Chapter Summaries

Grindelwald left Madam Rosmerta and recognized that Brook intended to act against The Pious or Dumbledore. A month later, The Pious stole eighty “Big Gudu” from Israel, and President Walker’s inner circle debated how to respond, ending with Catherine suggesting they contact The Pious.

• Grindelwald left Madam Rosmerta’s bar and concluded that Brook had no intention of negotiating.
• The Pious stole eighty “Big Gudu” from Israel, prompting Israel’s leader to alert President Walker.
• Intelligence Minister Robert assessed that The Pious was the likeliest culprit, and Walker demanded that his department discover the group’s objective.
• Catherine suggested that the United States contact The Pious, and the officials understood the potential benefit.

Grindelwald rejected the United States’ attempt to use him as a weapon and planned to bring down the country, while Brook and Hermione prepared for their N.E.W.T. exams. Hermione struggled to find original essay topics for seven subjects as exam week approached.

• Catherine persuaded Walker and the U.S. officials to protect the mainland while pretending they knew nothing about Grindelwald’s weapons.
• Rosier told Grindelwald the United States offered intelligence and detonation sites in exchange for keeping the weapons off U.S. soil.
• Grindelwald told Rosier to take the United States’ benefits, leave twenty weapons for it, and make preparations without acting yet.
• During the following month and a half, Brook fused magic with his Tyrant Blade and developed a rough close-combat magical system.
• Hogwarts received O.W.L. and N.E.W.T. examiners, and the students learned that top marks required an original essay as well as written and practical exams.
• Hermione prepared essays for seven subjects, rejected Brook’s offer to use his work, and struggled to find viable topics with her professors.

Hermione completed seven essays after Brook secretly arranged for Harry and Ron to inspire her, and she thanked him when she realized what he had done. The N.E.W.T. examinations began, and Brook started the Charms Theory exam.

• Hermione struggled to develop her essay topics, so Brook discreetly had Harry and Ron provide her with ideas through staged conversations.
• Hermione completed seven essays, recognized Brook's involvement, and thanked him.
• The N.E.W.T. examinations began, and Hermione stood with Brook in the Entrance Hall before the Charms exam.
• Professor McGonagall opened the Charms examination in the Great Hall.
• Brook began answering a question about the role of will and gestures in advanced Charms.

Brook demonstrated his newly invented Blade of Contracts during his N.E.W.T. practical examination, using it to break a Bowtruckle’s contractual curse. Professor Marchbanks praised the spell and urged him to publish it, but Brook refused and began demonstrating another spell.

• After the written exam, Brook fed Hermione a dish prepared by Sanji, and Hermione remained distracted by her answers.
• Hermione entered her practical examination confidently, and Professor Flitwick called Brook in next.
• Professor Marchbanks asked Brook to demonstrate the Blade of Contracts on a Bowtruckle afflicted with a curse.
• Brook cast the spell, severing the curse and restoring the Bowtruckle’s wings and vitality.
• Professor Marchbanks praised Brook and urged him to publish the spell, but Brook declined and steered the examination onward.
• Brook took out Qingfeng and cast Prisma Immensum at Professor Marchbanks’s request for another demonstration.

Brook demonstrated the Kaleidoscope Prism, a spell that immersed examiners and candidates in a universe of recursively expanding detail and left the scholars eager to study its principles. The practical examination ran until midnight, and the next day Brook was scheduled to take his Transfiguration practical last so the examiners could speak with him afterward.

• Brook cast the Kaleidoscope Prism, transforming the examination room into an immersive cosmic vision that made several examiners and assistants dizzy.
• Professor Marchbanks praised the spell as a new magical principle, and Brook explained that it used emotional resonance to let viewers' minds create the details.
• The examiners paused the practical examination to discuss Brook's spell, delaying its completion until midnight.
• Brook completed the theoretical portion of the next day's Transfiguration examination with ease.
• Professor McGonagall told Brook that the panel had scheduled his practical examination last to avoid disrupting other candidates and to allow time to speak with him.
• After the final candidate left, Brook entered the Transfiguration examination room.

