Chapter Summaries

Regulus taught Lily a systematic way to organize research for her Potions Essay, then confronted Snape over his possessive behavior toward her. He borrowed Astral Meditation and left the Library as evening fell.

• Regulus showed Lily how to collect, categorize, and connect sources for her essay, and Lily agreed not to reveal that he taught her.
• Lily and Regulus parted warmly, with Lily saying they might have become good friends if they were in the same House.
• Snape emerged from the bookshelves and ordered Regulus to stay away from Lily, but Regulus challenged his jealousy and warned him not to control her friendships.
• Regulus left Snape in the Library and borrowed Astral Meditation from Madam Pince.
• Regulus left the Library after torches had been lit in the Castle corridors.

Regulus investigated Professor Binns’s ghostly magic and tried to glimpse a forbidden book about soul magic, then adapted a star meditation technique using a model of Orion. His new method stabilized his magic cycle and slightly improved his recovery speed.

• Regulus observed Professor Binns’s nearly imperceptible magic and wondered how a soul’s magic changed after death and whether Voldemort’s soul-splitting related to immortality.
• Regulus approached the Forbidden Section and spotted A Brief History of Soul Magic, but his magic was repelled and Madam Pince ordered him away.
• Regulus attempted Astral Meditation’s Orion exercise and failed to sense the constellation’s supposed pulse.
• Regulus constructed a precise Orion model in his mind and incorporated its geometry into his Magic Guidance Cycle.
• Regulus found that the meditation had stabilized his cycle and slightly increased his Magic Recovery Speed.

During Herbology, Regulus sensed that Gillyweed experienced a primitive pain response when its pus was collected, prompting Professor Sprout to teach the class to handle Magical Plants gently. He then questioned her about the fatal Magic Power in a Mandrake’s cry and left considering whether it could be adapted to heal mental trauma.

• Regulus used Magic Perception to detect pain-like fluctuations in Gillyweed as he squeezed out its pus.
• Professor Sprout confirmed that Gillyweed secretion was a burden and demonstrated a gentler method, awarding Slytherin ten points for Regulus’s observation.
• Regulus asked Professor Sprout whether a mature Mandrake’s cry killed through physical harm or mental harm.
• Professor Sprout explained that the cry’s Magic Power destabilized the listener’s soul and triggered a fatal bodily collapse, while Protective Earmuffs filtered out its dangerous component.
• Regulus asked whether the destructive Magic Power in Mandrake’s cry could be adjusted to repair mental trauma.

Regulus explored how sound magic and Mandrake cries could affect minds and bodies, then learned from Professor Sprout about the risks of perceiving dark plants. After successfully transferring a small amount of Magic Power between daisies, he began planning how to study and potentially guide the dangerous Magic Power of Mandrakes.

• Professor Sprout explained that sound-based magic was difficult to control and that Mandrake cries were dangerous, while Regulus considered their potential for killing and treatment.
• Sprout warned Regulus that dark plants could harm those who perceived their emotions and offered him a chance to assist with Plant Magic research after his OWL exam.
• Regulus used his Magic Perception to compare two daisies and guided Magic Power from a healthy plant into a damaged one, restoring a small strip of a yellowed leaf.
• Regulus concluded that Plant Magic Power could be transferred between individuals and began considering whether he could guide the destructive Magic Power of Mandrakes.
• Regulus planned to study Mandrake seedlings and investigate their Magic Power as they grew.

Regulus met Eleanor Bones in the Greenhouse area and exchanged Herbology advice with her before going to dinner. That night, he discovered Hermes Mulciber was secretly searching Hogwarts for something and resolved to keep watching him.

• Regulus advised Eleanor Bones on caring for a Dittany plant, and they exchanged Herbology techniques and soil-detection spells.
• Regulus and Eleanor walked to the Great Hall, where Avery asked what they had discussed and Regulus said it was Herbology.
• Regulus woke after midnight, saw Hermes leave the dormitory, and used Magic Perception to inspect a map in Hermes's schoolbag.
• Regulus found the map marked several Hogwarts locations, including a suspected entrance beneath the Astronomy Tower.
• Hermes returned with scorch marks on his robe and a cut on his hand, and Regulus decided to keep watching him.

