"Professor, I wish you'd given us guidance like this sooner!"
After Lupin finished the final pre-tournant coaching session officially frad as extra credit for an upcoming exam, Ron's face was flushed with excitent, his words tumbling out in a rush.
"With your help, we're definitely going to win the Triwizard Tournant—"
He caught himself and coughed. "That is—I an, we're definitely going to earn a lot of extra credit on the exam!"
"Quality over quantity," Lupin said mildly, pretending he hadn't heard the first half of Ron's sentence.
His gaze settled on Harry, warm with encouragent and quiet expectation.
"This is the fruit of long effort. Without all the hard work and training you've put in over these past weeks, my guidance wouldn't have made nearly this much difference. And rember—when you're faced with chaos and sensory interference, stay alert. Trust your instincts. And trust the people beside you."
He glanced toward Sherlock's usual empty seat, his expression thoughtful.
"Sherlock's thods may be unconventional, but he's absolutely right about one thing, keeping a clear head is the key to handling anything. Fear and anger will blind you and lead you to make mistakes."
"Thank you, Professor."
Harry gave a solemn nod, feeling a warmth spreading through his chest.
In that mont, he felt he finally understood the deep-seated guilt and affection Lupin carried, the weight of emotion that had moved soone as rule-abiding as Lupin to make an exception, to offer this quiet, private coaching session.
A small crack in his carefully maintained persona, but a genuine one.
"All right, then." Lupin's familiar gentle smile returned, and he gave Harry's shoulder a light pat. "Let's call it here for today. You've done very well—go get so rest and save your strength. I have every confidence that Hogwarts' champions will not disappoint anyone."
He paused. "Oh, and you've all earned extra credit for your Defense Against the Dark Arts exam."
Even at the very end, Professor Lupin managed to provide justification for his exception.
The small crack in his persona, neatly sealed.
After thanking him, the three gathered their things and made their way out of the classroom.
The corridor was nearly deserted by now. The last light of the sun slanted through the tall windows and fell in long diagonal shafts across the stone floor, casting shadows that stretched like the arms of sleeping giants. Flecks of dust drifted lazily through the columns of gold.
"Professor Lupin was different today," Ron murmured as they walked. "That stuff he said at the end—it felt more serious than anything he teaches in class."
"He's worried about Sherlock and Harry." Hermione's voice was precise, cutting straight to the heart of it.
"He specifically ntioned sensory interference and a deliberately hostile environnt." She frowned.
"That makes uneasy. Harry, the third task—I think it may be far more complex and dangerous than we've imagined. I think I need to go back to the library and look into defensive spells, or maybe maze-breaking techniques—"
"Hey, Hermione!" Ron cut in with exasperated patience. "We've already prepared plenty. We've worked through every spell on that list—Lupin himself said we're ready! Can you please, just for once, not think about the library? We've got exams tomorrow, for starters. And look—even Sherlock isn't back yet, and it's nearly dark!"
At the ntion of Sherlock, Hermione's footsteps faltered almost imperceptibly. Her gaze drifted without aning to toward the Quidditch pitch in the distance.
The evening had draped the stadium in a wash of deep amber and red, softening its edges to a blur. From this far away, she couldn't make out any specific details—only the vast, hulking outline of the maze.
"Maybe you're right," she admitted at last, drawing in a slow breath and willing herself to let go of both the library and Sherlock, at least for now. "But I'm still a little worried. He's been gone so long. If he were only doing reconnaissance, he should have been back by now."
"Relax—it's Sherlock," Ron said, puffing himself up with theatrical confidence.
"If anything, other people should be worried about him. He's probably crouched in so dark corner right now, analyzing the angle of every crack in every brick and the precise tilt of every branch."
He grinned. "When the actual tournant cos, the ones who should be worried are Hagrid's monsters and the champions from Beauxbatons and Durmstrang. Though—I do hope Sherlock goes a little easy on Fleur and Krum..."
Hermione didn't dignify that with a response.
