Chapter Summaries

After Breen defeated Voldemort, the Dark Lord writhed in agony as Narcissa and Bellatrix carried him to a guest room. Bellatrix unknowingly gave him a Potion from Amosta Breen, which stopped his pain but left his eyes crimson and prompted him to order her to take off her clothes.

• Voldemort appeared on the Malfoy lawn in agony, while the Twin Serpent Wand lay nearby.
• Narcissa considered killing the helpless Voldemort, but the Twin Serpent Wand rose into his hand and extinguished her murderous intent.
• Narcissa and Bellatrix carried Voldemort upstairs and laid him in a guest room, where he remained unable to control his body.
• Narcissa left to look for Potions, and Bellatrix gave Voldemort a mind-restoring Potion that Amosta Breen had given her.
• Voldemort's pain subsided and his eyes turned deep crimson before he ordered Bellatrix to take off her clothes.

Harry's gold watch transformed into Hermione's repaired Time-Turner, revealing that Amosta had given Harry, Ron, and Hermione objects tied to their past. Dumbledore concluded that Amosta wanted them to return to the past, while Draco hinted that there was something they needed to know.

• Sirius tried to remove Harry's glowing watch, but Dumbledore stopped him and recognized it as a gift from Amosta.
• Harry's gold watch transformed into a Time-Turner, which Hermione identified as the one that had broken in the Forbidden Forest.
• Hagrid and Professor McGonagall recalled how Amosta had helped resolve the Ministry's response to Hermione's broken Time-Turner.
• Harry explained that Amosta had given him, Ron, and Hermione gifts in gratitude for their help with the Chamber of Secrets; Dumbledore examined Ron's coin and Hermione's book.
• Dumbledore noticed a date in Hermione's book and realized Amosta had anticipated future events, then said he wanted them to return to the past.
• Draco told Dumbledore there was something they might want to know.

Draco described how Amosta retrieved a stone casket hidden beneath his old Slytherin dormitory floor, helping Dumbledore connect it to a planned journey into the past. Dumbledore revealed that Harry, Ron, and Hermione must travel to 1986 to obtain the Dark Witch’s blood and open a hidden chamber, leaving the witch’s identity unresolved.

• Draco told Dumbledore that Amosta had secretly dug up a stone casket from beneath his dormitory bed and taken it away after killing its Acromantula guard.
• Dumbledore connected the casket and Amosta’s reaction to Harry with the date in Amosta’s book, concluding that Harry, Ron, and Hermione had appeared at Hogwarts in 1986.
• Dumbledore explained that the trio had to travel back nearly ten years, obtain blood from the Dark Witch who attacked Amosta, and avoid contacting anyone but Amosta.
• Dumbledore instructed the trio to persuade Amosta to erase his memories of meeting them and of any future events they revealed.
• Dumbledore said the Dark Witch’s blood could help Amosta reach the stars and open a hidden chamber within Slytherin’s Chamber of Secrets, but he hesitated when Hermione asked who the witch was.

Dumbledore sent Harry, Ron, and Hermione back to December 1986 to find Breen Amosta, gain his trust, and obtain a blood sample and a memory of their meeting. After arriving outside the Hog's Head Inn and narrowly avoiding detection, the three saw Hogwarts still standing and set out to rebuild it.

• Dumbledore explained the mission and warned Harry, Ron, and Hermione to keep it secret and avoid changing history.
• Severus warned the three that Amosta might be hostile toward Gryffindor students, and Dumbledore gave Harry the Invisibility Cloak before sending them back in time.
• Harry, Ron, and Hermione landed noisily outside the Hog's Head Inn, drawing Aberforth out to investigate.
• The three hid under the Invisibility Cloak and waited until Aberforth and two passing wizards had gone before sneaking out of the alley.
• Harry, Ron, and Hermione saw Hogwarts standing peacefully above Hogsmeade and vowed to rebuild it.

Harry, Ron, and Hermione traveled through the Honeydukes passage into Hogwarts in 1986, planning to find Professor Breen. As they reached the castle, the commemorative coin began glowing red and floated out of Ron’s pocket.