Brook demonstrated two revolutionary Transfiguration techniques before Professor Marchbanks and the other examiners, leaving them astonished by his ability to reshape both the environment and active magic. The chapter ended with the examiners marveling at Brook’s grasp of magical energy as he urged them to calm down.

• Brook showed Professor Marchbanks and the examiners how his Transfiguration Domain could turn nearby objects into weapons without a fresh spell or visible magical fluctuation.
• Brook explained that his domain prepared Transfiguration magic in advance and let him change objects with a thought.
• At Professor Marchbanks’s request, Brook transformed her incoming Stupefy into a swarm of butterflies.
• The examiners compared Brook’s feat to Dumbledore’s transformation of glass shards, but recognized that Brook had reshaped active magical energy itself.
• Professor Marchbanks praised Brook as a genius who had touched the level of rules, while Brook modestly cautioned the excited professors.

After Brook’s energy-conversion demonstration overwhelmed the examiners, he had Hermione draft an explanation for the recovering Professor Coster. The next day’s Herbology exam passed without incident, while Coster realized Brook’s work showed that Gamp’s Law of Elemental Transfiguration was wrong.

• Brook revived the unconscious Professor Coster with a potion and a calming spell, then sent him to the infirmary for further examination.
• Brook explained his energy-conversion principles to Hermione, who worked late with him to write a rough paper for the examiners.
• Brook and Hermione joked together in the library before Madam Pince sent them out for the night.
• Brook animated plants temporarily during the Herbology exam, while Hermione produced a dangerous Biting Cabbage and pumpkin hybrid.
• Professor Coster read Brook’s draft in the infirmary and excitedly concluded that Gamp’s Law of Elemental Transfiguration was wrong.

Brook gave Professor Coster several magical theory papers to refine and publish with both their names attached, then demonstrated his Dark Arts research to the examiners. He revealed a spatial-folding defense that made him intangible and began showing a related magic called Kamui.

• Professor Coster offered to refine and publish Brook's energy conversion paper, and Brook insisted that Coster be credited as a coauthor.
• Brook gave Professor Coster several more papers, and Coster agreed to refine and submit them.
• Brook entered the Dark Arts examination, where the examiners asked him to demonstrate the results of his research.
• Brook explained how he used folded space to make himself intangible, though he became vulnerable whenever he attacked.
• Brook named his next demonstration Kamui and caused space around a practice dummy to twist into visible vortex-like ripples.

Brook demonstrated Kamui to the N.E.W.T. examiners, then shared research with them as the examinations continued. After the final practical exam ended, he hosted a banquet for the examiners, while his and Hermione’s remaining days at Hogwarts began to count down.

• Brook demonstrated Kamui by removing a dummy’s arm, astonishing the examiners and explaining the magic’s limits.
• Brook answered the examiners’ questions and shared incomplete research papers, and Professor Coster agreed to collaborate with them on the papers.
• Brook completed the Ancient Runes examination and learned that the Seventeen-Nation Allied Forces had regrouped in Australia; he warned the Voldemort Cat to call him if danger arose.
• Brook sat the Potions and Care of Magical Creatures examinations, then identified unicorn hair in the final practical exam and completed his N.E.W.Ts.
• Brook held an appreciation banquet beside Hagrid’s Hut, where Professor McGonagall and Hermione watched him celebrate with the examiners.

Brook and Hermione spent Hogwarts’ final days exploring the castle, Black Lake, and Forbidden Forest while Brook shared his energy-conversion ideas with Professor Coster. At the forest’s edge, Hermione looked toward the sea with sadness, and Brook offered to continue exploring with her after the farewell banquet.

• Brook discussed energy conversion with Professor Coster, whose ideas suggested ways to expand the spell’s potential.
• Brook spent the days before the farewell banquet holding gatherings with professors and friends and strolling around Hogwarts with Hermione.
• Brook and Hermione explored the Black Lake, visited the Merfolk Village, and received parting gifts from Serendol.
• Brook and Hermione toured the Forbidden Forest, visited unicorns and centaurs, and Brook wiped out most of the Acromantula clan and captured a Chimera.
• At the coast, Hermione lamented that they had explored less than a third of the Forbidden Forest, and Brook offered to return with her after the banquet.