"Ron's right," Harry said, laughing quietly. He gave Hermione's shoulder a reassuring pat. "Co on—let's go to the Great Hall and eat. He'll probably be back by the ti we're done."
The three quickened their pace toward dinner.0p
Hermione let herself be convinced, yet the weight of Lupin's final words—so grave, so deliberate and the image of Sherlock's unaccountably absent figure lingered like a small, stubborn cloud at the back of her mind.
As they rounded the corner of the corridor, she glanced back involuntarily at the window.
The Quidditch pitch had faded to a shapeless silhouette in the dusk. She pressed her lower lip between her teeth, a strange, sharp premonition rising in her chest.
The great maze soon to beco the final battlefield seed to radiate an ominous stillness in the gathering dark, as though it were quietly drawing breath before sothing terrible.
While Hermione's heart churned with unease, the very person she was worrying about stood at the edge of the Quidditch pitch, entirely still.
The maze had been completed days ago, and the stadium was unrecognizable now. A towering hedge twenty feet of dense, dark green encircled the entire grounds like a fortified wall. Its surface was trimd to unnatural precision, yet it radiated a visceral warning: keep out.
The dying sun gilded the vast structure in molten copper before dropping behind the horizon, casting long shadows that sprawled across the earth like crouching beasts. Occasional gusts of wind stirred the hedge, drawing a soft, restless whisper from the leaves.
Sherlock stood with his usual focused stillness, the Marauder's Map unfolded in his hands, cross-referencing it carefully against what lay before him.
Gemma stood at his side.
As the sun descended, their two shadows stretched longer and longer across the ground, until at last they rged into one.
She pointed to the map's central region a churning, ink-dark sar that seed to writhe slowly in place and spoke with quiet surprise.
"I have to admit, this is beyond what I expected. The Confundus Charm's intensity is remarkable, the paths and nas in the core are completely blocked. Even this extraordinary map can't penetrate it."
This was her first ti seeing the Marauder's Map, and her astonishnt was plain. That such a remarkable object existed was surprising enough but the fact that Sherlock had chosen to share it with her made sothing bloom quietly in her chest that she couldn't quite na.
She had always assud Hermione was the one prone to sentint. Apparently, she was not entirely immune herself.
She returned her attention to the map and leaned in, adding more carefully, "That said, the defensive traces near the entrance aren't difficult to read. I can sll the sulfur characteristic of Hagrid's Blast-Ended Skrewts, and the spores from Professor Sprout's magical plants. There's also a fresh, woody scent young bramble, most likely woven in beneath it all. Set as a physical obstruction, I'd imagine."
Sherlock didn't respond imdiately.
He crouched slowly, drew his fingertips across the ground near the maze's entrance, and felt the rough, cold surface. Then he pinched a few wisps of charred grass between his fingers, examined them under a magical magnifying glass, and brought them briefly to his nose.
"There's more than that," he said at last, a quiet, satisfied note in his voice as he shook his head.
"Look at the distribution and depth of these marks. They weren't caused by biological impact or plant entanglent alone—the pattern doesn't match that kind of tearing. This is residue from a directed energy discharge. The angles converge consistently on the key path junctions."
He pointed. "And here, along the edges, heat scarring from magic. These are activation traces from pre-set magical traps. Interesting."
He paused. "I'd say soone was testing the defensive integrity. And whoever did it was not weak."
Gemma imdiately leaned closer, following the direction of his finger to examine the marks barely perceptible unless you knew precisely what you were looking for.
After a long mont, she looked at him with the sa expression she always arrived at when he did this sort of thing: thorough admiration.
"You're right. The energy residue on these marks is unusual—it's not the kind that ordinary defensive magic leaves behind."
She laughed softly, a teasing lilt in her voice. "It seems the Ministry's own protective asures ended up revealing the locations of the traps they set. I don't think they could have imagined that anyone like you existed."
She tilted her head. "Shall we simply go in and have a look? I don't see anyone around to stop us."
"The Ministry," Sherlock murmured, and let out a quiet, humorless laugh. His disdain was undisguised.
