By October, Tom no longer needed to seek people out with the same frequency he had at the beginning of term.
That was one of the more satisfying developments.
Influence, when it depended on constant direct maintenance, was inefficient. It tied too much of its structure to the origin point. It required repeated intervention, visible availability, and a level of labor Tom had no interest in sustaining once a system could be taught to preserve itself. The best kinds of influence did not behave like chains. They behaved like habits. They reorganized expectation until people moved toward the source on their own, and eventually, even that source became less important than the pattern it had created.
Students approached him now.
Sometimes with homework questions so ordinary they were almost insulting in their simplicity. Sometimes with uncertainty disguised as academic discussion. Sometimes under the pretense of sharing notes, comparing methods, asking whether a professor preferred one formulation over another. But beneath those reasons, more often than not, sat something else: calibration.
They wanted to know whether they were doing well.
Whether they were improving.
Whether someone who seemed to understand the hidden architecture of success better than they did could tell them where they stood.
Tom never answered directly.
Direct answers created premature fixation. They pushed people too quickly toward stable loyalty or resentment, and stable loyalties were fragile if built before dependence matured. A child who is told too early what role he has in someone else's structure either clings too visibly or resists too dramatically. Tom preferred ambiguity. He gave fragments. One correction, one observation, one sentence placed carefully enough that the student completed the meaning alone over the next hours or days.
That was stronger.
Self-completed interpretations adhered more deeply than instructions.
The first circle formed without announcement.
No one would have called it a circle at the time. No one would have named it as such, because naming created consciousness and consciousness altered behavior. That was why Tom allowed it to form through use rather than declaration. The students within it were not followers in any explicit sense. He would not have tolerated the word. It was too theatrical, too self-revealing, too dependent on visible hierarchy.
They were simply the students who had learned that things tended to go better when they listened to him.
Theodore Nott was the center of it, though not visibly. That suited Tom well. Nott's reserve made him structurally valuable. He did not attract attention, did not talk too much, did not need to be seen performing closeness in order to feel secure in it. Around him gathered two other Slytherins who had begun drifting into the same study periods, and on some evenings a Ravenclaw joined them under the mild excuse of sharing notes. Their sessions appeared ordinary enough from outside: textbooks open, essays compared, occasional quiet disagreement. But something had begun to organize itself there. Tom's questions framed the conversation even when he spoke least. His evaluations—when given—carried more weight than teacher comments the others had received more explicitly.
The first test of the circle came in the common room one evening, and like most of Tom's tests, it began with almost nothing.
Earlier that day, a second-year had made an offhand remark about Gryffindors receiving more visible praise from professors because their failures were louder and their recoveries more theatrical. Under normal conditions, such a complaint would have died almost immediately. Schoolchildren say comparative things all the time. Most vanish because they are too shapeless to travel. Tom heard it, stored it, and waited.
Later, while the small study group had formed itself around the low table near the common room windows, he mentioned the idea once.
Not as complaint.
Not as accusation.
As observation.
"Visibility distorts judgment," he said, turning a page in his book.
One of the boys looked up. "You mean professors notice showiness more?"
Tom let half a second pass. "Sometimes. Sometimes students do."
That was all.
He returned to reading.
No one pressed him immediately, which was exactly as he expected. The power of such a sentence did not lie in immediate uptake. It lay in how efficiently it attached itself to preexisting frustration. One of the boys had already been irritated by a Gryffindor receiving praise for a messy but enthusiastic recovery in class. The Ravenclaw had privately resented how often visible confidence was interpreted as competence by students who should have known better. Nott, though quieter, had been gathering examples of his own for weeks. Tom's sentence did not create the idea. It cleaned it.
By bedtime, the complaint had acquired structure.
A Slytherin first-year repeated a version of it elsewhere as though the thought had originated with him. The Ravenclaw refined it further, speaking not of professors alone but of house reputations shaping expectation before performance even began. Another student, hearing only the cleaner version, accepted it because it aligned with something he had already half-felt but never organized.
None of them cited Tom.
Most of them no longer realized the idea had begun in his presence.
That was the point.
Across the castle, Harry could not have described any of this specifically, but he felt its effects in the increasingly familiar way—through atmosphere first, evidence second. Something about the school's conversations had shifted. Small categories were hardening. Students were speaking in more generalized terms, taking isolated moments and attaching them to house character, teacher bias, the supposed habits of one kind of person or another. Nothing dramatic. Nothing large enough that an adult would call a meeting over it. But enough that Harry found himself angrier than the scale of the incidents seemed to justify.
Small things were harder to fight.
No one wanted to hear warnings about tone, timing, implication, and drift. Those did not sound like threats. They sounded like overthinking.
At the staff table, Dumbledore was beginning to see what Harry could not yet articulate. Tom was no longer merely producing effects. He was becoming a point of organization. That distinction mattered. Influence isolated in separate incidents could still be explained away as personality, intelligence, or unusual maturity. Influence that began to organize other people's perceptions of one another was more serious.
Still, the boy had done nothing punishable.
