What followed was something close to miraculous.
Fawkes, it turned out, was not merely decorative. The phoenix allowed all of them — Harry, Ron, Ginny, a dazed Lockhart, and Draco — to grip his long tail feathers, and carried the unlikely cluster of them upward through the pipe and back to the surface without difficulty. Draco filed this information away with the methodical interest he applied to most things.
Myrtle was waiting at the pipe opening, drifting back and forth with restless anticipation.
"What a disappointment," she said, taking in the sight of them — alive, all of them, and with one extra. "Not a single fatality?"
"What sort of thing is that to say?" Ron said, disgusted.
Myrtle circled them once in dissatisfaction, sighed dramatically, and retreated down her favourite toilet.
Fawkes led them through the castle, flying low and self-importantly, his head held high and his melodious calls echoing off the stone corridors, until he had guided them all the way to the Headmaster's office.
───────────────────────────────────────────
What followed in the office was, from Draco's perspective, the most information-dense thirty minutes he had experienced in either of his lives.
Arthur and Molly Weasley had been waiting inside, white-faced with dread. When the door opened and Ginny walked through it, they crossed the room so quickly it barely registered, and then there was a great deal of weeping. Draco looked away and studied the portraits.
Harry placed everything he was carrying on Dumbledore's desk — both wands, the Sorting Hat, Gryffindor's sword, the ruined diary — and then gave his account, quietly and completely, of everything that had happened in the Chamber. The room was absolutely still. Draco listened, filling in the gaps of what he hadn't witnessed directly.
Some of it he already knew. Some of it surprised him.
Harry had recognised Myrtle, he learned, as the girl who had died in that bathroom fifty years ago. Dumbledore confirmed, with the particular careful steadiness of a man revealing something long carried, that he had been a professor at Hogwarts when it happened — when Tom Riddle had been a student. Phoenix tears could neutralise basilisk venom; Fawkes had saved Harry's life after the basilisk's fang had pierced his arm. And the diary — Tom Riddle's memory, his preserved sixteen-year-old self — had been able to siphon life from Ginny Weasley to gradually become corporeal, a thinking, acting presence, capable of taking a wand and turning it on a twelve-year-old boy.
Draco heard all of this. He catalogued it. He kept his expression perfectly neutral.
And then, quietly, almost without noticing, the thought arrived.
A diary that developed its own will. A memory that became a presence. A fragment of personality that could drain life from the living to sustain itself.
That was not simple Dark magic. That was not a curse or an enchantment.
That was a soul.
Or part of one.
Draco felt the blood leave his face. He pressed his palms together and focused on keeping his breathing even.
A Horcrux.
If Voldemort had made the diary into a Horcrux — a receptacle for a fragment of his own soul — then Draco's understanding of the situation shifted, violently, in a direction he did not like. Because Voldemort would not have created only one. That was not how a man who feared death above all things would reason. You made one, and then you wondered why stop there. You made several. You hid them.
How many? Where?
Draco stood very still beside Harry and thought about the basilisk fangs in his satchel, and about the Grey Lady's diadem, and about everything he did not yet know.
Eventually, the Weasleys were escorted to the hospital wing — Ginny needed a thorough examination — and Professor McGonagall was sent to arrange the celebratory feast. Dumbledore looked at Harry and Ron with warm, tired eyes and told them to go to the hospital wing and have their injuries seen to, and to come and see him before dinner.
Then, as Harry and Ron moved toward the door, Dumbledore said pleasantly, "Mr. Malfoy, would you stay a moment? I have a question or two, if you don't mind."
Harry and Ron both looked at Draco. Draco kept his face composed and gave them a small nod — go on — and they left, though Ron glanced back twice.
Dumbledore raised his wand and a comfortable chair moved across the room to settle behind Draco. "Please sit down."
Draco sat.
"So," Dumbledore said, with the amiable tone he used when he was, in fact, being extremely precise. "Tell me, Draco — what was your role in all of this?"
Draco had thought, on the long walk back up through the tunnel, about how to answer this particular question.
Looking at Dumbledore still required a deliberate act of will. In his previous life, the last conversation he had witnessed between Draco and Dumbledore had taken place on the Astronomy Tower, Dumbledore already weakened by the Horcrux ring, and Draco's wand shaking in his own hand.
This Dumbledore was not that one. This Dumbledore was at the height of his power.