Hermione realized Brook’s sudden departure was tied to the escalating war and could only hope he returned safely. Brook arrived on the Australian battlefield to find Voldemort fighting Dumbledore, with Eula trapped in a block of ice.

• Brook left Hermione without explanation after receiving Voldemort’s urgent summons.
• Hermione connected Brook’s past disappearances to major events and worried that he was confronting Dumbledore.
• Brook appeared on the ruined Australian battlefield and saw Voldemort struggling against Dumbledore.
• Voldemort drove Dumbledore back with a Fiendfyre serpent and urged Brook to save Eula, who was frozen in a block of ice.
• Brook hurried toward Eula as Dumbledore lowered the Elder Wand and watched him.

Brook told Dumbledore that he had revived Voldemort because he hated Japan and wanted it erased, while Dumbledore explained how he had trapped Eula in an ice seal. Brook freed Voldemort from the Tightening Curse and called her his friend, then defended the war as a chance for wizards to live openly; Dumbledore warned that exposing wizards to Muggle weapons could lead to their destruction.

• Voldemort examined Eula while Brook greeted Dumbledore and asked how Dumbledore had sealed her in ice.
• Dumbledore explained that he had amplified Eula's own ice magic until its backlash trapped her, and that breaking the seal would harm her.
• Brook admitted that he had helped revive Voldemort because he wanted Japan destroyed, then removed the Tightening Curse from her and called her his friend.
• Brook said he had not meant for the war to grow so large but believed victory could let wizards live openly.
• Dumbledore condemned the deaths caused by the war and warned Brook that Muggle weapons could make open wizard society a path to destruction.

Brook confronted Dumbledore over the future of the Wizarding World, then called the hidden Grindelwald into the open and began fighting them both. The battle continued as the two wizards countered Brook’s powerful attacks.

• Brook told Dumbledore that the wizards needed to win and declared, “Magic. Is. Might.”
• Dumbledore decided to stop Brook and the others from exposing the Wizarding World to Muggles, while Brook prepared to fight.
• Brook sensed Grindelwald nearby and forced him to reveal himself; he then told Voldemort to watch Eula and attacked.
• Dumbledore blocked Brook’s fiery blade strike with a Shield Charm, and Grindelwald erased Brook’s redirected flock of black crows with a counterspell.
• Dumbledore bound Brook with chains of light, but Brook tore through them with a water-and-blade vortex; Dumbledore froze the vortex and sent shards of ice toward him.

Brook fought Dumbledore and Grindelwald, using his new blade techniques to withstand their combined magic and eventually striking at Dumbledore with a soul-destroying attack. Grindelwald took the blow to save Dumbledore and pleaded with Brook to stop, but Brook rejected his promise to end the conflict.

• Dumbledore and Grindelwald trapped Brook between falling ice spears and Grindelwald’s contracting Gas Stove Birdcage, but Brook erased a path through the attacks and charged at Dumbledore.
• Brook battled both wizards while Voldemort protected Eula’s ice sculpture from the magical aftermath.
• Brook spotted a gap in Dumbledore’s defense and used Godslayer: Annihilation to Emptiness to strike at him.
• Grindelwald shoved Dumbledore out of the attack’s path and took the blade through his chest, leaving him gravely wounded.
• Grindelwald asked Brook to spare Dumbledore and offered to keep him out of Magical World affairs, but Brook dismissed the promise as naive.

Grindelwald threatened to detonate Big Gudus around the world to force Brook to let Dumbledore leave, but Brook’s preparations blunted his leverage. Dumbledore then offered to cripple his own magic so he could take Grindelwald away, leaving Brook to decide whether to spare them.

• Grindelwald realized he could not accept Dumbledore’s death and revealed that The Pious had scattered Big Gudus around the world, awaiting his command to detonate them.
• Grindelwald offered to withdraw The Pious to Nurmengard if Brook let Dumbledore leave safely.
• Voldemort reassured Brook that Jia Xu had already taken control of The Pious members who infiltrated Great Xia.
• Brook said he did not care about the Big Gudus in Britain because his loved ones were protected, and challenged Grindelwald to detonate them.
• Grindelwald prepared to drag the world down with him and Dumbledore, but Dumbledore asked Brook to let them leave if he crippled his own magic.
• Brook considered whether to spare Dumbledore and Grindelwald, remembering his long resentment toward Dumbledore.