That fact remained like a stone in Dumbledore's mind—heavy, undeniable, and deeply inconvenient. There was no rule against being useful in the wrong way. No policy against selecting the right sentence for the right child at the right moment. Schools were built to handle disobedience, cruelty, dishonesty, open manipulation. Tom trafficked in none of those things directly. He trafficked in interpretive pressure.
One afternoon later that week, Dumbledore saw an illustration of this so small that almost no one else would have marked it. Two first-years were leaving a classroom together, one agitated, one embarrassed. Tom was not with them and had not spoken to either in those final moments. But Dumbledore had seen him earlier, saying something quiet to one and nothing at all to the other. By evening, the agitated child had turned a mild criticism into a matter of principle and the embarrassed one had withdrawn just enough to make the misunderstanding hold. Not caused. Not commanded. Organized.
The first circle around Tom grew because circles are attractive to the uncertain.
Students who had once drifted now began to time their study with his. They did not sit too close too quickly. Tom would have discouraged that instinct if it appeared. Neediness had to be thinned before it became disruptive. But they learned the shape of his availability. They learned when he was most likely to respond, when silence meant disinterest and when it meant that the question itself was poorly formed. They learned that being ignored by him felt worse than being corrected, because correction implied usefulness and usefulness implied continued relevance.
Dependence formed faster than affection.
Tom had already confirmed that.
Now he was watching the second stage: distributed dependence, in which the group itself began reinforcing the value of his judgment even when he was not actively supplying it. A student corrected another using language Tom had once used. Nott rejected an interpretation not because Tom had explicitly told him to, but because he had learned to test it against the standards Tom seemed to value—precision, stability, hidden leverage, structural explanation. Draco, though never fully inside the circle in the same manner, had begun bringing to Tom not his own uncertainty but other people's. He liked proximity to centrality. Tom made use of that without trusting it too much.
One evening in the common room, Draco lowered himself into the chair opposite Tom with the expression of someone carrying news he expected to be rewarded for.
"Some of the older students think the Gryffindors get away with more because they're noisier," he said.
Tom did not look up from his parchment. "They might."
Draco grinned slightly. "You said that like you wanted me to repeat it."
Tom set down the quill then and regarded him. "If I wanted you to repeat it, you wouldn't know."
Draco laughed, but the sound had a nervous edge beneath it now. He was beginning to grasp that there were levels to Tom's thinking he did not fully reach. That did not make him withdraw. If anything, it made him more attentive.
The Ravenclaw who occasionally joined the study circle arrived soon after, ostensibly to compare notes on a charm sequence. Within ten minutes, the discussion had shifted toward whether teacher expectations changed student performance before any spell was cast. Tom contributed little. He did not need to. The idea already held. The others worried it, shaped it, tested it against experience. That was another threshold crossed: the group was now capable of generating useful conversation from a sentence-seed without needing Tom to carry the exchange.
In the learning space that night, Andros recognized the difference before Tom spoke of it.
"There are more of them," he said.
Tom was practicing wandless control again, balancing several small objects in a measured orbit. "Yes."
"They come to you now."
"Yes."
Andros watched the orbit for a long moment. "And you are pleased."
Tom considered that. "No."
Andros raised an eyebrow.
"I'm satisfied," Tom said. "Pleased would imply surprise."
A faint, tired sadness passed through Andros's expression. "You speak as though this were engineering."
Tom let one of the objects descend, then another. "It is."
"No. It is not."
Tom glanced at him. "You object to the material, not the method."
"That distinction should matter to you more than it does."
"Why?" Tom asked, though not with real curiosity. He already knew Andros's answer would be moral, and morality interested him mainly when it altered outcomes.
"Because if people become material to you," Andros said quietly, "you will eventually become inhuman to yourself."
Tom returned his attention to the floating objects. "That assumes there is a stable human center worth preserving."
Andros did not answer immediately.
When he did, the answer was softer than Tom expected.
"There is," he said. "Even in you."
Tom said nothing.
Not because the statement touched him exactly, though perhaps some small part of it did. More because silence left the sentence unconfirmed and unrefuted, which made it easier to set aside.
Back in the dormitory later, Nott spoke from the dark.
"They listen to each other differently when you're around."
Tom lay on his back, hands still, eyes open to the dark canopy above. "Yes."
"Is that what you wanted?"
Tom thought for a moment. "It's the beginning of what I wanted."
Nott was quiet. Then: "What comes next?"
Tom turned his head slightly toward the sound of his voice, though the room was too dark to make much of the movement visible.
"Repetition," he said.
That was the truth of circles. They did not become structure through one successful evening or one set of useful conversations. They became structure when repetition made them feel natural, when participation no longer felt like a choice but like the path of least resistance, when people brought not just questions but each other.
Tom closed his eyes after that and let the day resolve itself into pattern. The first circle had formed. Small, quiet, deniable. Not loyalty. Not yet. Something better for the moment: habit, expectation, interpretive dependence. The students within it would not have said they belonged to him. Most would have rejected the idea if phrased too clearly.
But belonging, Tom had learned, began long before it could be named.