• Harry, Ron, and Hermione entered the Honeydukes cellar through a smashed shop window and took the secret passage to Hogwarts.
• The three discussed being in 1986, including Peter Pettigrew’s presence with Percy and the possibility of warning Professor Dumbledore about Harry’s parents and Sirius.
• Hermione urged them to focus on finding Professor Breen quickly, and Harry proposed checking the library before waiting outside the Slytherin Common Room.
• After more than half an hour of running, the three reached the tunnel beneath the Hunchbacked Witch statue and caught their breath.
• A crimson light emerged from Ron’s pocket as the commemorative coin floated before them.

Harry, Ron, and Hermione followed Professor Breen’s glowing coin through Hogwarts to a conversation between young Amosta and Snape. They discovered how mistrusted and isolated Amosta had been, then watched him sense something near the office before the memory ended.

• Ron’s glowing coin floated through his hand, and Hermione realized it was leading them to Professor Breen.
• Harry, Ron, and Hermione followed the coin through the deserted corridors while hearing portraits condemn Amosta over his past use of Fiendfyre and question his hidden abilities.
• The coin led them to an office in the Slytherin Dungeon, where they overheard Snape warn Amosta against investigating the Dark Witch who had attacked him.
• Amosta refused Snape’s offer to go to London and said he would stay at Hogwarts, while Snape warned him not to cause more trouble.
• Snape told Amosta to stay in his dormitory and leave the investigation to Dumbledore, but Amosta noticed something by the office doorframe.

Harry, Ron, and Hermione followed young Amosta Breen through the castle and learned more about his isolation and friendship with Snape. After Bill Weasley stopped Amosta from leaving the castle, Amosta warned Bill not to follow him and went upstairs.

• Amosta left Snape's office after Snape warned him not to give Dumbledore more leverage against him, while Harry, Ron, and Hermione hid under the Invisibility Cloak.
• The trio followed the glowing coin to the Entrance Hall, where they watched Amosta see Snape leave the castle.
• Bill Weasley confronted Amosta and warned him not to enter the Forbidden Forest while he was still in detention.
• Amosta agreed to stay inside the castle, then went upstairs and warned Bill that following him was dangerous.

Harry, Ron, and Hermione followed the younger Professor Breen through Hogwarts, but he discovered them and stunned them. After tying them up in the City of Ruins, he questioned them and guessed that Dumbledore had sent them.

• Bill warned Harry, Ron, and Hermione not to follow Amosta, but they continued tracking him with the commemorative coin.
• Harry, Ron, and Hermione followed the younger Professor Breen through the castle until he led them into an empty corridor and attacked them with red lightning.
• Amosta found the three unconscious students, collected their belongings, and took them to the City of Ruins.
• Harry, Hermione, and Ron woke tied up, and Amosta questioned Ron about his identity and Percy.
• Amosta recognized Harry and Hermione, then guessed that Dumbledore had sent them.

Amosta questioned Harry, Ron, and Hermione about their journey from the future, but Delphi Riddle appeared and revealed that Amosta was already dead in their time. She proposed that she and Amosta join forces to kill Harry and choose a future in which Amosta survived.

• Amosta interrogated Harry, Ron, and Hermione, confirmed their identities, and demanded to know why Dumbledore had sent them back.
• Hermione explained that a crisis threatened the wizarding world, but Amosta questioned why his future self was absent and why Dumbledore needed his help.
• Delphi Riddle appeared, identified herself as Voldemort's daughter, and said Amosta had died in the future and that she had investigated his past for years.
• Delphi took the Time-Turner and proposed joining forces with Amosta to kill Harry Potter.
• Harry defended Amosta, while Delphi offered their alliance as a way for Amosta to choose a future in which he would not die.

Amosta questioned Delphi about why she had traveled through time to kill him, and she revealed that he had engineered her birth to secure victory over Voldemort. Delphi offered to spare Amosta if he let her kill Harry, then turned the Time-Turner as Amosta and the students realized her threat.

• Amosta learned from Delphi that his future self became a powerful wizard but died fighting Voldemort at the Battle of Hogwarts.
• Delphi claimed that Amosta's wounds had left Voldemort weak enough for Harry to defeat him, and explained that she had chosen Amosta as her target because she could not safely reach Harry.
• Delphi revealed that she hated Amosta for arranging Voldemort and Bellatrix's having her, and said her birth had been part of his plan for ultimate victory.
• Delphi offered to spare Amosta if he stopped opposing her and let her kill Harry, but threatened Harry, Hermione, and Ron regardless of his choice.
• Amosta shouted for Delphi to stop as she let the Time-Turner's golden sand spill from her palm.