During Astronomy class, Regulus observed Orion’s Belt and realized that the stars’ subtle movement might be incorporated into his meditation. That night, he synchronized his magic circulation with a dynamic stellar model, creating Star-track Guidance Meditation and strengthening his body, mind, and Magic Power together.

• Professor Sinistra taught the students to locate Sirius, and Regulus explained to Alex Roxier how Astronomy related to advanced magic.
• Regulus observed faint streams of Magic Power connecting the stars of Orion’s Belt and calculated their positions and movement.
• After class, Regulus decided to incorporate the stars’ motion into his meditation.
• That night, Regulus synchronized his Magic Power cycle with his mental model of Orion’s Belt, improving his physical strength, concentration, and control of Magic Power.
• Regulus named the integrated practice Star-track Guidance Meditation and established a new foundation for his training.

Slytherin’s first-years took part in the traditional welcoming duels, where Regulus stood out as calm and capable while Hermes requested to face him. After the other matches ended, Regulus and Hermes were the last two left to duel.

• Narcissa ordered all Slytherins to return to the Common Room for the welcoming program, and Lucretius explained that first-years would duel in pairs.
• The first-years gathered around Regulus, whom many regarded as a reliable ally, while the older students placed bets on the duels.
• Hermes asked to duel Regulus, and Regulus agreed to face him after the other matches.
• Alex lost his match after stumbling, while Avery defeated a half-blood girl with a Slowing Charm and a Disarming Charm.
• The first-years completed their matches until only Regulus and Hermes remained standing in the center of the Common Room.

Regulus Black defeated Hermes Mulciber in a duel after calmly blocking his spells, including an incomplete Dark Arts curse, and disarming him. Lucretius named Regulus the Head of New Students, while the other first-years backed down.

• Regulus deflected Hermes’s attacks without leaving his spot, while Hermes grew frustrated by the effortless defense.
• Hermes cast the Dark Arts spell Blood Boil, but Regulus stopped it with a silver barrier and disarmed him with Expelliarmus.
• Regulus returned Hermes’s wand and criticized the instability of his spell, telling him to commit if he intended to kill.
• Alex Rosier lowered his head, Avery Cuthbert recognized the gap between himself and Regulus, and Hermes retreated into the crowd.
• Lucretius asked whether anyone else wished to challenge Regulus or Hermes, but the new students declined.
• Lucretius declared Regulus Black the Head of New Students.

Narcissa gives Regulus a letter from Bellatrix warning that Voldemort has noticed him and expects him to prove his loyalty. After realizing the threat is closer than he thought, Regulus faces a fresh provocation from Alger Travers in the Slytherin common room.

• Narcissa tells Regulus that Voldemort’s influence is spreading through the Ministry, the Wizengamot, Hogwarts, and Pure-blood families, then gives him Bellatrix’s sealed letter.
• Regulus reads Bellatrix’s demand that he grow stronger and serve Voldemort, along with her warning that the Dark Lord is already interested in him.
• Regulus recognizes that Voldemort may soon test him and realizes he has less time to prepare than he expected.
• Alger Travers taunts Regulus in the common room, questioning his position as Slytherin Chief and provoking him in front of the other students.

Regulus exposed Travers’s attempt to provoke him, then decisively defeated and humiliated the fifth-year in a duel. He left the Slytherin common room as the students looked on in shock, while his deeper unease remained.

• Regulus called out Travers’s plan to make him attack first and challenged him to draw his wand.
• Travers attacked with a Stunning Spell and a fire serpent, but Regulus blocked and extinguished both spells.
• Regulus chained curses that sent Travers flying into mud, then transformed an armchair into a serpent that bound and dragged him around the common room.
• Regulus released the gasping Travers and walked toward the dormitory, leaving the assembled students stunned.
• Hermes silently slipped back into the shadows as Regulus’s reputation among the Slytherins began to change.