"I happened to be there," Draco said. "I helped clear the rubble from the tunnel collapse. That's essentially all."
Those blue eyes considered him with the focused attention of someone who had spent decades reading people.
Draco did not look directly into them for long. It was not that he feared Legilimency breaking through his Occlumency — he was reasonably confident it wouldn't — but he did not want Dumbledore to notice, in a twelve-year-old boy, the quality of mental discipline that Occlumency required. That would raise questions he was not prepared to answer.
He looked instead at the Sorting Hat on the desk. At the sword beside it, still dark at the blade.
Dumbledore let the silence sit for a moment, then changed direction entirely. "Madam Pomfrey tells me you brewed a Mandrake Restorative Draught. In your second year."
"It was fortunate that it worked," Draco said carefully.
"Indeed. Not many students in their seventh year could manage that particular potion." Dumbledore's tone was still pleasant. "You also apprehended Peter Pettigrew not long ago, which led to Sirius Black's exoneration. And today, by all accounts, you placed yourself between Professor Lockhart's wand and Mr. Weasley."
"Sirius Black is my mother's cousin," Draco said. "In a sense, I owe him a degree of family loyalty."
"Ah, yes. I had almost forgotten." Dumbledore's eyes were amused. "And Mr. Weasley? Is he also a distant relation?"
Draco was briefly, genuinely caught out. He recovered quickly, but not quickly enough, and he saw from Dumbledore's expression that the man had noted it.
He resolved, for the second time that day, never to tell Ron Weasley anything sensitive. The boy couldn't keep a secret from a portrait, let alone from Albus Dumbledore.
"I think," Dumbledore said, setting down his quill and folding his hands, "that you consider Harry, Ron, and Miss Granger — who is currently resting in the hospital wing — to be your friends. I think you have helped them in a number of ways that none of us have seen clearly. And I think you know rather more about what happened in this castle this year than you've let on." He paused. "I could be wrong. I'm old, as I'm frequently reminded."
Draco said nothing. Silence was often the most defensible position.
"You refused the Special Contribution Award," Dumbledore said. "That surprised me. Why?"
This, Draco had thought about too.
"I don't think I deserve it," he said. "The recognition should go to Harry and the Weasleys."
Dumbledore looked at him over his half-moon spectacles. "Is it perhaps because of the diary?"
Draco went still.
"You haven't looked at it once since you sat down," Dumbledore said mildly. "Everything else on this desk — the sword, the hat, the wands — you've glanced at. The diary you've been carefully not looking at. I noticed it when you first walked in."
Draco pressed his lips together. There was no point in deflecting when Dumbledore had already read him that accurately.
He took a breath.
He made his decision.
───────────────────────────────────────────
"Can I trust you?" he said.
Dumbledore's expression shifted slightly. He had not, clearly, expected that question, or that tone.
"Telling you what I know means handing you the Malfoy family's most dangerous secret," Draco said steadily. "I need your protection in exchange. For my family."
"If the price of the secret is so high," Dumbledore said slowly, "then yes. You have it."
"I need your word. Formally. Today's conversation remains between the two of us."
A pause. Then Dumbledore raised his wand — the Elder Wand, Draco noted, with a cold recognition — and said, with full gravity: "I, Albus Percival Wulfric Brian Dumbledore, swear on my magic and my honour that I will keep this confidence and not disclose what passes between us today to any third party."
He drew the ancient symbol in the air. It glimmered briefly and was gone.
Draco looked at the diary on the desk and began.
"It starts with that," he said. "My father was a Death Eater. I believe that during the years when Voldemort was at the height of his power, my father was given something to keep safe — this diary. He didn't understand what was in it, only that he'd been ordered to preserve it. As circumstances changed after Voldemort's disappearance, the diary eventually — through a chain of events I won't pretend to reconstruct fully — ended up at Hogwarts this year, in the hands of someone innocent."
He paused.
"When I later realised Harry had it, I tried to persuade him to bring it to you. Then it disappeared before that could happen. And then everything you've heard about today occurred." He looked at Dumbledore directly. "From what Harry described — Tom Riddle's memory, the way it developed volition, the way it drained life to become present in the world — I came to a conclusion that I believe you may have already reached yourself."
"Go on," Dumbledore said quietly.
