Sebastian found him in the library the next morning, dropping into the seat across from him without invitation.

  "I know somewhere we can practice," Sebastian said. "Somewhere private. Ominis and I have been using it since first year for dueling, and no one's ever found us there. Anne too, before she stopped coming to watch us hex each other." He leaned forward, elbows on the table, voice dropping below the ambient murmur of students studying nearby. "Meet me tonight. Nine o'clock, bottom of the Defence Against the Dark Arts tower, near the big horned skeleton on the ground floor. Don't tell anyone. Ominis would have my head if he knew I was even considering bringing someone else."

  "All right," Rowan said.

  "I'll talk him around before tonight. He'll grumble, but he'll come." Sebastian stood and gathered his things, and that crooked smile surfaced briefly. "See you then, Ashcroft."

  The Defence Against the Dark Arts tower was quiet at nine. Rowan found the skeleton easily, a large horned creature mounted against the wall, its empty eye sockets staring down the corridor. Sebastian was already there, leaning against the wall beside it, and behind him stood Ominis Gaunt, pale and composed, his clouded eyes fixed on nothing. His wand was held loosely at his side, its tip emitting a faint directional pulse that Rowan recognized as a navigation charm of some kind. Adapted wandwork for moving without sight.

  "Ashcroft," Ominis said. His voice carried the careful enunciation of old wizarding families, measured and precise, shaped by generations of people who expected to be listened to. "Sebastian has spent the last hour explaining why I should allow this. I'm not entirely convinced, but I trust his judgment on dueling matters, if nothing else."

  "I appreciate it," Rowan said.

  "Don't appreciate it yet. If this goes badly, I'll hold both of you responsible." Ominis turned his head toward Sebastian. "Go on, then."

  Sebastian placed his wand against what appeared to be an ordinary section of wall and pressed. The stone shimmered and folded inward, revealing a magical cabinet set into an alcove. He opened it and gestured for Rowan to follow.

  The cabinet opened onto a passage that descended steeply, rough-hewn steps spiraling into warm, dry air. Ominis took the stairs with the ease of someone who'd walked them hundreds of times, his navigation charm unnecessary in a space he knew by memory. The staircase opened into a wide vaulted chamber, and Rowan stopped.

  The space was larger than he'd expected. Vaulted ceilings supported by thick columns, stonework carved with symbols Rowan didn't recognize. Torches lined the walls, already lit, their flames steady and smokeless.

  The center had been cleared into an open area with training dummies along one wall, and a corner had been furnished with mismatched chairs, a table, and a trunk.

  "We call it the Undercroft," Sebastian said, watching Rowan take it in. "Knowledge of this place has been in Ominis's family for generations. He showed Anne and me when we started at Hogwarts."

  "We used to play Gobstones down here," Ominis said, settling into one of the chairs with the practiced ease of someone returning to a familiar seat. "Before Sebastian decided the space was better suited to setting things on fire."

  "Dueling practice," Sebastian corrected.

  "The distinction is lost on the training dummies." Ominis's tone was dry, but not pointed. An old complaint, worn comfortable by repetition.

  A door at the far end of the passage opened, and Anne Sallow came down the last few steps carrying a tea tray. She set it on the table and looked at Rowan with a warmth that was immediately distinct from her brother's sharp energy. Sebastian watched people the way he watched opponents, calculating angles and openings. Anne simply looked at them.

  "You're Rowan Ashcroft," she said. "I've been hearing your name for two years now. It's good to finally meet you properly."

  "Likewise."

  "Sebastian tells me you learned nonverbal casting over Christmas break and he wants you to teach him." She poured tea into mismatched cups she'd clearly collected from around the castle. "I told him that if he's going to learn this difficult a thing, he should do it somewhere comfortable, with tea. He disagreed. I brought the tea anyway."

  Sebastian was already in the center of the practice space, wand drawn, restless with the particular impatience he got when there was a skill in front of him and the learning hadn't started yet. "Are we going to talk, or are we going to do this?"

