Chapter Summaries

Muen enchanted a painting of a cat and began making portraits of cats to watch over Hogwarts. Dumbledore showed him a threatening Howler sent to Harry, then asked about anonymous school surveys as Snape arrived with more Howlers and a copy of the questionnaire.

• Muen painted a fat cat, brought it to life with his blood, and linked its portrait to Cendrillon's painting.
• Muen warned his Defense Against the Dark Arts students that their homemade talismans and potions would not protect them in a real battle, then continued painting his Hundred Cats Portrait.
• Cendrillon told Muen that Dumbledore wanted to see him, and Muen found a Howler intended for Harry in Dumbledore's office.
• The Howler threatened Harry and claimed that even Dumbledore would not be able to protect him; Dumbledore said the threat likely involved pressure from the Ministry or Board of Governors.
• Dumbledore showed Muen an anonymous questionnaire about the House Cup, Quidditch, Slytherin, and its eight consecutive victories, and Snape entered carrying three Howlers and the same questionnaire.

Snape and Dumbledore discussed outside pressure on Hogwarts as Harry’s questionnaires exposed Slytherin’s prejudices and ended the pure-blood password bet. Draco rejected a strange notebook and defended Slytherin against two Hufflepuffs, then continued toward the library.

• Snape warned Dumbledore that pure-blood families were looking for an excuse to interfere with Hogwarts, and Dumbledore said they had anticipated it.
• Mu En accepted Dumbledore’s ambiguous approach and left to paint, while Snape voiced concern for Harry and the school.
• Harry collected more than one hundred and twenty questionnaires, won the bet, and Slytherin stopped using a pure-blood-related password.
• Draco left the Common Room for the library and found an old notebook promising to help him get what he wanted.
• Draco called the notebook rubbish and left it behind, then told two Hufflepuffs that Slytherin would not bother attacking nobodies who merely followed gossip.

Mu En and the professors discussed Dark Magic and the risks of educating young wizards before a painted cat alerted them to another attack. At the scene, Mu En reconstructed the assault on Marcus Flint and saw the attacker unleash a violent burst of magic.

• Cedric successfully cast Expelliarmus in Mu En's lesson and earned five points for Hufflepuff.
• Mu En discussed Dark Magic items and student safety with Flitwick and Snape at the Hog's Head Inn, then described his controlling but capable former teacher.
• A painted cat summoned Mu En, Flitwick, and Snape to Hogwarts, where McGonagall told them Marcus Flint had been attacked.
• Mu En examined the damaged paintings and used traces of blood to reconstruct the attack, revealing that a hunched figure had cast Dark Magic at Flint before releasing a powerful burst of magic.

Mu En investigated Flint’s attack, cleared Neville of suspicion, and vowed to kill whoever was responsible. As rumors spread through Hogwarts, Harry and Draco overheard Flint’s parents discussing a Ministry investigation and contacting Rita Skeeter.

• Mu En examined Flint in the hospital wing and learned he had suffered the Cruciatus Curse, missing bones, and Dark Magic wounds.
• Mu En shared his memories with Dumbledore, then inspected Neville’s wand and confirmed that someone else had used it to cast Dark Magic.
• Dumbledore said he would keep Neville under observation, while Mu En insisted he wanted to kill the attacker.
• Phineas warned Dumbledore that the attack could prompt the old families and the Ministry of Magic to interfere with Hogwarts.
• News of Flint’s attack and the first snowfall spread through the school, fueling rumors and suspicion, while Harry and Draco dismissed gossip blaming Harry.
• Harry and Draco overheard Flint’s parents discussing his condition, criticizing Dumbledore, and asking Doreas to contact Rita Skeeter.

Rita Skeeter published a sensational report accusing Dumbledore, Harry, and Mu En of wrongdoing at Hogwarts. Mu En set out to visit the reporter at the Daily Prophet’s main office, while Harry, Hermione, and Draco realized what was coming.

• Hermione showed Harry and Draco Rita Skeeter’s report, which accused Harry of attacking students and criticized Dumbledore and Mu En.
• Harry said Skeeter would be in trouble because Mu En hated people making an issue of his cat-like head.
• At the end of the school week, Harry, Hermione, and Draco went to Mu En’s office to ask how they would travel home for the holidays.
• Mu En said he was going to visit a reporter, then vanished; Harry told Draco and Hermione that he had predicted Skeeter’s fate.
• Mu En appeared in Diagon Alley, used a golden ticket and the name Willy Wonka to get past the Daily Prophet’s receptionist, and entered the office.

