Chapter Summaries

Sean visited Dumbledore and Snape after their potion trial for Nagini, then went to Newt Scamander’s suitcase to check on the creatures. He found the creatures terrified by a fight elsewhere in the cabin and went to investigate.

• Dumbledore and Snape decided to store blood while Snape improved the potion and Dumbledore searched for other solutions.
• Dumbledore warned Sean that treating Nagini would require considering her age, endurance, magic, and other factors.
• Sean asked Dumbledore about Snape’s history with the Potter family, but Dumbledore declined to share private details.
• Sean visited Newt Scamander’s office, where Pickett indicated that Newt was fighting a six-legged creature and asked Sean to help.
• Sean entered Newt’s suitcase and found the Magical Creatures huddled in fear amid crashes and roars; after calming them, he went to see what was happening.

Sean joined Newt in dealing with a dangerous Wampus Cat that had appeared in Newt’s case after causing trouble in Hogsmeade. Sean’s calming ability failed against the creature’s hypnotic and mind-reading eyes, and Newt decided they needed to find him a helper.

• Sean calmed an agitated Erumpent and found Newt struggling with a large creature in the mountain area.
• Newt dodged the Wampus Cat’s attack and explained that it had appeared in Hogsmeade before he brought it into the case.
• Sean tried to calm the Wampus Cat, but its black pupils hypnotized him and it charged at him.
• Newt’s Shield Charm blocked the Wampus Cat, and he explained how its eyes could hypnotize prey or read an opponent’s intentions.
• Newt judged that the Wampus Cat would not cooperate and said they needed to find Sean a helper.

Sean and Newt used a Runespoor to provoke the Wampus Cat into focusing on a fight instead of hypnotizing them. The creatures began battling, with Newt protecting the Runespoor as the Wampus Cat struggled against his barriers.

• The Wampus Cat waited in the trees, hungry and wary, while recalling how it had arrived from the Appalachian Mountains.
• Sean rode with Newt on the Runespoor, and Newt explained that the Wampus Cat would use Legilimency when it sensed a powerful enemy.
• Newt and Sean found the Wampus Cat hiding in a tree and baited it by having the Runespoor eat a large piece of food in front of it.
• The Wampus Cat attacked the Runespoor, and Newt cast Protego to shield it from the creature’s claws.

Sean and Newt subdued a Wampus Cat, and Sean calmed it by sensing its feelings through its Legilimency. Newt planned to care for it temporarily before returning it to its proper home, while Sean returned to Ravenclaw as final exams approached.

• The Runespoor and Newt restrained the Wampus Cat after it injured the snake, and Sean warned the Runespoor to keep its barbs retracted.
• Sean met the Wampus Cat's gaze and sensed its fear and grievance until it stopped struggling and approached him.
• Sean fed and soothed the Wampus Cat, while Newt praised him and sketched the creature.
• Newt said they would care for the Wampus Cat temporarily before returning it to where it belonged, and Sean agreed.
• Sean helped tidy Newt's shed, then returned to the brightly lit Ravenclaw Common Room as final exams neared.

As final exams approached, Dumbledore revealed that Newmontgard students would sit them alongside Hogwarts students while he and Snape worked on an antidote for Daisy’s Blood Curse and Obscurus. Sean stayed relaxed as he helped Hermione and cared for his magical creatures, then completed the exams and left school for the break.

• Dumbledore announced that the Newmontgard students would take the exams with Hogwarts, while he and Snape continued researching a solution for Daisy and asked Sean to help after the exams.
• The Hogwarts and Newmontgard students intensified their revision, while Sean visited Newt’s case, looked after the clingy Wampus Cat and Dave, and helped Hermione manage her nerves.
• During the practical exams, Sean transformed a rat into a snuffbox and earned Professor McGonagall’s approval, then faced Dumbledore’s enchanted dummy in Defense Against the Dark Arts.
• Sean finished the History of Magic exam using Hermione’s notes, doodled magical creatures on his scrap paper, and joined the students in celebrating the end of exams.

After the exams, Sean learned that Harry had hurried away after receiving a letter about Daisy. Dumbledore summoned Sean to Snape’s office, where Sirius arrived and reported that Daisy’s condition was very grim.