  Rowan set down his tea and walked to meet him.

  "Cast a Lumos," Rowan said.

  "Lumos." Bright and steady.

  "Hold it." Rowan glanced at Ominis and Anne, including them. "I explained the theory to Sebastian already, but the short version is that the incantation does two things: it triggers the spell and shapes the intent. Without it, you need to do both yourself." He turned back to Sebastian. "That's the theory. Now for the practice. There's a pull that gathers in your chest right before a spell fires. The magic starts moving before the word reaches your lips. I need you to feel that pull as separate from the word."

  Sebastian frowned, concentrating. The light wavered slightly. "I feel it. Right before it releases. Like a tension."

  "That's it. Now end the Lumos and try again without the word. Don't think Lumos, don't think any incantation at all. Just look at the tip of your wand and want light. Think about what accidental magic felt like as a child, if you can remember it. Pure intent with no structure. You wanted a thing badly enough and your magic responded."

  Sebastian raised his wand and stared at the tip. His jaw tightened, the same focused intensity he brought to the dueling platform channeled now into the effort of making something happen through will alone.

  Nothing happened.

  He tried again. Harder, his knuckles whitening around the grip, his arm rigid. Still nothing.

  "You're trying to force it through the same pathway it uses when you speak," Rowan said. "That pathway is closed without the incantation. You need to find a different one, and forcing won't get you there. It's the opposite of how you normally cast. Instead of pushing the magic out, you have to let it come."

  Sebastian lowered his wand. The frustration was obvious and undisguised. "That's the least helpful thing anyone's ever said to me. Let it come. What does that even mean?"

  "It means I sat with my wand for forty minutes before I managed to produce anything at all. Forty minutes of nothing, and then a light that barely flickered. There's no shortcut through the frustration. You just have to stay in it until the shift happens."

  Sebastian looked at him for a moment. Then he raised his wand again. This time the rigidity left his arm. He stood with his eyes on the wand tip, searching rather than forcing, and the chamber went quiet around them.

  Ominis sat in his chair with his head tilted slightly, as if listening for frequencies beyond the range of ordinary hearing. Anne sipped her tea without comment. The torches crackled softly.

  Five minutes passed. Ten. Fifteen.

  At twenty-three minutes, a faint shimmer appeared at the tip of Sebastian's wand. A ghost of light, barely there, flickering for a heartbeat and gone.

  Sebastian's eyes widened. "I didn't say anything. And that happened."

  "Try again," Rowan said.

  He tried. The shimmer came back, stronger, lasting a full second before it vanished. Sebastian let out a breath that was half disbelief and half exhilaration. "I can feel where it is now. Like trying to grab a thing in the dark—I know where it is but I can't get a proper hold on it."

  "That's exactly where I was after my first session. It comes with repetition. Your mind is building pathways it's never used before, and that takes time."

  They worked for another hour. Sebastian produced the shimmer four more times, each one slightly more defined, none lasting more than two seconds. When Rowan finally called a stop, Sebastian was breathing hard and sweating despite the cool air of the chamber.

  "Tomorrow night," Sebastian said, and it wasn't a question. The frustration hadn't left his face entirely, but it shared space now with the particular look of someone who'd touched the edge of a real thing and intended to get back there as quickly as possible.

  "Tomorrow night. The more consecutive days you practice, the faster the pathways build."

  They climbed the stairs together. Ominis replaced the ward on the entrance with a practiced gesture. At the top, before they parted ways, Ominis turned toward Rowan.

  "Sebastian doesn't share the Undercroft," Ominis said. Quiet and direct, with a weight his earlier dryness hadn't carried. "In two years, the only people who've set foot down there are Anne, Sebastian, and me. He argued with me for an hour tonight because he believed this was worth making an exception. I'd prefer not to discover he was wrong."

  "He wasn't," Rowan said.

  Ominis held his sightless gaze on Rowan for a moment longer, listening for whatever it was he listened for. Then he nodded once and walked away toward the Slytherin dungeons.

  They met every day for the next three weeks.