Mu En confronted Rita Skeeter over her false reports and discovered she was an unregistered Animagus who could turn into a beetle. Dumbledore and Mu En began searching Hogwarts for an infiltrator, and Snape suddenly recognized Ron Weasley as their first suspect.

• Mu En confronted Rita Skeeter in her office and threatened her to stop publishing false reports about him.
• Mu En caught Rita in beetle form, realized she was an unregistered Animagus, and left her under a curse that made her bark like a dog.
• Mu En told Dumbledore about Rita’s beetle form, and they arranged to search the school and its students’ pets for an infiltrator.
• Harry and Hermione met Ron, who asked Fred and George to find medicine for his sick rat, Scabbers.
• Snape spotted Harry, Hermione, and Ron in the Great Hall and declared that he knew whom to investigate first.

Mu En and Snape exposed Scabbers as Peter Pettigrew in the Great Hall, where Snape lost control and attacked him with the Cruciatus Curse. Mu En restrained Pettigrew and sent the children to Dumbledore’s office, leaving the prisoner unable to transform and escape.

• Snape tried to take Ron’s rat, but Mu En recognized that something was wrong when Snape reacted to seeing it.
• Snape used Legilimency and discovered memories linking Scabbers to Peter Pettigrew’s betrayal of James and Lily Potter.
• Mu En stopped Snape from casting another curse, and Scabbers transformed into Peter Pettigrew.
• Pettigrew claimed Snape wanted to kill him, but Snape cast the Cruciatus Curse on him before Mu En could intervene.
• Mu En froze the Great Hall’s occupants, stopped Pettigrew from using Neville Longbottom’s wand, and ordered Snape to take the children to Dumbledore’s office.
• Mu En bound Pettigrew with chains and a rune that prevented him from changing into his Animagus form.

Snape tried to take Peter Pettigrew to Dumbledore while Harry, Hermione, and Ron followed, but Peter unleashed the Dark Lord’s power and killed Ron. Peter’s power overwhelmed the group, and his wand began to break apart just before a huge explosion engulfed the stairwell.

• Snape summoned his Patronus and led the children upstairs with Peter, while Harry insisted they bring Peter to Dumbledore first.
• Peter bit a piece of flesh from Ron’s palm, then invoked his master’s power and broke free of Snape’s chains.
• Peter’s black magical flames ignored the group’s attacks and killed Ron as he protected Hermione.
• Snape shielded Harry and Hermione from Peter, who raised Ron’s wand and cast Avada Kedavra as it cracked apart.
• A thunderous explosion tore through the stairwell, and Harry pulled Hermione into his chest.

Mu En stopped Snape’s magical self-destruction, cursed Ron to prevent him from truly dying, and learned that Riddle’s Diary might explain why Pettigrew had targeted Ron. The chapter ended with Mu En confronting Mr. Flint over his reaction to the diary.

• Snape unleashed a ritual-triggered magical explosion, but Mu En, Dumbledore, and Fawkes contained it while Harry and Hermione survived.
• Mu En found Ron’s soul still present and cursed him in the name of the King of the Seven Seas, restoring him as an existence neither alive nor dead.
• Dumbledore treated Snape’s injuries and took Harry, Hermione, and Ron to the hospital wing, where he and Mu En questioned why Pettigrew had tried to kill Ron.
• Ron remembered Riddle’s Diary, and Mu En noticed Mr. Flint react strangely to its name before confronting him.

Mu En confronted Marcus Flint about Tom Riddle’s Diary and entered Flint’s soul realm, where he faced the diary’s teenage Riddle soul. After Mu En expelled Riddle and Dumbledore removed the diary, Flint woke and was told to rest while he recovered.

• Mu En questioned Marcus Flint about Tom Riddle’s Diary, then used Mind Invasion as Flint began to resist.
• Dumbledore sent Harry and the other children out, cut open Flint’s abdomen, and found the diary inside.
• In the Soul Realm, Mu En identified the diary as Riddle’s first Horcrux and accused Riddle of using Peter Pettigrew and Flint to pursue his plans.
• Riddle admitted he had wanted Ron Weasley killed so his existence would remain secret, and Mu En drove him out of Flint’s body.
• Dumbledore removed the diary and healed Flint’s wound, and Mu En reassured the frightened Flint that he should rest and recover.

After the Chamber of Secrets incident was resolved, Harry explained that Snape had been injured protecting them, while the professors discussed the aftermath. Mu En and Dumbledore considered using the diary to investigate Voldemort and train students in Occlumency, and Mu En proposed a school duelling tournament and a veteran guest instructor.