Amosta appeared to consider joining Delphi after she destroyed the Time-Turner and promised him a chance to survive. He began moving toward her, leaving Harry, Ron, and Hermione to face her themselves.

• Delphi destroyed the Time-Turner and urged Amosta to abandon Dumbledore, arguing that Voldemort would win and Amosta could survive by joining her.
• Hermione pleaded with Amosta and cried out the name “Zhou Nan,” prompting Amosta to hide his surprise that she and the others knew it.
• Amosta asked how Delphi could protect him from Voldemort, and she offered to make an Unbreakable Vow and persuade her father to spare him.
• Amosta claimed that staying alive mattered more than becoming a respected wizard and coldly told Harry, Ron, and Hermione not to be disappointed in him.
• Amosta stepped aside and approached Delphi, but said he would not help her kill anyone and left the task of killing Harry and his companions to her.

Amosta tried to seize Delphi’s Time-Turner, but she activated it and Harry was dragged into the time stream with her. A mysterious hand pulled Delphi away, while Amosta sent Harry onward with a Time-Turner and told him to do what he must.

• Delphi accused Harry of causing Voldemort’s defeat and tried to kill him, but Amosta summoned the Time-Turner from her chest.
• The Time-Turner flew out of Amosta’s reach, and Delphi grabbed it and activated it as Harry bit her arm to keep hold of her.
• Harry and Delphi struggled through the time stream until a pale hand emerged from a frozen, crimson void and pulled Delphi away.
• Delphi accused Amosta of knowingly allowing her actions because they were part of history, and Amosta did not answer.
• A Time-Turner slipped around Harry’s neck, and Amosta’s voice sent him onward to do what he must.

Amosta learned that Harry had defeated Delphi with help from his future self, then discovered why Delphi had kept Harry from seeking Dumbledore. After learning the trio needed Delphi’s blood, Amosta realized the blood spilled when she died could replace the sample he had already used.

• Amosta freed Harry, Ron, and Hermione, and Harry explained that someone had helped him defeat Delphi.
• Amosta reasoned that Delphi had kept Harry captive because Dumbledore might have found the trio a way back to the future.
• Hermione revealed that Amosta had told them to use the name Zhou Nan to prove their identities and to withhold other future information.
• Harry told Amosta that the trio had come to collect Delphi’s blood, but Amosta said he had already used his sample to investigate the Forbidden Forest attack.
• Amosta noticed the blood from Delphi’s exploded chest on the floor and realized they could use it instead.

Amosta questioned Harry, Ron, and Hermione about the future and revealed that he had destroyed one of Voldemort’s Horcruxes. After learning that Delphi’s blood was being collected for an important purpose, he proposed a deal to find out why.

• Amosta examined the small vial of Delphi’s blood and asked Harry, Ron, and Hermione about the coin, the book, and the Time-Turner he had given them.
• Harry asked Amosta about Horcruxes, and Amosta explained how they worked and how making them damaged the soul.
• Amosta returned with Ravenclaw’s diadem, a Horcrux he had accidentally found and destroyed with Fiendfyre.
• Amosta told the trio about destroying the diadem, then picked up Delphi’s blood and proposed a deal.
• Amosta asked why Harry, Ron, Hermione, Dumbledore, and the others wanted Delphi’s blood.

Amosta questioned why the future had changed and learned that Delphi’s blood could open a mysterious door in the Chamber of Secrets. Hermione persuaded him to hide his memories until he returned to Hogwarts years later, and Harry, Hermione, and Ron began traveling back to their own time.

• Amosta wondered whether his interference had created an unknown future crisis and sought information about Delphi’s blood.
• Harry told Amosta about the Chamber of Secrets, the hidden cave, and a door that might help confront the future crisis.
• Harry confirmed that Amosta and Dumbledore believed Delphi’s blood could open the door.
• Hermione warned that Amosta must not investigate the Chamber early and asked him to extract and hide his memories of the meeting.
• Amosta returned Delphi’s blood, the book, and the coin to the three students, then the Time-Turner began taking Harry, Hermione, and Ron back to the future.