  Sebastian was fast. He didn't learn the methodical, theoretical way Rowan did, breaking problems into components and working through them systematically. Sebastian learned by throwing himself at the difficulty until it gave. By the end of the first week, he could produce a flickering nonverbal Lumos. By the end of the second, the light held steady for several seconds at a time.

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  Ominis attended most evenings, sitting in his chair, and Rowan came to understand that his presence was more useful than it appeared. Ominis was attuned to qualities of magical resonance that sighted wizards missed entirely. When Sebastian's casting shifted in a way too subtle for Rowan to see, Ominis would note it. "That one felt different. Closer." Or: "You hesitated at the last moment." The specificity of his perception was remarkable, and Sebastian listened to him with the attention of someone who'd learned to trust a friend's instincts over years.

  Anne came most evenings as well. She brought tea, asked questions about the theory behind what Rowan was teaching that showed a mind as sharp as her brother's even if her interests ran to Herbology rather than combat, and provided a grounding presence the practice sessions needed.

  Sebastian's intensity could fill a room until there was no air left in it. Anne gave them all permission to breathe.

  The Stunning Spell came in the third week. It was harder than the Lumos, requiring more focused intent, and Sebastian's instincts fought him at every step. He wanted to force the spell out with aggressive certainty and raw energy, the same way he forced verbal spells. The magic gathered and refused to release.

  "You're trying to overpower it," Rowan told him after several failed attempts. "You already know the incantation handles the shaping when you speak. Without it, shaping requires clarity, not power. Stop thinking about the Stunning Spell. Think about the result. The dummy falling. What impact looks like."

  Sebastian turned back to the dummy. His stance changed. The tension in his arm eased. His eyes focused on the center of the dummy's chest instead of his wand tip, and Rowan could see the moment the aggression gave way to precision.

  A flash of red light left his wand without a sound. It struck the wall a foot and a half to the left of the dummy, leaving a scorch mark on the stone.

  Sebastian stared at the mark. Then he looked at his wand, turning it over in his hand as if seeing it for the first time. "That was silent. That was a Stunner and I didn't say a word."

  "The aim will come. The hard part was making it happen at all."

  He cast nine more times. Three connected with the dummy, weak enough that they barely rocked it on its base, but each one arrived in silence. When the last one hit, Ominis said from his chair, "That was the cleanest of the three," and Sebastian sat down on the trunk looking exhausted and elated in equal measure.

  It was then that Sebastian asked the question Rowan had known was coming since the corridor outside the dueling club.

  "I need to ask you something, Ashcroft." Sebastian's voice was careful, choosing words because they mattered, the same deliberateness he'd had that first night in the library. "Two weeks. You learned nonverbal casting in two weeks, over Christmas break. Nine spells, reliable enough to duel Hecat. I've been at this for three weeks and I've got one spell that can't hit what I'm aiming at." He met Rowan's eyes. "You told me you had motivation and a lot of time alone with training dummies. That's true, but it's not the whole truth. There's an advantage you have that I don't. I could see it the night you dueled Hecat. The spells you were throwing had a weight behind them that doesn't match a second-year's core."

  Rowan was quiet for a moment. Sebastian had laid the question out with the same tactical clarity he brought to a duel, cutting through the surface to the thing that actually mattered. He deserved the same clarity in return.

  "My magical core expanded before Christmas break," Rowan said. "Significantly. I used a magical enhancer—a rare fungus I found in a sealed box from the Forbidden Forest, combined with a stabilizer potion to prevent the dark magical signature from corrupting the process. The expansion was permanent. Blainey's diagnostics showed readings far beyond normal for my age. It's why I was in the Hospital Wing at the start of term, and it's why I was able to learn nonverbal casting in two weeks. The expanded core meant that even imprecise, underpowered nonverbal spells hit with enough force to be functional. I had room to be bad at it and still produce results."

  The chamber was quiet. Sebastian's expression had gone still, the elation from the Stunning Spell replaced by concentration. He was processing the implications with the same speed and thoroughness he brought to reading an opponent's tactics, following each thread to its conclusion.

