"You see, in a brightly lit classroom, it's completely different from dealing with Dementors."

Harry was repeating the phrase as he walked between each of his classmates as a brilliant silver stag followed him with a brisk step.

Only Harry was able to teach anyone else in this lesson, because Diggory was not very skilled in the Patronus Charm, and as long as someone could show a tangible silver Patronus, everyone would look at it with envy and try harder.

"Don't be so upset, Harry." Zhang Qiu waved his wand, and Harry was about to talk to her, but Zhang Qiu had already turned his head to talk to Diggory, "Cedric, did I succeed just now? I think I see something with wings?"

Harry sullenly walked to the other side to check on the other classmates' practice, Fred and George snickered as they peeked,

Harry came to a group of people who had stopped practicing and were surrounding Hermione, who looked enviously at a shiny silver otter, Hermione's Patronus, playing around her, causing a burst of admiration,

"Patronus isn't meant to be pretty," Harry said impatiently, sulking a little as he looked at the people who had scattered and obediently went about practicing, "I think we need a Boggart, that's how I learned the spell, and when it turns into a Dementor, I'll have to focus and summon my Patronus out."

"That would be terrible," Gryffindor student, Lavender. Brown complained, her wand shooting a puff of silver smoke, and her multiple failures made her unhappy.

On the other side, Neville's expression was slightly distorted, his face crumpled from focused recollection, but the spell clearly didn't reward him for his efforts.

"You have to think of something happy." Harry reminded,

"I'm trying," Neville said hard, large beads of sweat sliding down his round face, "but—"

"It doesn't have to be a real memory, Neville," Lawrence advises, "just like when you face a Boggart, it's important to imagine anything that will make you happy." (Note 1)

"I've been trying, but it's—it's so hard." Neville said sadly, and there was a burst of exclamations from the crowd on the other side, apparently someone had succeeded again,

The door to the Room of Requirement was pushed open and closed again, Harry turned his head, but he didn't see anyone, the people who approached the door fell silent, and the crowd silently moved out of the way,

It was Dobby, the house-elf, who Lawrence had seen at the end of the fourth year, and knew that he had left the Malfoys because of Harry's relationship and came to Hogwarts to become one of the many house-elves.

Dobby was wearing several beanies and sweaters, and it was obvious that Hermione's efforts in the past few months had all been on Dobby,

"Hey, Dobby," Harry was visibly taken aback by Dobby's arrival, "why did you get here—what happened?"

Dobby's big eyes revealed fear, the uneasiness spread, everyone in the room fell silent, the silver patronus turned back to silver mist one by one, the room turned dark, Dobby's whole body trembled, but he still spoke bravely, warning everyone with a sharp voice,

"She's coming, Harry Potter, sir—" said Dobby, "all the house-elves have been warned not to speak, but, sir—Dobby is here to warn you—"

Dobby tried to hit his head against the wall in the middle of his sentence, but Harry played his role as a Quidditch Seeker and quickly stopped Dobby from harming himself, and Dobby continued intermittently to the sympathetic screams of several girls,

"She's coming, sir," Dobby's eyes widened, "she—"

"Who? You're talking about her?" Harry's stunned question, Lawrence and the twin brothers glanced at each other, and they separated from the crowd and walked towards the center of the crowd where Harry and Dobby were.

"Umbridge is here, isn't it?" Lawrence asked, and in the dead silence, Dobby screamed, and despite Harry's grip on his hand, Dobby still kicked the floor with his feet, punishing himself with pain,

"Yes, gentlemen," Dobby struggled to break free of Harry's hand and began to strike his fist indiscriminately against his eye sockets, "she's coming."

"She has helpers, does she?" Lawrence asked, and Dobby temporarily stopped beating himself, nodded visibly, and then fell to his knees and began to bang his head on the floor,

Harry stopped Dobby again and took a deep breath, and just as he asked everyone to run, Fred and George pressed Harry's shoulders left and right,

"Take it easy, brother." Fred said,

"We've been preparing for a while." George told him,

"We should have noticed what was going to happen today." Lawrence said that the crowd followed his gaze past the Ravenclaw students who were chatting restlessly, and finally stopped at Zhang Qiu and Diggory, and more and more people noticed that no one had come to the rally today.

"Start withdrawing from the small number of colleges," Lawrence continued, "Fred, George?"

"Ravenclaw and me," Fred beckoned immediately, "By the way, does anyone know the Illusion Charm?" Wow—"

"Hufflepuff's come with me," George shouted, "Diggory will you use it?" It's getting better."

"Don't be too afraid to make a noise," Lawrence said quietly, everyone calming down because of their arrangement, "Fred and George will help you get rid of your pursuers."

"Gryffindor-Ginny, I know you've heard a lot from Fred and George about the school," Lawrence said hurriedly, "you leave with the girls, and follow Ravenclaw at first, Fred will try to help you as much as possible, and when you don't go the other way, my suggestion is that it would be safer to take a short detour back to the saloon."