Since the glamour of the wizarding world had worn off for him, he had grown steadily clearer-eyed about the Ministry's actual competence and had long since stopped bothering to comnt on it.
He had borrowed the Marauder's Map from Harry as a precaution, a habit.
Just as Harry had told Lupin, all three of Hogwarts' champions felt genuinely confident about the third task.
But the dreams Harry had been suffering, the ones driven by that scar, Sherlock had long since concluded that Voldemort and his allies intended to interfere with the tournant's final event. And that ant he was not about to leave any potential danger unexamined.
He stood, dusted off his hands, and turned his gaze back to the parchnt.
The small ink-blot figures and nas of students and professors moved slowly across the map's diagram of the castle and its grounds, orderly, like stars drifting in a quiet sky.
His eyes moved like a scanner, sweeping across every corner of the map, rapidly filtering the vast density of information for anything worth seizing.
Then his gaze locked.
A na. Moving slowly along the second-floor corridor of the castle.
His brow tightened by a fraction. His breathing caught, just barely.
The pause was almost imperceptible, the kind of thing that would slip past most observers entirely.
But Gemma had kept her attention on him from the mont they arrived here, and nothing he did, however small, escaped her.
She followed his arrested gaze to the map. Her own pupils contracted.
"Barty Crouch?" she said slowly.
She tilted her head, perplexed. "Isn't he the forr Head of the Departnt of International Magical Cooperation? What's he doing at Hogwarts? The Triwizard Tournant has been fully handed over to Mr. Bagman and his departnt, Crouch has nothing to do with it anymore."
The official story from the Ministry was that Barty Crouch had stepped back due to health concerns and required rest.
But for a family like the Farley—a family with deep roots and the kinds of connections that mattered, private information was not hard to co by. What they knew was that Crouch had taken early retirent, withdrawing entirely from the Ministry's inner circles.
Even the Farleys, however, didn't know the real reason behind his departure.
Gemma's offhand remark detonated sothing in Sherlock's mind.
A strange, electric impulse took hold. He followed it.
In an instant, Sherlock slipped into a state that was difficult to describe, a level of cognition beyond his usual reach. His mind accelerated to a terrifying velocity, as a storm of fragnts lit up and collided in the dark.
The tidy, well-ordered attic of his mory palace dissolved around him. In its place rose sothing far more imnse: a vast, solemn hall, a mind palace, cathedral-scale.
Multiple versions of himself appeared within it, each holding different threads of evidence, each moving at extraordinary speed to sort and cross-reference every piece of information already known:
The Marauder's Map showed "Barty Crouch" inside Hogwarts Castle at this very mont.
After the events of last year, Barty Crouch Sr. had left the Ministry and Dumbledore had confird that he remained at ho, recuperating. He could not possibly be at Hogwarts.
But the Marauder's Map never lied. Even Peter Pettigrew, hiding in plain sight as a pet rat for twelve years had been labeled with his true na. The map had no rcy for disguises.
And yet the map could not distinguish between two people who shared the sa na.
Father and son, Barty Crouch Sr. and Barty Crouch Jr., bore identical nas.
And Barty Crouch Jr. had been seized during the prisoner escort following the Quidditch World Cup the previous year.
In Harry's dreams, those visions burning through the scar, Voldemort had entrusted Barty Crouch Jr. with a vital task, and praised him for carrying it out well. A task that made use of the Triwizard Tournant.
The fragnts snapped together in a single devastating mont, perfectly interlocking, forging a chain of logic with no missing link.
And every version of Sherlock in the mind palace spoke at once, their voices layering into one irrefutable conclusion:
"There is only one explanation."
"The 'Barty Crouch' on this map is not the forr Ministry official Gemma was thinking of—it is his son. Barty Crouch Jr."
"He has succeeded in deceiving everyone. He has infiltrated Hogwarts by so ans, living in shadow among us, waiting for the third task—waiting to execute Voldemort's plan."
In that mont, the transformation of Sherlock's mind palace was complete.
He had a na for what it had beco—this space that could hold countless threads at once, that could reason across multiple dinsions simultaneously.
He called it a Mind Palace.
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