Chapter Summaries

Vizet explored the Merpeople’s shadow in the Black Lake’s Shadow World and formed a theory that magic drew marks from this realm. He discovered he could extract taming magic and summon a Phoenix Patronus there, leaving him eager to test his deductions further.

• Vizet moved to the Map Chamber and listed experiments he wanted to conduct in the Shadow World.
• Vizet entered the Shadow World and explored the area around the Merpeople, finding the shadows of Grindylows, Lobalugs, fish, and the Giant Squid.
• Vizet concluded that the Shadow World reflected real-world creatures and noticed that the Grindylow and Lobalug shadows were connected to the Merpeople shadow.
• Vizet realized he could extract the mark of the Merpeople’s taming magic and potentially use it to tame Grindylows and Lobalugs in the real world.
• Vizet cast the Patronus Charm and deduced that the Shadow World was where magic captured marks, though he still needed to verify his theory.

Vizet experimented with how the Patronus Charm and other soul-affecting magic changed the underwater creatures’ lights and shadows in the Shadow World. After casting an enhanced Happy Charm on the Merpeople lights and shadows, he was connected to them by a thread and pushed out of the Shadow World toward a familiar place.

• Vizet infused his Phoenix Patronus with Ancient Magic Power brewed over time, causing threadlike connections to emerge from the underwater creatures’ lights and shadows.
• Vizet severed the power sustaining the Patronus and found that its phantom remained connected to the Merpeople, Grindylow, and Lobalug lights and shadows.
• Vizet reasoned that the Patronus affected the Shadow World by influencing the creatures’ memories and decided to test other magic that could affect the soul.
• Vizet cast the Happy Charm on the Merpeople lights and shadows, making them dance and sing, then used Ancient Magic Power brewed over time to make them tremble.
• A thread emerged from the Merpeople lights and shadows, connected with Vizet, and pushed him out of the Shadow World toward a familiar place.

Vizet discovered that using Ancient Magic Power brewed by time had changed the Merpeople in the Black Lake, then developed theories about how collective human perceptions could become magic and shape magical beings and society. He planned to record and investigate his ideas by creating a Magical creature population in the Shadow World, though his unusually suitable experimental subject required more preparation.

• Vizet replenished the Happy Charm star cluster and learned that the charm now soothed the Black Lake Merpeople and lowered their wariness toward its caster.
• Vizet concluded that casting the Happy Charm on Merpeople light-shadows with Ancient Magic Power brewed by time had gradually changed the real Merpeople population.
• Vizet reasoned that wizards' shared perceptions of House-elves had become magic that reinforced their slave-like status, while Hermione's opposing views had helped make Dobby different.
• Vizet proposed that humanity's collective yearning to understand magic had formed the wizards, rather than wizards and Muggles arising from differences in human ability.
• Vizet decided to record and test his theory by creating a Magical creature population and observing it in the Shadow World, but he needed to prepare carefully for his special experimental subject.

Vizet discovered that Merpeople and Grindylows were attacking Durmstrang’s ship after the students provoked the Merpeople. He helped Dumbledore calm the Merpeople with a targeted Happy Charm, and they withdrew beneath the lake while Dumbledore planned to negotiate compensation.

• Vizet saw Grindylows trying to overturn Durmstrang’s Magical Ship while Merpeople attacked the students with stones, shells, and venom.
• Ernie McMillan told Vizet that Durmstrang students had tried to drive away Merpeople who surfaced to sing.
• Dumbledore approached the Merpeople to mediate, but they remained angry and pointed at the ship.
• Vizet suggested using the Happy Charm to calm the Merpeople, and Dumbledore recognized that Vizet had learned something through his exploration of magic.
• Dumbledore cast the Happy Charm, calming the Merpeople, who then led the underwater creatures beneath the surface.

Vizet told Dumbledore about his Shadow World research and discussed how magical environments, Ritual Magic, and wandmakers' choices might influence one another. Dumbledore accepted Vizet's conjectures as a source of inspiration and welcomed the chance to learn from him.

• Luna offered Dumbledore a guava-flavored fruit-juice jelly ball, which he tried and praised.
• On the way back to the castle, Vizet explained his Shadow World research, and Dumbledore compared one of his ideas to the principles of the Weather Charm.
• In Dumbledore's office, Vizet connected his Ritual Magic research to the different Wand Cores chosen by wandmakers in various Magical Worlds.
• Dumbledore concluded that wands, Wizards, and wandmakers influenced one another, and told Vizet he was willing to become a student again.