• Sean turned down the Weasley twins’ request to tame the giant squid, which disappeared into the lake.
• Ron and Neville told Sean that Harry had received a letter and rushed to the Professor’s Office, and Sean agreed to ask Dumbledore about his family.
• Charlotte delivered Dumbledore’s message, and Sean found Snape and Sirius facing off in Snape’s office.
• Dumbledore arrived and asked Sirius about Daisy, whose condition Sirius said was very grim.

Dumbledore, Snape, Sirius, and Sean began their attempt to weaken the Blood Curse and help Nagini resist her animalistic nature. The treatment started with Nagini facing the Mirror of Erised as Dumbledore drew blood from her, leaving her trembling.

• Sirius told Dumbledore that Daisy's Obscurus had erupted and that the Blood Curse had suppressed her rationality.
• Dumbledore asked Sean to soothe Nagini when the potion triggered her savagery, and Snape gave him a potion to protect his mind.
• Dumbledore explained that Snape's potion, Nagini's blood removal, the Mirror of Erised, and Ancient Magic runes would work together against the Blood Curse.
• Dumbledore levitated Nagini before the Mirror of Erised, where she saw a python and her human form.
• Dumbledore drew red-black blood from Nagini, and she began trembling wildly.

Dumbledore, Snape, and Sirius tried to lift Nagini’s Blood Curse with potions while Sean helped calm the violent emotions inside her. Nagini showed signs of recovery, but Sean absorbed her savagery and saw a disturbing reflection of himself in the Mirror of Erised.

• Sirius halted Nagini’s fading life force while Snape repeatedly fed her potions, drawing dark-red mist from her body into a crystal container.
• Nagini bit Snape during the final dose, but he treated the wound and drank an antidote as Nagini’s struggles weakened.
• Nagini flicked out her tongue, and Dumbledore flooded her body with clean blood before calling Sean to help her.
• Sean sensed Nagini’s sorrow and animal violence, soothed her savagery, and absorbed it into himself.
• Sean drank Snape’s potion to suppress the violence, then saw his blood-eyed, bloodstained reflection smiling in the Mirror of Erised.

Sean recovered after taking Snape’s Slowing Potion, and Dumbledore confirmed that Nagini’s Blood Curse had been lifted enough for her to return to human form. After Nagini was taken to the Hospital Wing, Sirius and Snape fought over their old falling-out, leaving Snape alone in the office.

• Sean regained his senses as Snape finished corking the Slowing Potion, and Sirius praised his reaction.
• Dumbledore explained that Nagini’s Blood Curse had been lifted, and Nagini transformed from a snake into a woman.
• Nagini recognized Dumbledore but became distressed when she realized many years had passed, so Dumbledore put her to sleep and McGonagall took her to the Hospital Wing.
• Sirius provoked Snape by mentioning Lily, James, and Daisy, and Snape struck him with a spell.
• Sirius and Snape exchanged spells before Sirius left, and Snape muttered, “Poisonous Mushroom—will never change its spots.”

After Snape forced Sean out of his office, Sean reflected on Daisy’s dangerous condition and woke from an unsettling dream to find Dumbledore waiting with urgent news. Daisy had suddenly worsened, and Dumbledore believed the Blood Curse’s animal savagery might have eroded her Obscurus.

• Snape accused Sean of learning secrets from Black, mocked his association with Potter, and ordered him out of the office.
• Sean returned to the Common Room and worried that Daisy’s Blood Curse and Obscurus made treating her especially dangerous.
• Sean woke before dawn from a dream of immense pressure and a clear full moon, then went to close an open window.
• Dumbledore arrived by Floo and told Sean that Daisy’s condition had suddenly worsened and that they had to act immediately.
• Dumbledore explained that the Blood Curse’s animal consciousness might have eroded Daisy’s Obscurus.

Dumbledore explained that his suppression of Daisy’s Obscurus had allowed it to merge with the Blood Curse and become dangerously feral, and revealed that Daisy’s suffering reminded him of his sister Ariana. He took Sean to a manor where the Potters, Longbottoms, and Moody had gathered to seek help for Daisy.