• Harry told Hermione that Peter Pettigrew had been his father’s friend and had been recorded as a brave Gryffindor who died pursuing Sirius Black.
• Harry told the students that Snape had been seriously injured while protecting him and Ron, and Flitwick checked on the children before meeting Dumbledore, McGonagall, and Mu En.
• Mu En sent Cedric to tell Moaning Myrtle that the Chamber of Secrets matter had been resolved and to ask whether she would leave the girls’ bathroom.
• Dumbledore declined McGonagall’s suggestion to announce the resolution publicly and arranged an early Christmas feast to reassure the students.
• Mu En and Dumbledore discussed using the diary to investigate Voldemort’s past and as a tool for training students in Occlumency.
• Mu En proposed holding a school duelling tournament and asking one of Dumbledore’s old friends to teach the students.

Mu En witnessed the grief of the portraits whose loved ones had died, then warned Ron about his cursed undead body and gave him a new wand. The chapter ended with Mu En resuming a conversation with Lucifer, who said they were in Athens.

• Mu En saw a bizarre funeral banquet in a painting and watched Sir Earnest refuse Cendrillon entry, after which she returned to the Empty Classroom and sobbed in the giant cat’s embrace.
• Mu En warned Ron that moonlight turned him into a skeleton and told the twins not to treat his cursed body as entertainment.
• Mu En gave Ron a new wand as a Christmas gift, while refusing the twins’ request for gifts because their grades had improved less.
• Mu En returned to his office and asked Lucifer where they were; Lucifer answered that they were in Athens.

After resolving the Hogwarts crisis, Mu En took Harry to Athens to search for Ancient Greek magical knowledge. A Greek Ministry employee revealed that someone had infiltrated the Ministry and stolen original works by Pythagoras and Hippasus, and Mu En learned the Ministry was located at Areopagus.

• At the pre-holiday feast, Dumbledore announced that the Chamber of Secrets problems had been resolved, and Mu En noticed Ron clutching chicken legs with a bitter expression.
• Mu En took Harry and Ron back to Privet Drive, sent Hermione home, and later studied the Trident of Poseidon and Thales's Manuscript in his basement.
• Mu En and Harry traveled to Athens, where a magical shield around the Acropolis forbade flight, and Mu En explained the Greek origins of his magical studies.
• Near the Athens Academy and National Library, Mu En confronted a disguised Greek Ministry employee and challenged her about violating the Wizarding Secrecy Act.
• Mu En used a bewitching magical influence to question the employee, who revealed that someone had infiltrated the Ministry and stolen original works by Pythagoras and Hippasus.
• The employee told Mu En that the Hellenic Ministry of Magic was at Areopagus.

Mu En and Harry entered the Hellenic Ministry of Magic, where Mu En used magic to get them through the visitor registration process and investigate the restricted artifact-storage floor. They left after hearing Gilderoy Lockhart confidently mistake a three-headed dog’s hair for werewolf hair.

• Mu En removed a strand of Elsa Laisley’s memory, then Elsa Apparated with him and Harry to the entrance of the Hellenic Ministry of Magic.
• Elsa introduced Mu En to Gilderoy Lockhart, who claimed he had come to investigate the stolen artifacts.
• Mu En and Harry entered the Ministry, passed a statue of Themis, and registered as visitors without the clerk noticing Mu En’s magical interference.
• Mu En checked the third floor’s protective spells but avoided entering the artifact-storage area, then used magic to get himself and Harry through the complicated registration process.
• Mu En and Harry met Elsa again and heard Lockhart insist that hair from the Ministry’s three-headed dog was probably werewolf hair.

Mu En explained to Harry how ancient Greek wizards developed magic by studying the world and themselves, and described Human Transmutation. After meeting Ilvermorny Professor Rolfe Shackleton, Mu En learned that the professor believed wizards could only reach perfection by becoming gods, while Mu En rejected the need for wizards to claim that status.

• Mu En showed Harry a vision of how ancient spellcasters used lightning and fire, then came to study the world and derive magical formulas.
• Mu En demonstrated how analyzing the human body could lead to Human Transmutation.
• Rolfe Shackleton introduced himself to Mu En and recognized Harry Potter.
• Shackleton asked whether wizards could become gods, and Mu En said that even real gods would not be superior to humans or wizards.
• After Shackleton left, Mu En told Harry that Shackleton wanted to become a god, while he believed wizards did not need to.

Mu En taught Harry that learning Ancient Greek magic would require mathematics and searched the Sea God’s Temple without success. That night, he broke into the Ministry’s Important Cultural Relics Storage Room to copy ancient texts, where Gilderoy Lockhart and Aurors confronted him; Mu En offered to help recover the stolen books and was challenged to negotiate face-to-face.

