When Andrew Kirke tried the spell without his earmuffs, the Augurey's cry enchanted him into striking a strange toad-like pose, leaving Lupin puzzled.

• Professor Lupin revealed an Augurey and asked the class to identify it, prompting Marietta to answer correctly and earn Ravenclaw five points.
• Professor Lupin joked about learning History of Magic from Chocolate Frog Cards and explained that the Augurey's cry could enchant listeners.
• Professor Lupin taught the class that silencing an Augurey could prevent it from casting, and he led them in practicing the incantation Silencio.
• Professor Lupin gave the students earmuffs and called Andrew Kirke forward to try the spell on the Augurey.
• Andrew Kirke removed his earmuffs, quickly dropped his wand, and began performing a strange toad-like stance as Lupin wondered why he had failed so quickly.

William resisted the Augurey's bewitching cry, then freed Fred and George from a spider-silk trap in Filch's office. He helped the twins turn a Boggart into Snape in ridiculous outfits, then left as they continued tormenting it.

• William resisted the Augurey's influence while most students failed to cast the Silencing Charm, prompting Lupin to reconsider his lesson plan.
• William found Fred and George trapped in Filch's office and cut them free with his wand.
• Fred and George explained they had entered the office to steal a Boggart they hoped to use to dress Snape in women's clothing.
• The Boggart appeared as Mrs. Weasley and then McGonagall, and George used Riddikulus to turn her into a tabby cat.
• William focused on Snape so the Boggart would take his form, and Fred used Riddikulus to dress Snape in a woman's outfit.
• The twins photographed Snape in the dress and changed his outfit again, while William hurried away.

William researched the Peverell family and the Deathly Hallows in the Restricted Section, tracing several legendary objects to their likely owners. He then uncovered a link between Corvinus Gaunt and Professor Babbling, before a book suddenly played loud moans across the library.

• William entered the Restricted Section and read that Ignotus Peverell’s descendant Iolanthe married Hardwin Potter, leading him to suspect Harry’s Invisibility Cloak was a Deathly Hallow.
• William reviewed clues about the nine Deathly Hallows and concluded that Dumbledore likely possessed the Elder Wand, while the Resurrection Stone and the potion-brewing cauldron remained unaccounted for.
• William found that Corvinus Gaunt had married a Veela named Babbling and was last seen in the City of Seven Hills, prompting him to connect the name to Professor Babbling.
• A phoenix book in William’s Safety Watch opened to Professor Babbling’s face and played loud moans throughout the library.
• William pointed his wand at the book and asked Professor Babbling if she was running.

William learned that Professor Babbling remembered the time loop and wanted him to teach Ancient Runes at Hogwarts while she stayed at Ilvermorny to watch Tom. The chapter ended with Babbling revealing that her serpent amulet was connected to Slytherin.

• Madam Pince banned William from the library for three days, so he used his Phoenix Book in an empty classroom to contact Babbling.
• Babbling showed William the Magical Congress hall, where she had clashed with American Aurors while retrieving Newt's belongings after Newt was detained and his Thunderbird went missing.
• Babbling explained that she had come to the United States in Newt's place and needed William to cover her Ancient Runes classes at Hogwarts.
• Babbling said William's knowledge from the time loop qualified him to teach and revealed that she knew about the Ravenclaw Ring.
• Babbling turned over her amulet to reveal a serpentine S, leading William to suspect it was connected to Slytherin.

Professor Babbling revealed her plan to impersonate an older William in America and infiltrate Tom Riddle’s faction, while William agreed to prepare by teaching Ancient Runes at Hogwarts. The chapter ended with Babbling offering him only one Sickle for his teaching work.

• William suspected Babbling had unusual ancestry, but she refused to explain her origins.
• Babbling told William that Tom Riddle would build a powerful faction at Ilvermorny and that they needed him to sever his symbiotic Horcrux connection with Voldemort.
• Babbling explained that she would use Human Transfiguration to pose as an eighteen-year-old William in America, backed by a flawless identity and her secret ties to Durmstrang Institute.
• William realized Babbling planned to use her resemblance to him to attract Tom’s interest and infiltrate his organization as a double agent.
• Babbling asked William to teach third-year Ancient Runes so he could later take over her identity as Professor Targaryen.
• William demanded a share of Babbling’s salary, but she calculated that his teaching work was worth only one Sickle a month.

William joined Hermione’s third-year Ancient Runes class and revealed that he would teach it for the term. He began his new role by taking ten points from Slytherin for Malfoy’s lateness, while reminding Hermione of their bet.

• William and Hermione wagered that she would earn more than ten points in Ancient Runes, with the loser agreeing to do anything the winner asked.
• William accompanied Hermione to the Ancient Runes classroom, where the students speculated about who would teach them.
• Professor McGonagall arrived and scolded the noisy class before allowing William to take over the lesson.
• William announced that he would temporarily teach third-year Ancient Runes, leaving Hermione stunned.
• Malfoy arrived three minutes late, and William deducted ten points from Slytherin before winking at Hermione about their bet.

William taught the students about Ancient Runes, revealing that Hogwarts Castle’s layout formed the Helm of Awe and explaining how runes could be used to create magical products. He left the class eager to study the subject and pursue work at Akali's Mystery Shop.

• William showed the class an aerial view of Hogwarts and explained that its layout formed the defensive rune called the Helm of Awe.
• William said the castle’s ancient magic could create a powerful shield to protect students during an attack.
• William demonstrated how the runes Mannaz and Kenaz gave a Warming Badge its effect, and warned that runic meanings could also produce dangerous results.
• William explained that making stable alchemical products required trade secrets, then invited students to apply to Akali's Mystery Shop after graduation if they earned an O on their O.W.L.s exams.
• William promised to teach the class the uses and hidden history of Ancient Runes, and the students applauded.