They walked back from Dumbledore's office in a particular kind of quiet — the kind that comes after information that genuinely rearranges things.
Harry was buzzing, working through the implications in real time, occasionally leaking excitement in the form of sharp glances and aborted half-sentences. Hermione was quiet in the way she was quiet when she was already three steps ahead and consolidating. Ron kept nearly saying something and stopping himself.
"If we destroy all of them," Harry said finally, unable to contain it, "Voldemort is actually — mortal. He can be killed like anyone else."
"Yes," Kevin said.
"We have no idea how many there are."
"We have some leads. Dumbledore will map it out. It's not random — there's a pattern." He glanced at Harry. "The diary is gone. The locket is contained. We're not starting from nothing."
"I know, but—" Harry pushed a hand through his hair. "Where would you even begin?"
"Think about what he cared about," Kevin said. "Power, legacy, uniqueness. He collected things that meant something to him — objects tied to the Founders, to his own bloodline, to his identity as someone exceptional and untouchable." He kept it brief and let Harry's own thinking do the rest. "Dumbledore knows this. He's been digging for years."
Ron frowned. "What if he buried one in the middle of the ocean? Or in some random forest?"
"Then he'd never be able to find it again if something happened to the others," Kevin said. "He couldn't feel the locket being swapped out — he had no passive awareness of its location. So he'd have to be able to return to it. It'd have to be somewhere he knew."
Ron thought about this. "That's actually — yeah. That narrows it down a lot, doesn't it."
"It narrows it down a great deal."
They turned onto the seventh-floor corridor heading toward the common room. The conversation drifted to the coming weekend — Harry wanted to start recruiting Dumbledore's Army beyond the Gryffindors who already knew about it. Ron had Quidditch to think about. Hermione had opinions about the organization of the sign-up process.
"We need a proper space," Harry said, half to himself. "The lake worked last year when it was just a few of us, but if we're opening it up — we need something indoors, big enough, away from foot traffic."
"I could ask Dumbledore for a classroom," Ron offered.
Hermione made the face she made when a solution was available and hadn't been noticed. "Is that really the best—"
"We'd need something that could change," Harry said. "Accommodate different group sizes. Different kinds of practice. Somewhere private enough that we're not worried about who walks past."
Kevin said: "If only there was a room that could be all of that."
They were on the seventh floor now, passing the stretch of corridor near Kevin's workshop.
Harry said: "Exactly. A room specifically for what we need, whenever we need it."
A door appeared in the wall.
It hadn't been there before. The stone simply rearranged itself — not slowly, not with any fanfare, just the quiet certainty of something that had been waiting for the right question. A large black door, solid and present, as if it had always been there and they had simply not been looking.
Everyone stopped.
Kevin stared at it. He'd walked this section of corridor hundreds of times. He'd wished, quietly and without particular urgency, for exactly this room, and nothing had happened. Now, with all four of them articulating the need together in front of it—
"Is that—" Ron started.
"The Room of Requirement," Hermione said, her voice going careful. "There's a reference in Hogwarts: A History. A room that only reveals itself to those who truly need it. That becomes what you need it to be."
Kevin pushed the door open.
Inside: a space so large it would have taken a substantial Undetectable Extension Charm to fit inside the castle walls, which meant it wasn't operating on ordinary architectural principles. High ceiling, stone floor, the particular quality of space that practice rooms had — emptied of everything that wasn't functional. Training dummies in one corner. The proportions suggesting a room that had understood what it was being asked to be.
"When did Hogwarts have rooms like this?" Harry asked, still in the doorway.
"Apparently always," Kevin said. "We just weren't asking the right way."
He stepped inside. His footfall echoed slightly in the empty space. He turned around slowly.
"No one owns this room. It appears when it's needed and becomes what's needed. There's no booking system, no monitoring that I'm aware of." He looked at Harry. "It's ours."
Harry walked in. Then Ron. Hermione came last, running her hand along the doorframe, reading the stonework the way she sometimes read text — looking for the grammar of it.
"We can use this whenever the D.A. meets," Harry said. His voice had taken on the quality it had when something clicked into place for him. "It'll be big enough. Private enough. And if we need it to be different for different sessions—"
"It will be," Kevin confirmed.
Harry turned to face the room. The training dummies in the corner, the high vault of the ceiling, the complete absence of anyone else.
He was smiling.
---
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