After seeing Ginny nod, Lawrence began to wave his wand and cast the Transfiguration Charm,

"Angelina, Hermione, the work of unraveling the spell will be up to you." Lawrence explained to Hermione, whose face was a little pale, and Angelina nodded seriously,

The Ravenclaw and Hufflepuff students had already rushed out of the Room of Need, and the Gryffindor girls were following closely behind.

"There are eight other people besides me," Lawrence looked at the rest, "Lee, are you okay?"

"What do you want to do?" Plum. Jordan looked geared up, "Are we going to fight Umbridge?"

"Your sense of humor has regressed, Lee," Lawrence said with a laugh, "and we were the last to go, and besides the pursuers behind us, there were enemies from other routes who had returned in vain."

"It's a little hard, Lawrence." Plum. Jordan was a little unconfident,

"Then we'll divide into small groups." Lawrence said quickly, "You're taking Brother Creevey with you, okay?"

Plum. Jordan nodded confidently, and Lawrence waved his wand to help them stealth, Lee. Jordan left with the somewhat trembling Creevey brothers,

"Harry," Lawrence said to Harry, who had already sent Dobby away, "it's okay to leave the rest to you, right?"

"I'll do my best, but, Lawrence," Harry was a little skeptical, "won't you come with us?"

"That's how it was intended, Harry," Lawrence laughed, and then helped the remaining five Gryffindor fifth-graders cast the Illusion Charm before continuing, "Didn't you notice that the list on the wall was gone?"

A series of suffocating inhales, and although no one could be seen, Lawrence guessed that everyone turned their eyes to the list that had been nailed to the wall,

"Let's go," Lawrence turned to the corner of the bookcase, and quickly approached there,

"When did you find out?" After Selwyn's figure appeared from there, Lawrence also stopped, and several Gryffindors didn't dare to stay any longer, and hurriedly left the Room of Requirement.

"You came in with Dobby, didn't you?"

"Why don't you demolish me?"

"I'm afraid that if we do this, we won't be able to leave alone."

"I'm not that good, didn't Potter just leave?"

Lawrence did not speak, he cautiously stretched out his left hand, as if to snatch food from the mouth of the fire dragon, and Selwyn peeked out of the sleeve of his robe, revealing a corner of the parchment,

"I think that's what you want?" A smile tugged at the corner of Selwyn's mouth, and she had to admit that she did look good when she smiled, but she couldn't feel any warmth from her smile, "I found you weren't on this list."

"Obviously." Lawrence replied, his left foot quietly moved a small step forward, he was a little anxious, if the students who did not attend the party today did tell Umbridge, then soon, this room would be discovered, and searched,

"I'm confused, I think you heard my warning," Selwyn asked, then tilted his head as if to glance at the doorway of the Room of Requirement, "but you're just passively waiting for things to happen?"

"We can only be ready," Lawrence replied, "Harry is the founder, and since Harry doesn't want to suspect anyone who wants to go to the party, what we should do is let everyone out safely when the worst happens."

"But apparently you missed this?" Selwyn tucked the parchment back into his sleeve,

"I think I still have a chance to make amends?" Lawrence thought for a moment and asked, "Can you trade?"

"It's unfortunate that what I want isn't with you this time." Selwyn replied regretfully,

Upon hearing this answer, Lawrence raised his hands and beckoned to the bookcases on either side, and the heavy Defence Against the Dark Arts reference books flew up one by one, turning into eagles, first to the ceiling, and then to swooping down, their sharp beaks and claws shining,

Selwyn calmly raised his wand and tapped on the vacated bookcase, which fell towards Selwyn and turned into a bush of thorns, and sharp thorns flew out, piercing the eagles one by one, turning them back into broken books.

Lawrence took out his wand this time, and a bright flame streaked through the air, and just as the flame was about to fall on the thorn bush, Lawrence's shoulder was grabbed by a strong hand, and the trace of flame disappeared in an instant.

The trail of the flames, leaving only a faint streamer in Lawrence and Selwyn's eyes, proved that it had existed, Lawrence turned his head, and he saw Professor Dumbledore's old face, and the eyes that sparkled behind his glasses,

"You've done a good job, Lawrence." Professor Dumbledore smiled, as if the flame just now was not extinguished by him, Phoenix Fawkes rarely did not stay in the Headmaster's office, but stood on Professor Dumbledore's shoulder, which seemed to indicate that something had happened tonight,

"A clever plan, Miss Selwyn," Professor Dumbledore said mildly, "I think you got your house-elf to give the list to Fudge first."

"You're here, that means I've succeeded, right?" The thorn bushes parted layer by layer, and Selwyn asked softly,

"Why did your father put his chips in that direction at this time?" Dumbledore asked curiously, "I thought Tom would be happy if there was a Death Eater in the Selwyn family?"

"Of course my father wouldn't," Selwyn said in a mocking tone, "but whoever has what I need, I'll give him the chips, won't I?"

"Very Slytherin," Dumbledore agreed, and he continued, "Then let's go, I'm sorry for you, Fawkes."

In the midst of the phoenix's singing, a burst of fire flashed, and Phoenix Fawkes left the Room of Requirement with Dumbledore and Lawrence.

───────

Note 1: When Harry cast the spell, many of them were not exactly memories, some were imaginary.