Vizet realized he could use Ritual Magic to counter the beliefs shaping the Black Lake merfolk and proposed creating a warm-water area to help them change. He finished a ritual design and considered Fawkes as its magical medium.

• Vizet connected his understanding of nature’s magic to the role a Wizard played in Ritual Magic.
• Vizet proposed that collective beliefs had shaped the differences between warm-water and cold-water merfolk, including their voices and appearances.
• Dumbledore told Vizet that Murcus, leader of the Black Lake merfolk, had described how Durmstrang students mocked their appearance.
• Vizet decided to use Ritual Magic to create a warm-water area for the merfolk and drafted a ritual featuring a phoenix statue as a totem.
• Dumbledore agreed that merfolk had their own artistic culture and suggested Fawkes as a suitable medium.

Vizet and Dumbledore visited Merfolk Village to persuade Murcus to support Vizet’s Ritual Magic plan. Vizet summoned his Phoenix Patronus, which astonished the merfolk and prompted Murcus to recognize it as the deity who had sheltered them in their dreams.

• Fawkes gave Vizet a feather, helping him refine his Ritual Magic plan to use the phoenix as a medium for the merfolk’s shared desire for beauty.
• Dumbledore brought Vizet to the bottom of the Black Lake, where a wary merperson escorted them to Merfolk Village.
• Dumbledore discussed Vizet’s plan with Murcus, but she remained unconvinced and their conversation reached an impasse.
• Vizet spoke to Murcus in Mermish and cast Expecto Patronum, revealing his silver Phoenix Patronus.
• Murcus and the gathered merfolk reacted with amazement, and Dumbledore explained that Murcus recognized the Patronus as the deity who had sheltered them in their dreams.

Vizet and Dumbledore asked the merfolk to help prepare a Ritual Magic, and Murcus’s village unanimously agreed after seeing Vizet’s Phoenix Patronus. The merfolk completed a phoenix statue by sunset, and Dumbledore sent a Phoenix Feather burning in water to land on it, beginning the next stage of the ritual.

• Dumbledore explained that the merfolk recognized Vizet’s Phoenix Patronus as the god who had sheltered them in their dreams.
• Murcus gathered the merfolk, who unanimously agreed to let Dumbledore and Vizet intervene and prepare the Ritual Magic.
• Murcus said the merfolk would finish carving their phoenix statue by sunset, and the whole village worked together to complete it.
• Vizet explored the village and sensed the merfolk’s united will accelerating the carving.
• Dumbledore placed a Phoenix Feather inside a cluster of flames that burned underwater, and the flames drifted onto the completed statue.

Vizet observed the Phoenix Statue’s Ritual Magic changing the Merfolk Village and traced how the merfolk’s belief, songs, and desire for beauty could create a cycle that reshaped their traits. He concluded that the Black Lake merfolk could become a unique cold-water clan with the characteristics of warm-water merfolk.

• A Phoenix Feather activated the Phoenix Statue, brightening the Merfolk Village and prompting the merfolk to dance and sing.
• Vizet used the Myriad Image Snatching Mark to enter the Shadow World and observed the Phoenix phantom guiding changes in the village’s plants and creatures.
• Vizet found that the red influence around the Merfolk Village and the surrounding Black Lake maintained a balance, which reminded him of the Forbidden Forest’s multiple ecosystems.
• Vizet reasoned that Ritual Magic could turn the merfolk’s yearning for beauty into a new consensus, gradually overcoming the belief that cold-water merfolk should look like sea monsters.
• Vizet concluded that the merfolk’s faith in the Phoenix Statue and the resulting changes could reinforce each other, transforming the clan into cold-water merfolk with warm-water traits.

Vizet returned from the Shadow World and learned that Murcus was choosing carved gifts for him and Dumbledore. After Vizet left, Kamba Headmaster told Dumbledore that Vizet had changed Hogwarts students through an elusive magic shaped by collective belief, and asked for his help explaining it to Vizet.

• Vizet watched the Merpeople gather carved ores and shells, and Dumbledore explained that Murcus was selecting gifts for them.
• Dumbledore accepted an ore carving on Fawkes's behalf after returning to the Headmaster's Office.
• Kamba Headmaster visited Dumbledore and remarked that Hogwarts students' magical abilities had risen compared with those of students from other schools.
• Kamba Headmaster explained that Uagadou's Animagus and Gesture Casting traditions drew strength from an elusive magic resembling Ma'at or the Otherworld.
• Kamba Headmaster said Vizet had triggered a similar effect at Hogwarts and asked Dumbledore to help him explain the unstudied magic to Vizet.