"The diary was not simply enchanted. It had a will because it contained a piece of one." Draco kept his voice even. "A fragment of Voldemort's soul. Deliberately separated from the whole and preserved inside an object." He held Dumbledore's gaze. "I once heard my grandfather use a word for this, when he thought I wasn't listening. He spoke of it with revulsion. The word was Horcrux."
The portrait behind Dumbledore stirred. Former Headmaster Armando Dippet lurched sideways in his frame, and the painted teacup in his hand tipped and fell. Several other portraits craned to look. The office, which had been very quiet, became quieter still.
Dumbledore sat back. The scholarly enthusiasm that had animated him while Harry was speaking had gone entirely. He looked, for just a moment, old.
"That is not a word a twelve-year-old boy should know," he said softly.
"No," Draco agreed. "My grandfather should have been more careful."
"Abraxas always was careless with his tongue when he thought no one important was listening." Dumbledore was quiet for a long moment. Then he said, as if speaking to himself as much as to Draco: "Of course. Of course that's it. Why else would he persist — even disembodied, even in fragments — why else would he be so very difficult to extinguish..."
He trailed off. Draco waited.
"So it can be done," Dumbledore said at last, looking at the ruined diary. "The fangs. Basilisk venom."
"Yes," Draco said. "Apparently."
It was not a coincidence, of course, but there was no reason to say so.
"You understand," Draco continued, "that this is why I declined the award. Whatever role the Malfoy family played in bringing that diary to Hogwarts — I cannot stand beside Harry and accept recognition while that debt is outstanding. It wouldn't be right." He paused. "And there is something else."
Dumbledore looked at him.
"I don't believe the diary is the only one," Draco said. "A man who feared death as much as Voldemort did — he would not have stopped at one. I don't know how many there are, or what forms they take, or where they're hidden. But I think you should assume there are more. And I think—" He hesitated, then finished quietly: "I think you're better placed than anyone to find them."
He had turned it over in his mind during the walk back through the tunnel. He was twelve years old. He had basilisk fangs, and he had the Grey Lady's diadem — the Ravenclaw Horcrux — somewhere on his mental map of things to deal with. But he did not know the others. He had never known the others. And this was not something one person could manage alone.
The Malfoy family had always understood when to form alliances.
Dumbledore was quiet for a long time. When he spoke, his voice was careful and considered: "Slytherin students have surprised me more often than any other house, over the years. But I confess, I did not expect this from a Malfoy." He regarded Draco with something that was not quite warmth and not quite sorrow, but somewhere between the two. "I'll honour what I've promised. The Malfoy family has my protection, and Lucius will not be pursued for his role in the diary's arrival here. As for the award — I respect your choice, though I disagree with it. Hogwarts will note what you did today."
Draco breathed out slowly.
"Now," Dumbledore said, in a lighter tone that Draco recognised as deliberate, "I think you should go to the feast and get some food into you. You look as though you've had quite enough for one day." He glanced at the diary, then back at Draco with a thoughtful look. "And — Professor Sprout tells me the Mandrakes are very nearly ready. If you would like to make yourself useful over the coming days, I wonder if you might assist Professor Snape in brewing the Restorative Draught. To revive the students who were Petrified. It might, as you said, help balance the ledger."
"Yes," Draco said. "I'd like to do that."
He stood, crossed toward the door, and then stopped.
He turned back.
"One last question, Professor." He kept his voice quiet. "You taught him. You knew him — when he was a student, when he was young. Is there anything that mattered to him particularly? Any number, or symbol, or object? Anything that held a special significance for him?"
Dumbledore's expression shifted. Draco watched him understand the full implication — not just the question about Voldemort's past, but the question about what other Horcruxes might look like, what Voldemort might have chosen to pour a piece of his soul into.
The old Headmaster sat for a long moment in his high-backed chair, the weight of it visible in his face.
"That," he said at last, "is not a question I can answer quickly. Or carelessly." He looked at Draco steadily. "Give me time. I will look into it. And when I have something worth telling you, I will."
Draco nodded once.
"Trust me," Dumbledore said quietly, and there was something in his voice that was not a reassurance so much as a promise between equals. "One day, we will work it out. Together."
Draco looked at him for a moment — this man who, in another life, had died on a tower while trying to give Draco a way out — and then turned and walked out of the office, pulling the door gently shut behind him.