• Dumbledore told Sean that Daisy’s Obscurus had split, with one part attached to her consciousness and the other driven by the Blood Curse’s animal instincts.
• Dumbledore confessed that he felt responsible for Daisy’s suffering and spoke of his sister Ariana, whom he had also been unable to save.
• Dumbledore asked Sean to help him make amends, then took him by Apparition from Hogwarts to a manor outside the school.
• Sirius welcomed Sean at the manor, where James and Lily Potter, the Longbottoms, and Mad-Eye Moody had gathered.
• James and Lily thanked Sean as Lily worked at a potion station in the sitting room.

Sean joined Dumbledore and the Potters as they prepared to separate Daisy's Obscurus, and Moody warned that he could sense the Dark Arts around Sean. Sean met Daisy and began speaking with her about starting school, leaving her curious about whether she could choose her own House.

• James told Dumbledore that Daisy had stabilized after her latest outburst and that Harry was keeping her company.
• Moody warned Dumbledore that he would intervene if the plan failed or Daisy became a beast, and Dumbledore said everyone needed to prepare while Daisy was emotionally stable.
• Moody told Sean that he could sense the Dark Arts around him, but reassured him that the scent did not mean Riddle's soul had harmed him.
• Dumbledore sent Sean to meet Daisy, and Harry welcomed him upstairs.
• Sean greeted Daisy and offered to find an older girl to show her around Hogwarts, prompting Harry to insist that Potters belonged in Gryffindor.
• Daisy asked Sean whether she could choose her own House.

Sean reassured Daisy about attending Hogwarts and lifted her spirits by telling an embellished story about Dumbledore defeating Riddle. Daisy promised to cooperate with Dumbledore, and the group prepared to cast a protective barrier.

• Sean told Daisy he could help her influence her Hogwarts Sorting, but saved the method as a surprise for when she started school.
• Daisy worried her illness would keep her from Hogwarts and that she might hurt Harry, so Sean told her a dramatic version of Dumbledore's battle against Riddle.
• Daisy praised Harry for his bravery and promised Sean she would meet him on the Hogwarts Express.
• Dumbledore told Sean he had overheard the story and thanked him for helping Daisy feel hopeful.
• The others gathered in the corridor and cast Protego Horribilis, forming a transparent barrier.

Dumbledore began separating Daisy’s Blood Curse from her, but the procedure caused a violent struggle that injured the Potters and damaged the house. Sean reached Daisy’s room to soothe the Obscurus as Dumbledore held it away from her, and the chapter ended as its furious negative emotions surged toward him.

• Harry and Lily embraced before Dumbledore began the separation procedure, and Sean led Harry downstairs to wait.
• As the procedure stretched on, violent crashes came from upstairs, and James returned upstairs with a potion and gray-black scars on his hand.
• A short, fat wizard was thrown through the window, while Neville’s parents, Sirius, and Moody dealt with the turmoil upstairs.
• Sean found James unconscious, Lily healing him, and Daisy connected to a writhing Obscurus by a pulsing phantom thread.
• Dumbledore asked Sean to soothe the Obscurus while he separated it from Daisy, and Moody knocked back its first attack on Sean.
• Sean approached the Obscurus with a potion, and its feral instincts surged toward him as immense negative emotions.

Sean helped Dumbledore sever Daisy’s Obscurus, and the Aurors destroyed it while Daisy survived. After a day of celebration at the Potter home, Sean returned to Hogwarts, where Dumbledore gave him a small bag and said Snape wanted to see him.

• Sean drank Lily’s Slowing Potion, allowing Dumbledore to sever the Obscurus from Daisy.
• Moody and the Longbottoms destroyed the Obscurus, though an unnoticed flake of ash slipped into Sean’s robes.
• Dumbledore declared the mission accomplished, and Lily, James, and the others celebrated Daisy’s recovery with Sean.
• Sean woke and learned that Daisy would need medicine once a month for several years.
• The Potter family said goodbye to Sean, and Dumbledore took him back to Hogwarts.
• Dumbledore gave Sean a small bag and told him that Snape wanted to see him.