• Mu En told Harry that mathematics would help develop the logical thinking needed for Ancient Greek magic, while warning him that he still needed to find his resolve.
• Mu En returned to Moonlight Castle after failing to find anything useful at the Sea God’s Temple and considered investigating the stolen works of Pythagoras and Hippasus.
• Mu En entered the Ministry’s Important Cultural Relics Storage Room as a shadowy puppet and copied ancient texts, including works by Bellerophon, Solon, Homer, Hesiod, and a star chart by Ptolemy.
• Gilderoy Lockhart and three others confronted Mu En, who explained that he only wanted to copy the knowledge and urged them to preserve and share the texts.
• Mu En offered to help recover the two stolen texts, and the Auror leader challenged him to negotiate face-to-face at an agreed time.

Uncle Mu En and Harry visited Bokar Market, where Harry gave a Galleon to a nearly naked man living in a barrel and received a newspaper scrap with a geometric diagram. After Uncle Mu En discovered a spell hidden in it, Shuckleton tried to take the scrap, and Loreton revealed that Shuckleton had come to meet a dark wizard—whom Uncle Mu En identified as himself.

• Uncle Mu En and Potter entered Bokar Market through a concealed passage opened with a Fibonacci Array.
• Uncle Mu En, Potter, and Shuckleton saw Lockhart entertaining fans at a café in the market.
• Harry gave a Galleon to a strange man living in a barrel, who handed him a newspaper scrap and told him to study geometry.
• Uncle Mu En found a spell hidden in the geometric diagram on the newspaper scrap.
• Shuckleton tried to take the scrap, but Uncle Mu En seized his wrist and demanded to know what he was doing.
• Loreton arrived and greeted Shuckleton, then Uncle Mu En revealed that he was the dark wizard they had come to meet.

Mu En negotiated with Loreton and Shuckleton to cooperate in investigating the theft of two ancient mathematical texts, then went to Charon’s tavern to buy information about the thief. When Charon resisted, Mu En petrified Alcaest and forced him to choose between taking the payment and working or fighting for it.

• Loreton shut Gilderoy Lockhart out of the private meeting and warned him against publicly revealing what he knew.
• Mu En agreed to cooperate with Loreton after learning Greece had no magical writings by the ancient sages, while Loreton promised to seek approval for additional knowledge as payment.
• Loreton described the theft of two mathematical texts by a thief using a powerful Confundus Charm, and Mu En asked to meet Charon, a tavern owner with a broad information network.
• Mu En confronted Charon at the Three-Headed Dog Bar and offered him a gold brick in exchange for information about the Pythagoras thief.
• When Charon refused and Alcaest moved to draw his wand, Mu En petrified Alcaest and demanded that Charon either take the payment and get to work or fight him.

Mu En forced Charon to investigate the relic theft, then uncovered clues at the Ministry of Magic and recognized the spell hidden in Harry’s newspaper. He explained fractal geometry to Harry and used magic to show him an experience of infinity, leaving Harry stunned by the vastness of the universe.

• Mu En cut off Charon’s arm and ordered him to produce information by the next day, then explained to Harry why he had left the task vague.
• Mu En examined the sealed relic room, used a Tracking Charm to learn that the thief had concealed himself with a Confundus Charm, and directed Loreton to check personnel records.
• Mu En found that Harry’s newspaper fragment contained an intricate Fractal Geometry spell and spotted Shuckleton beside Diogenes.
• Mu En taught Harry how fractal geometry could model infinite magical power and described why geometry mattered in Ancient Greek magic.
• Mu En struck Harry’s forehead and sent him through visions of infinite smallness and the universe, where Harry saw Mu En and Lucifer aboard a strange ship before returning to his body.

Harry learned that breaking through the crystal wall revealed the Chaos Sea, then Uncle Mu En investigated the theft of Pythagoras’s texts and taught him fractal magic. At the Ministry, Shuckleton shared an ancient account that appeared to describe someone discovering the hidden Academy of Athens.

• Uncle Mu En explained that Harry had seen the Chaos Sea beyond the world, and Harry followed him back from the alley.
• Shuckleton told Uncle Mu En that the thief might have sought the hidden Academy of Athens, which Raphael was said to have visited.
• Uncle Mu En questioned Diogenes about the stolen texts, but Diogenes denied any interest in them.
• Uncle Mu En taught Harry fractal magic at Moonlight Castle, and Harry made only slight progress by midnight.
• Shuckleton showed Uncle Mu En three ancient records at the Ministry, and Uncle Mu En read Finkel Scott’s account of being washed ashore before a beautiful estate marked with a warning about geometry.