Dumbledore and Headmaster Kamba discussed how Vizet’s magical discoveries could expose wizards to Muggles and the need to prepare the magical world. At Hogwarts, Professor McGonagall announced that the Five Champions Tournament would retain the traditional Christmas Ball.

• Headmaster Kamba explained that Vizet was chosen because he had broken magical rules and made unprecedented discoveries.
• Dumbledore and Headmaster Kamba considered how Muggle beliefs might threaten wizards if magic exposed their world, and agreed that wizards needed to understand Muggle development.
• During Transfiguration, Harry and Ron fenced with their wands while Neville read about making a longsword, and Professor McGonagall transformed the boys’ wands into objects that left Ron the winner.
• Professor McGonagall announced that the Five Champions Tournament would include a Christmas Ball, exciting the students.
• Michael Corner celebrated the chance to wear Dress Robes, while Anthony Goldstein asked whether he would still travel to Greece to see Merpeople.

Professor McGonagall announced the Christmas Ball, its rules, and the Champions’ duty to open it with dance partners. Harry worried that he would have to dance, while Vizet later told Michael about the tradition on the way to Care of Magical Creatures.

• The students reacted excitedly to the Christmas Ball announcement, and Vizet considered how the crowd’s shared mood might relate to his research into “Consensus” Magic.
• Professor McGonagall demonstrated a transformation spell, then explained that students could invite partners from any school and that the ball would take place in the Great Hall on Christmas evening.
• Professor McGonagall warned the students to behave well around their guests, then asked Harry and Vizet to stay behind after class.
• Professor McGonagall told Harry and Vizet that the Triwizard Champions had to attend with dance partners and open the ball; Harry was dismayed to learn he would need to dance.
• Vizet told Michael that Champions had to open the ball with partners, and Michael regretted that he had not been chosen as a Champion.

Fleur Delacour invited Vizet to the Christmas Ball, but he declined because he already wanted to invite someone else and explained that Champions were expected to find dance partners. They shifted to discussing Alchemy and Charms, and Vizet demonstrated a tangible Shield Charm based on a snowball.

• Michael Corner tried to prepare himself to invite Fleur Delacour to the Christmas Ball, but she rejected him before he could ask.
• Fleur Delacour invited Vizet to attend the Christmas Ball with her, and Vizet declined because he already had someone he wanted to invite.
• Vizet explained that Champions were expected to find dance partners and suggested the tradition encouraged more students to join in.
• Fleur Delacour asked Vizet about the Alchemy paper, and he described how its ideas had inspired him to experiment with the Shield Charm.
• Vizet used a snowball as the basis for a tangible Shield Charm, then demonstrated that the rough shield was easily pierced.

During Care of Magical Creatures, Vizet grew anxious about inviting Luna to the Christmas Ball and finally went to find her after class. Luna met him behind the Greenhouse, where his attempt to speak left them both flustered.

• Hagrid taught the students to soothe Fire Salamanders and draw their blood, while Vizet politely refused a Hufflepuff girl's invitation to the Christmas Ball.
• Vizet's dormmates asked whether he planned to invite Luna, and he admitted that he did.
• Vizet repeatedly rehearsed how to ask Luna to the ball during class, growing more anxious after Michael explained its significance.
• After class, Vizet transformed from a Phoenix outside the Greenhouse and waited for Luna to finish Herbology.
• Luna found Vizet behind the Greenhouse, took his hand in her pocket, and blushed when he said he was Dirigible Plums waiting for the full moon.

Vizet and Luna walked through the snowy grounds of Hogwarts, warmed each other’s hands, and asked one another to be dance partners. They agreed to stay at school for Christmas, and Vizet hinted that he had an idea for Luna’s dress robe.

• Vizet and Luna walked toward the rear garden hand in hand, with Luna teasing him about how cold her hands were.
• In the rear garden, Vizet warmed Luna’s hands, and they confessed at the same time that they wanted each other as dance partners.
• Vizet suggested going to Hogsmeade for a dress robe and said they would tell Mr. Lovegood they were staying at school for Christmas.
• Luna said she would write to her father, and Vizet hinted he had a better idea than buying a robe at Gladrags Wizardwear.
• Sprout interrupted them, pretended she had not seen them, and walked toward the marble archway.