  "So the gap between us isn't just technique," Sebastian said. "It's fundamental. Your core is larger than mine, maybe larger than most adults, and that's permanent. When you duel, when you cast nonverbally, when you held off Hecat for two and a half minutes—that was raw magical capacity I can't match through practice."

  "The technique still matters. The core made it possible, but it didn't make it easy."

  "But it made it possible at a pace I can't replicate." Sebastian's voice was level, controlled. The muscles at the corners of his jaw worked once. "I'm not angry about it. You found it, you took a risk that could have killed you, and it paid off. That was your choice and your risk and you earned whatever came from it."

  He paused, and when he continued, the control was still there but what lay underneath had shifted. Rawer, more honest.

  "I just need a minute to sit with the fact that the gap between us is wider than I thought it was, and it's not going to close no matter how hard I work."

  Anne, who had been listening from her chair, reached over and set her hand briefly on Sebastian's arm. She didn't say anything. The gesture was simple and familiar, the kind of comfort that existed between people who had spent their entire lives learning each other's pain.

  Ominis spoke after a moment. "My family has vaults full of artifacts that claim to enhance magical ability. Dark objects, most of them, from generations of Gaunts who believed power could be taken rather than earned. Most of those artifacts killed the people who used them, or worse." He paused. "Whatever Ashcroft found, it was clearly built on genuine scholarship rather than dark magic and desperation. But the point stands that the thing is done and can't be undone. The question is what you do with where you are now, not where you wish you were."

  Sebastian looked at Ominis for a long moment. Then he exhaled, long and slow, and when he spoke again, some of the tension had eased from his shoulders. "I know. I know that. It's just—" He stopped. Shook his head. "Three weeks of work. One spell. And you're telling me the bloke who did it in two weeks had an advantage I'll never have."

  "You'll never have my core," Rowan said. "But you have things I don't. Your offensive instincts in a duel, the way you shift tactics in real-time, the speed of your decision-making under pressure. A bigger core doesn't give you any of that. When you nearly took the championship spot from me last year, that wasn't power. That was you."

  Sebastian held his gaze, searching. Whatever he found there was apparently enough, because the worst of the tightness around his eyes eased.

  "Nearly," he said quietly, and left it there.

  The weeks continued, and the shape of things between them changed without anyone marking the moment it happened. The competitive edge that had defined Rowan and Sebastian's relationship since the first day of dueling club didn't vanish, but it found a different form. Less opposition, more shared direction. They pushed each other, argued about technique and tactics, challenged each other's assumptions, and the friction produced something constructive rather than divisive.

  The decision about the championship came to Rowan on a Tuesday evening in late February, during dueling club.

  He'd fought four opponents that evening, all upperclassmen, and beaten each with a mix of verbal and nonverbal casting. From the sideline afterward, he watched Sebastian duel a fourth-year Gryffindor. Sebastian fought with his usual aggressive energy, but twice during the exchange his lips didn't move. The silent spells were weak, barely registering, but they arrived without warning, and the Gryffindor didn't react to either one in time. Sebastian won verbally, a clean Disarmer through an opening he'd built with a feint, but the seeds of a larger change were there.

  Rowan had already been to the championship. He'd fought his way to the finals as a first-year, youngest finalist in tournament history, and earned a silver medal. He'd stood on that stage and proven what he needed to prove. Now, with the expanded core and nonverbal casting, the challenge the tournament represented no longer matched what he needed. Against students his age, even the best from Beauxbatons and Durmstrang and Ilvermorny, his advantages were too large for the matches to teach him anything he couldn't learn faster elsewhere.

  And the things that had been building at the edges of his attention, the alchemical transmutation theory the Flamels had pointed him toward, the magitech applications he'd been sketching in his journal, the artificing concepts he and Lawrence had discussed, those were unsolved problems. The championship was a test he'd already passed. Alchemy and magitech were tests he hadn't begun.

