Christmas break arrived with the usual exodus.
The common room had thinned over the past two days, trunks appearing by the portrait hole each morning, students saying their goodbyes and trickling away toward the Hogwarts Express. Rowan sat by the fire on the last Thursday evening with Iris, Edmund, Celeste, and Lawrence, the five of them occupying their usual corner while the castle emptied around them.
"I'm going to spend the break working on nonverbal casting," Rowan said.
Iris looked up from packing her bag. "Nonverbal."
"Hecat beat me because she could read my incantations. She knew what was coming before it arrived. I need to remove that advantage."
"That's a sixth-year skill," Lawrence said from behind his Charms textbook.
"I know."
Edmund leaned forward. "And you think you can learn it in two weeks?"
"I've been turning it over since Hecat put me on the floor. Two weeks with the castle empty, that's enough to get the fundamentals down."
Celeste studied him with her particular focused attention. "You've already worked out how you're going to do it."
"Stunner first. It's the spell I know best."
Iris closed her bag. "Promise me you'll eat. And sleep. And not spend fourteen hours a day practicing."
"I'll eat and sleep."
"That's not what I asked."
"I know."
Iris found him alone by the fire that night after the others had gone to bed.
"The real reason you think this will work," she said quietly. "It's the core."
"Silent casting loses power. Always has. But after the expansion, I've got power to spare. What cripples the technique for everyone else is exactly what I can afford."
"And you didn't tell the others because—"
"Because they don't know about the expansion. And I'd like to keep it that way for now."
She nodded. "Be careful with this. You're already drawing attention."
"I know."
She hugged him before she left the next morning, tightly and for longer than usual. Edmund clapped him on the shoulder, Celeste gave him a nod that carried more warmth than most people's embraces, and Lawrence slid a folded parchment across the table without explanation. Rowan opened it after they'd gone. Lawrence's notes on core density and spell response curves, annotated with suggestions for how expanded magical output might interact with wandless intent channeling.
He read it twice, added it to his journal, and made his way to the seventh floor.
The Room of Requirement gave him a long stone chamber with training dummies along one wall and enough open floor to move freely. Rowan stepped inside, drew his wand, and pointed it at the nearest dummy.
Stupefy.
He thought it clearly, precisely, holding the image of red light and impact in his mind exactly as the textbooks described.
Nothing happened.
He tried again. The wand movement was correct, the visualization precise. He could feel his magic responding, gathering in his palm, ready and waiting. But it didn't release.
He lowered his wand and sat on the stone floor.
He'd expected wandless magic to translate. It didn't. Wandless casting replaced the conduit, hand instead of wand, but the incantation still did the triggering and shaping.
Two years of casting had built a deep groove between thought and spell. The word told the magic now. Without it, the magic gathered but didn't fire.
He needed a different trigger entirely.
He spent the rest of that first day not casting spells at all. He sat with his wand and tried to produce raw light, no Lumos, no incantation, just will and the desire to see. The minutes stretched. Ten. Twenty. Thirty. His arm ached from holding the wand still. His concentration frayed and reformed and frayed again.
At forty minutes, a pale flicker appeared at the wand tip. It was unsteady, barely visible, and lasted less than a second before it vanished.
Rowan stared at the space where it had been. Then he raised his wand and tried again.
By evening, he could produce the light in under three seconds. It was crude and imprecise, shaped by will alone with no incantation to give it structure, but it existed. The pathway was there.
The next morning, he tried the Stunning Spell.
He didn't think Stupefy. He didn't think of the word at all. He looked at the training dummy and held in his mind a clear image of what he wanted: the red flash, the trajectory, the point of impact. He shaped the thought carefully, the way he'd shaped the light, as intent rather than language.
The spell left his wand in silence. It struck the wall three feet to the left of the dummy, leaving a scorch mark on the stone.
Rowan made a note in his journal and tried again.
The days took on a rhythm. Wake early, eat breakfast in the nearly empty Great Hall with Hector and the handful of students who'd stayed. Walk to the seventh floor. Spend the morning on nonverbal casting, hundreds of attempts, each one teaching him about the gap between intention and execution. Break for lunch. Afternoons for reading, the healing textbook Blainey had given him, theoretical texts on magical core development. Evenings back to practice.
The Stunning Spell came first because it was the spell he knew best. Four days before he could produce it with any consistency. On the third day, he landed three in a row on the dummy, then spent the next hour unable to produce a single one. On the fourth day, he hit the dummy seventeen times out of twenty attempts. That was enough. He moved to the Disarming Charm.
The Disarming Charm was harder. The Stunner was brute force, a single intention, hit and incapacitate. Expelliarmus required a more specific outcome: separate the target from their wand. The intent had to be precise or the spell went wide, and without the incantation to shape that precision, his first dozen attempts produced either feeble tugs or nothing at all.
He solved it by visualizing the wand leaving the target's hand rather than visualizing the spell itself. On the sixth day, he disarmed a dummy cleanly for the first time. By evening, he could do it reliably at ten paces.
The Shield Charm was different again. Defensive magic required sustained intent rather than a single directed burst. Protego needed to exist as a continuous thing, held in the mind and fed by will, and the moment his concentration wavered, the shield collapsed. He spent two full days on it, building the mental architecture to maintain a nonverbal shield while still being aware of his surroundings.
His curved Knockback Jinx was the hardest. The trajectory modification required thinking about two things at once, the force and the curve, and without the incantation to handle half the work, his brain kept collapsing the dual intention into one or the other. The spell either flew straight or curved weakly with no force behind it.
The breakthrough came on the ninth day, when he stopped trying to think about force and curve separately and instead visualized the entire arc as a single image: a line bending through space and striking the target. The spell left his wand in silence, curved around the dummy's shield position, and hit it square in the side.
By the end of the second week, he could cast nine different spells nonverbally. Some more reliably than others, but all functional. All silent.