Regulus successfully added Betelgeuse to his Star-track Guidance Meditation, forming a preliminary Four-Star Dynamic Model, then saw his standing rise after defeating Alger Travers. The chapter leaves him on his way to Professor Slughorn’s office.

• Regulus spent nearly two hours integrating Betelgeuse with Orion’s Belt and established a preliminary Four-Star Dynamic Model.
• Regulus recognized that expanding the model would demand increasing effort and that solidifying its perpetual motion remained a major challenge.
• News of Regulus defeating fifth-year Alger Travers spread through Slytherin and the pure-blood circle, prompting students to reassess him.
• Slytherin students wrote home about Regulus’s power, and a seventh-year student told him Professor Slughorn wanted to see him.
• Regulus headed to the Underground Classroom to visit Professor Slughorn’s office.

Regulus gained Slughorn's help exploring potion-based rune materials and received sharply different letters from his parents about his future. At Gryffindor, James planned to confront Regulus, while Sirius's unease and curiosity kept him from stopping the plan.

• Slughorn praised Regulus and offered his connections, then agreed to research safe potion carriers for runes with him.
• Regulus received Walburga's fervent letter urging him to serve Voldemort's cause and Orion's cautious letter granting access to more library shelves.
• Sirius worried that Regulus's growing reputation would draw The Dark Lord's attention and pull him toward the Death Eaters.
• James told Sirius that he, Remus, and Peter would ambush Regulus, and Sirius ultimately let the plan stand.

Regulus Black defeated James Potter, Remus Lupin, and Peter Pettigrew after they blocked his way, then warned James not to provoke him again. Regulus left for the Library with Lily Evans, while James resolved to regain his dignity with a better plan.

• Regulus sensed that Remus Lupin was a Werewolf but decided not to reveal his secret.
• James Potter attacked Regulus with two spells, but Regulus blocked them and quickly disarmed James, petrified Lupin, and bound Peter Pettigrew.
• Regulus warned James that another provocation would be his last, then invited Lily Evans to the Library and left with her.
• Remus helped James up, and James decided he would need a more thorough plan or a better opportunity before confronting Regulus again.

In the Library, Regulus explained his approach to dueling and discussed the rise of pure-blood supremacy with Lily, who questioned whether he supported it. He later studied advanced potion-carrier and rune research, and considered whether Lily might assist him without revealing his true purpose.

• Lily asked Regulus how he made ordinary spells so effective, and he described understanding, practice, physical ability, and awareness as the foundations of dueling.
• Regulus told Lily that pure-blood inheritance could offer early access to knowledge, but personal effort mattered more than blood status alone.
• Lily asked about the strange atmosphere at Hogwarts, and Regulus explained that a powerful pure-blood supremacist was gaining support among Ancient Families.
• Regulus acknowledged that his Black bloodline granted him advantages, but criticized the use of ancestry to justify rule and preserve existing interests.
• Regulus returned to research on potion carriers, Magic Power matrices, and rune media, while Lily asked what he was studying.
• Regulus considered Lily as a possible assistant but kept his real purpose secret.

Regulus recruited Lily as a collaborator on topical potion research, then perfected an improved Disillusionment Charm to enter the Forbidden Section undetected. There, he read A Brief History of Soul Magic and learned about Horcruxes, soul damage, and the importance of soul stability.

• Lily eagerly agreed to help Regulus research topical potions, and promised to keep his confidences.
• Regulus practiced the Disillusionment Charm and developed an improved version that also concealed his heat and magical presence.
• Regulus used the charm to evade portraits and Filch and enter the Forbidden Section.
• Regulus read A Brief History of Soul Magic through Magic Perception without removing it from its shelf.
• Regulus learned that Horcruxes split and corrupt the soul, and concluded that soul stability might help someone withstand the Dark Arts.

After making rapid progress through Star-track Guidance Meditation, Regulus strengthened his ties with Avery Cuthbert by laying out expectations for their relationship and advising him to value useful allies. He also assessed Hermes Mulciber as a potentially useful but dangerous associate, while Avery began reconsidering his contempt for Alex Rosier.