Harry, Ron, and Hermione returned to The Hog's Head Inn with the blood sample they had obtained, while keeping their journey into the future secret. As Dumbledore's health rapidly failed, he asked Grindelwald to take him to Hogwarts, with Harry guiding them to see what the founders had left behind.

• Harry reunited with Ginny and the others at The Hog's Head Inn, and Dumbledore asked him, Ron, and Hermione to keep their recent adventures secret.
• Harry showed Dumbledore the blood sample and noticed how severely Dumbledore's health had declined.
• Narcissa considered returning to gather information from the Dark Lord, but Dumbledore persuaded her to stay with Draco and the others.
• Dumbledore suddenly weakened, and McGonagall and Remus urged him to seek treatment while he insisted he had a few days left.
• Dumbledore asked Grindelwald to take him to Hogwarts and told Harry to guide them to see what the founders had left behind.

Harry, Dumbledore, and Grindelwald returned to Hogwarts to retrieve the Sword of Gryffindor and reach the founders’ hidden chamber. They stood before Slytherin’s sealed door, where Harry used a single drop of blood to begin opening it.

• Dumbledore took Harry’s bloodstained Time-Turner and said he would keep it safe, while Grindelwald levitated him and Harry toward Hogwarts.
• Harry asked about the floating Isle of Avalon and the magical beasts, and Dumbledore said Amosta would solve the problem.
• At Dumbledore’s office, Harry retrieved the Sword of Gryffindor, and Grindelwald carried the group to the second-floor girls’ bathroom.
• Harry spoke Parseltongue to open the entrance to the Chamber of Secrets, then led Dumbledore and Grindelwald through the underground passage to Slytherin’s sealed door.
• Dumbledore told Harry to use only one drop of the blood Amosta had provided, and Harry lifted a drop toward the stone door.

Harry, Dumbledore, and Grindelwald opened the ancient stone door, and the Hogwarts School Emblem appeared on Harry’s wrist, marking him as the one chosen to drive away the darkness. Dumbledore passed out after warning Harry to kill Voldemort’s snake first, and the group returned to Hogsmeade as Harry faced the losses and responsibilities ahead.

• Harry, Dumbledore, and Grindelwald opened the stone door with Harry’s blood and were bathed in its light.
• A streak of four-colored light struck Harry and left the Hogwarts School Emblem on his wrist; Dumbledore said the Founders had chosen him to end the darkness.
• Dumbledore told Harry to kill Voldemort’s snake first and said Amosta would explain more before he closed his eyes and went limp.
• Grindelwald carried Dumbledore out of the cave, and Aberforth helped him take Dumbledore to the Hog’s Head Inn.
• Sirius sent the exhausted crowd toward the tents, while Hermione, Ron, Ginny, and Neville stayed behind and watched Harry look up at the Milky Way.

Amosta completed a transformation beneath Azkaban and regained the memories Merlin and Herpo had sealed away. He recognized that the Tablet of Destiny was the key to the door between worlds, which Merlin had used to block Herpo’s passage.

• Amosta’s transformation shook Azkaban and drew the Dementors together, but his soul power drove them back.
• Amosta opened his eyes and realized that Merlin and Herpo had sealed his memories of the wizarding world.
• Amosta recalled the Harry Potter books and the Fantastic Beasts trilogy as his lost memories.
• Amosta summoned the Tablet of Destiny and understood that Merlin had cast it into the wizarding world to block Herpo’s path through the door to other worlds.

Amosta entered the world of death, merged the clay tablet with his soul, and gained the ability to appear anywhere in the world. After surveying the people and places affected by the battle, he arrived in Hogsmeade.

• Amosta left his body in the underground world and found that sustaining the world with his soul was draining him.
• He merged the clay tablet into his soul, then appeared before the Dementors on Azkaban Island and discovered he had lost his authority over them.
• Amosta appeared above Malfoy Manor, where Voldemort waited with Nagini and the Twin Serpent Wand, and sensed that Bellatrix was carrying Delphi Riddle.
• Amosta visited his grandparents in New York, Hope in Paris, Amelia at the Ministry of Magic, Louise in London, the orphanage where he grew up, and Anton Vogel near Bonn.
• Amosta arrived in Hogsmeade.