  He found Hecat before breakfast the next morning.

  "Professor. I'd like to withdraw from the championship and recommend that Sebastian Sallow take the fourth spot."

  Hecat studied him. "Withdraw."

  "I've been to the tournament. I made finals. My priorities this year are elsewhere. Alchemy, Runes, practical applications I've been developing. Sebastian needs the competition, the preparation, the high-stakes matches. I don't, not this year."

  "And you're certain this isn't charity."

  "Sebastian would resent charity. This is me stepping back from a thing I've already done so that someone who hasn't had the chance can take it."

  Hecat was quiet for a moment. "Tell him yourself."

  He found Sebastian at lunch, at the far end of the Slytherin table with Ominis. Rowan sat down across from them. Several Slytherins glanced over.

  "I'm withdrawing from the championship," Rowan said. "I've spoken to Hecat. The fourth spot is yours."

  Sebastian's fork stopped. He set it down slowly and looked at Rowan with an expression that had nothing of his usual competitive sharpness in it. "You're withdrawing. From the tournament you made finals in. The thing you beat me for last year."

  "Yes."

  "Why."

  "Because I've been. I made finals. I have the silver medal. This year, my time is better spent on things the championship can't teach me. For you, four months of championship preparation will push you harder and further than anything else available right now."

  Sebastian was quiet for a long time. When he spoke, his voice was low enough that the noise of the Great Hall swallowed it from anyone not sitting directly across from him. "Here's my problem with this, Ashcroft. I lost that selection duel last year. Fair and square, on the platform, in front of everyone. If you give me the spot now, I didn't earn it. I got it because you decided you had better things to do, and that's a different thing entirely."

  "You earned it by being the best duelist in the club after me. The selection duel was close. You know it was close. And you've spent three weeks in the Undercroft learning nonverbal casting on nothing but stubbornness and talent, which is exactly the kind of person who should be representing Hogwarts."

  Sebastian held his gaze. Ominis sat between them, his sightless eyes aimed at the table, his attention entirely on the conversation.

  "Okay," Sebastian said finally. "I'll take the spot." He paused, and his expression shifted toward resolve. "But when I come back from that tournament, however it goes, I want you to know it was because I belonged there."

  "I wouldn't expect anything less."

  Sebastian picked up his fork and returned to his food with deliberate casualness. "Tomorrow night, then? I've got four months to turn a nonverbal Stunner into a weapon worth using on a stage."

  "Tomorrow night."

  Rowan walked back to the Ravenclaw table. Iris looked up from her textbook.

  "You gave him the championship spot," she said.

  "I've been. He hasn't."

  Iris considered this for a moment, then nodded and returned to her reading.

  Rowan opened his journal to the page he'd been working on the night before. The sketch was rough but functional: a three-tier runic array built around Kenaz as the core function rune. Controlled release. The luminaire.

  The idea had first come to him on the Victoria Embankment, almost two years ago, walking back to the Foundling Hospital after dark. The Embankment was one of the first streets in London to get the new electric arc lights, tall iron poles with brilliant white globes that turned the pavement bright as noon. He'd stood there watching the Thames reflect that unnatural brightness and thought about how the Muggle world was solving the oldest problem in civilization, darkness, through sheer engineering. Filaments and current and glass. The wizarding world had candles and torches and Lumos charms and had never thought to want more.

  He'd been thinking about it differently since rereading the Flamels' chapter on runic combination theory, the section where Nicholas had explained how Kenaz's geometry channelled magical energy into steady, directed output. Pair it with Sowilo for sustained intensity and Jera for continuous cycling, regulate the flow with Isa to prevent overload, bind the structure with Eihwaz, and the array would produce clean, stable, permanent magical light from a single activation.

  The theory was sound. What he didn't have yet was a substrate that could hold the inscription at scale without costing more than the product was worth, and that problem had been circling in his mind for weeks, pulling him back toward the Flamels' chapters on alchemical transmutation and the planetary hierarchy of metals.

  He picked up his quill and started writing.