Brook defeated Dumbledore’s life-consuming Fire God Descent with Overlord Heartscape, leaving Dumbledore mortally weakened. Dumbledore and Grindelwald reconciled as they lay side by side, holding hands and nearing death.

• Dumbledore burned through his life force and unleashed Fire God Descent, filling the wasteland with flames that attacked Brook.
• Brook fought off the fire pillars with Mingyue, then used Overlord Heartscape to erase the flames with his will to protect.
• Dumbledore suffered a severe magical backlash and collapsed, while Grindelwald struggled to reach him.
• Dumbledore told Grindelwald that he wanted to live for himself and for him, and Grindelwald accepted his choice.
• Brook watched as Dumbledore and Grindelwald lay side by side with their hands clasped, their life forces fading.

After Dumbledore and Grindelwald died together, Brook freed Eula from the ice and faced her reprimand. In the afterlife, Dumbledore revealed he had known Grindelwald still controlled The Pious, leaving Grindelwald stunned.

• Grindelwald and Dumbledore died together as a silver thread carried their light away from the battlefield.
• Brook recalled Flying Pig, which broke Eula free from the ice, and Eula confronted Brook for delaying her rescue.
• Voldemort soothed Eula and defended Brook, who admitted his mistake and promised to rescue his allies sooner next time.
• In the afterlife, Grindelwald worried whether the legendary train would arrive, but Dumbledore told him their destination did not matter as long as they were together.
• Dumbledore confessed that he had always known Grindelwald never truly gave up control over The Pious, and explained that he knew Vinda Rosier remained loyal through Legilimency.

Dumbledore revealed that he had known about Grindelwald’s schemes all along, forgave him, and departed with him in a mysterious carriage. Elsewhere, the allied forces’ technologically superior army overwhelmed Voldemort’s forces across the Australian battlefield.

• Dumbledore told Grindelwald that he had seen through his disguise and plans since their first meeting at Nurmengard, and Grindelwald worried that he would be blamed.
• Dumbledore reassured Grindelwald that the International Confederation of Wizards was containing The Pious and that Grindelwald had caused no irreparable disaster.
• A silver carriage appeared through the mist, and Dumbledore and Grindelwald joined hands and entered it before it carried them away.
• The chapter shifted to the Australian front, where the allied army advanced against Voldemort’s poorly trained and outdated forces.
• Allied tanks, artillery, and aircraft devastated Voldemort’s defenses, while B-52 bombers dropped waves of bombs on his soldiers.

The Allied forces inflicted devastating losses on Voldemort's army while Brook held Eula back from joining the battle. After the first day's fighting, Eula warned that the army was close to collapse, while Voldemort trusted Brook to have a plan.

• The Allied forces overwhelmed Voldemort's poorly equipped troops, and their Death Eaters, ninjas, and Dementors achieved little against the Allies' countermeasures.
• Voldemort urged Brook to act before his army was wiped out, while Eula asked permission to join the fight; Brook told them to wait longer.
• At night, the Allied forces withdrew to comfortable fortified bases, while Voldemort's troops endured cold trenches with morale near collapse.
• Brook reviewed reports showing nearly one hundred thousand casualties for Voldemort's army and about two thousand for the Allies, a 50:1 loss ratio.
• Eula warned Brook and Voldemort that their army would likely collapse or surrender by the next day, and Voldemort said Brook must already have a plan.

After learning that American forces had killed members of The Pious and the wizard teams watching them, allowing seven Big Gudu devices to explode in major cities, Brook proposed retaliating against military targets rather than civilians. Voldemort ordered the army to prepare explosives, and the three of them arrived at a vast underground armory.

• Kato Dan brought Voldemort a report that an American operation had attacked The Pious, the International Confederation of Wizards’ team, and the Ninja-Wizard Squad.
• Seven Big Gudu devices exploded in American cities, including New York and Los Angeles, and destroyed the Statue of Liberty.
• Brook proposed bombing coalition camps and military bases, while Eula rejected attacks on civilians and agreed with his clarified plan.
• Voldemort ordered her forces to prepare their available explosives, and Brook, Voldemort, and Eula went to the underground armory.