Sean received potions and other gifts from the Potter family, along with a phoenix feather and a warning from Dumbledore to trust Grindelwald cautiously. He then went to Snape’s office, where Snape questioned him about his final examinations.

• Sean examined the Potter family’s bag of potions, healing supplies, and a card granting him free Potter hair products.
• Dumbledore’s note explained that the phoenix feather could summon the Dumbledore family’s phoenix or serve as a wand core, and warned Sean to trust Grindelwald while guarding his secrets.
• Sean wondered what Dumbledore meant by warning him that people’s actions might not come from their own intentions, then headed back into the castle.
• Sean went to Snape’s office and noticed that the shelves and specimens had been tidied.
• Snape asked Sean how he expected to do on his final examinations, and Sean said they had gone all right.

Sean learned that Snape had awarded him an Outstanding grade in Potions despite his ruined Swelling Solution, then received Snape’s personal potions notebook. Back in his dormitory, Sean reflected on the notebook, Dumbledore’s Phoenix Feather, and the mystery surrounding Ariana.

• Snape told Sean that he had ruined his Swelling Solution by failing to cool it for long enough, but revealed that Sean had earned an Outstanding grade.
• Snape gave Sean his personal potions notebook and warned him to improve his brewing by second year.
• Sean told Snape that his friend’s younger sister was recovering, and Snape dismissed him from his office.
• After Sean left, Snape secured his office door, relaxed in his chair, and wrote an order for a velvet padded high-back chair.
• Sean returned to the dormitory and considered the value of Snape’s notebook and the Phoenix Feather Dumbledore had given him, along with the possibility that Ariana was trapped in a predicament related to phoenixes.

Sean discovered that an Obscurus had hidden inside his body and was drawn into his inner world, where another Obscurus attacked him. Elsewhere in that world, Giant Sean absorbed and crushed a scarlet Obscurus, while Sean’s growing fury led him to cast the Killing Curse.

• Dave warned Sean that a dangerous black substance was hiding inside him, and Sean recognized it as an Obscurus.
• Sean spotted the Obscurus in the center of his pupil and was transported to the floating island, where it attacked him.
• Sean found that his spells could blast the Obscurus apart but seemed only to make it more violent, while the island’s buildings resisted its attacks.
• Beneath the island, Giant Sean seized a scarlet Obscurus, absorbed its dark power, and crushed its core.
• On the island, Sean felt uncontrollable fury rise and coldly cast Avada Kedavra at the Obscurus.

Sean fought the Obscurus inside his Magic Power Source, using his surging violence to fuel repeated Killing Curses until only its core remained. Unable to destroy it, he absorbed a portion of its power and returned to his dormitory, where he learned he could summon a weaker version of that power in reality.

• Sean's uncontrollable violent thoughts drove him to cast Killing Curses that blasted apart the Obscurus's body.
• Sean used more Killing Curses to consume his violent emotions, then interrupted the Obscurus's attempts to recover with Stinging Hexes.
• The Obscurus stopped trying to revive, floated toward Sean, and vanished as its restrained power entered his body.
• Sean discovered he could draw on the Obscurus's power to create black gauze and unleash a forceful blast, though he could not yet control it freely.
• Sean returned to his dormitory and found that time had passed at roughly the same rate in both worlds.
• Sean summoned the Obscurus's weaker power in reality and realized he could enter his Magic Power Source by looking into his pupils in a mirror and activating its magic.

After stabilizing his unusual bond with the Obscurus, Sean took a calming potion and returned to Hogwarts life, where exam results and rumors stirred up attention. Sirius Black sent him an unreleased Nimbus 2001, which Roger Davies guarded in the Ravenclaw Common Room.

• Sean drank half a spoonful of Mind Purifier and slept soundly while the Obscurus remained quiet.
• Sean met Hermione, who admitted she was disappointed that her Potions result was not perfect despite earning Os in every other subject.
• Hermione placed first in the year and Sean came close behind, while Newmontgard students took the top place in every other year.
• A rumor spread that Hermione was Sean's girlfriend, and Hermione decided not to care because it annoyed the Newmontgard students.
• Sean received an unreleased Nimbus 2001 from Sirius Black, then let Roger Davies display and guard it in the Ravenclaw Common Room.