• Regulus woke refreshed after Star-track Guidance Meditation and reflected that his early rapid growth would eventually slow.
• Avery told Regulus that his father wanted him to maintain a good relationship with the Black heir because of Regulus's strength and the changing Ministry atmosphere.
• Regulus agreed to be companions with Avery, but urged him to build pride through personal strength, think ahead, and observe basic limits.
• Avery raised concerns about Hermes Mulciber's nighttime absences and strange behavior, and Regulus advised respecting his privacy while keeping a watchful distance.
• Avery disparaged Alex Rosier, so Regulus pointed out Alex's strengths and family connections, prompting Avery to reconsider the value of keeping him close.

Regulus asked Professor McGonagall whether Graphite and Diamond could be transformed into one another despite their radically different structures. After discussing the challenge, McGonagall demonstrated her mastery by effortlessly turning Graphite into a Diamond.

• Regulus transformed a beetle into a perfect black button in Transfiguration class and earned five points for Slytherin.
• Professor McGonagall praised Regulus's talent and invited him to bring her carefully considered questions grounded in his studies.
• Regulus visited McGonagall's office and asked how Transfiguration could change Graphite into Diamond or Diamond into Graphite.
• McGonagall explained that Diamond's dense, orderly structure differed from Graphite's loose, layered arrangement, then praised Regulus's insight about rewriting a substance's internal structure.
• McGonagall used her wand to transform Regulus's Graphite into a clear crystal and then polished it into a small Diamond.

Professor McGonagall gave Regulus her old notebook on advanced Transfiguration, then warned Dumbledore about his unusual talent, secret practice, and careful influence over others. Dumbledore agreed to keep observing Regulus as the wizarding world faced Voldemort’s growing shadow.

• Professor McGonagall explained the limits of Transfiguration and the Philosopher’s Stone, and Regulus gained new insight into the subject.
• Professor McGonagall gave Regulus her notebook of reflections on advanced Transfiguration and urged him to guide his will with wisdom and morality.
• After Regulus left, Professor McGonagall went to Dumbledore and described his exceptional ability, secluded magical practice, friendship with Lily Evans, and influence over Avery Cuthbert.
• Dumbledore said he had been watching Regulus since the Sorting Hat reported that the boy had chosen Slytherin while gazing toward the Starry sky.
• Dumbledore told Professor McGonagall to teach and observe Regulus, intervening if necessary to keep him and others safe.

Regulus studied McGonagall’s insights on Transfiguration and practiced changing Graphite’s molecular structure, while considering how precise transformations of substances in the air could harm people. His roommates quietly adjusted to the changed Dormitory atmosphere, but Hermes returned still confident that his family’s Dark Arts could give him a chance to kill Regulus.

• Regulus read McGonagall’s notes and concluded that transforming one pure substance into another was harder than changing complex compounds because it required restructuring matter at a microscopic level.
• Regulus practiced altering Graphite’s internal structure and reasoned that Transfiguration’s limits might be extended by understanding matter’s principles and essence.
• Regulus considered transforming Oxygen in the air into Ozone or other substances, imagining ways precise elemental changes could affect a person’s breathing.
• Avery Cuthbert and Alex Rosier returned to the Dormitory and stayed quiet while Regulus practiced, and Alex felt the atmosphere among the roommates had become less oppressive.
• Hermes Mulciber returned and privately recalled several family Dark Arts, believing they could help him kill Regulus in an unrestricted fight.

Regulus demonstrated the deadly potential of Transfiguration by making the air around Hermes unbreathable, then released him and returned to his experiments. He concluded that manipulating substances in the environment offered a promising avenue for further attacks.

• Hermes mocked Regulus's Transfiguration practice as impractical, and Regulus challenged his narrow view of power.
• Regulus used Non-directional Transfiguration to make the surrounding gases unbreathable, leaving Hermes unable to breathe or cast a spell.
• After Hermes began to lose consciousness, Regulus withdrew his Magic Power and let him gasp for air.
• Regulus asked Hermes what he thought of Transfiguration, while Hermes and the other roommates reconsidered Regulus's power.
• Regulus returned to his desk and considered how he could take his experiments with environmental substances further.