As Hogwarts students scrambled to find partners for the Christmas Ball, Vizet revealed that he had used a Confundus Charm to discourage invitations after choosing Luna. Fred and George proposed playing music to help other students ask people to the ball, and Fred successfully invited Angelina Johnson.

• Anthony Goldstein learned that Lini already had a partner, while Michael Corner admitted he had heard about it from Zacharias Smith.
• Katie Bell searched for Vizet, and Michael tried to invite her to the ball after learning Vizet had already asked Luna.
• Vizet told Michael and Anthony that he had used a Confundus Charm to avoid the many invitations, including repeated visits from Madam Pince.
• Harry asked Vizet how he had invited Luna, and Vizet explained that he had asked her alone.
• Fred and George offered to accompany students with music as they invited partners, and Fred asked Angelina Johnson to the ball.
• Angelina accepted Fred’s invitation.

Fred and George promoted their ukulele matchmaking service as students paired up for the Christmas Ball but realized they did not know how to dance. Vizet and Luna attended a dance lesson led by Professors McGonagall and Sprout, where the professors prepared to demonstrate.

• Angelina Johnson agreed to attend the Christmas Ball with Fred, and Fred and George offered boys ukulele-backed help finding dance partners for three Gold Galleons.
• Fred and George's matchmaking service and other students' efforts helped more students form dance pairs as Christmas approached.
• After students realized they did not know how to dance, a notice announced a dance lesson in an Empty Classroom.
• Vizet explained that his attempts to improve the Dance Step Charm with 'Consensus' Magic had limitations, including requiring a full moon for Dirigible Plum dance steps.
• Vizet and Luna arrived at the lesson, where Professors McGonagall and Sprout welcomed students and prepared to demonstrate dancing.

At the Hogwarts dance lesson, Vizet and Luna sat close together while Professor McGonagall and Professor Sprout demonstrated the steps. Luna offered to teach Vizet after he admitted he had not learned them, and the lesson ended with the professors praising the students' progress.

• Professor McGonagall played music and taught the students the basic dance steps.
• Professor McGonagall and Professor Sprout demonstrated the partner dance while Vizet and Luna sat close together.
• Luna asked Vizet whether he had learned the dance, and he admitted he had been distracted.
• Luna offered to teach Vizet, and he accepted her help.
• Professor McGonagall and Professor Sprout guided several student pairs before ending the lesson and praising their progress.

As the Christmas Holiday approached, the students became distracted by the Christmas Ball and their plans, while Snape warned them to keep working on antidotes. Professor Flitwick told Vizet that he was ready to learn a safer, more advanced way to expand a space, leaving Vizet eager to hear how Newt Scamander’s suitcase worked.

• Snape warned the students that he might give an unlucky antidote student a special Christmas Gift, while Professor Sprout had her class make sachets and Professor McGonagall assigned holiday homework.
• Moody caught Michael Corner daydreaming about his Beauxbatons dance partner and chased him with a Hundreds of Missiles Charm during practical training.
• Septima Vector taught her Arithmancy students a form of divination, and Michael concluded he needed to avoid wood because Moody had a wooden leg.
• Luna told Vizet that Hagrid’s class cared for Augureys and learned to pluck their colorful feathers, while Professor Flitwick entertained his students with a Paper Airplane Summoning game.
• Professor Flitwick praised Vizet’s Weather Charm and explained that he could teach him a safer pocket-expanding spell associated with Newt Scamander’s suitcase.

Professor Flitwick taught Vizet the Harmonious Space Charm, which used music to connect the soul and magic and create a space from memories. Vizet deduced that shared musical understanding could make the space more stable than one formed with the Undetectable Extension Charm, and Flitwick encouraged him to explore the idea further.

• Vizet identified the magic in Mr. Scamander's suitcase, and Professor Flitwick began explaining the related charm.
• Flitwick explained that the Harmonious Space Charm, cast with “Spiritual Resonance Symphony (Symphonia Anima),” used music, emotion, memories, and magic to create a space.
• Vizet connected the charm to Ritual Magic and discussed how different magical methods could achieve the same effect.
• Vizet reasoned that shared understanding of music could help stabilize the charm's space, and Flitwick said he had not considered that advantage.
• Flitwick suggested Vizet use the Christmas Ball to experience the music, and Vizet agreed.