One month later. Just before summer vacation.
The dojo was quiet, the lingering scent of incense barely clinging to the air.
Soft sunlight streamed through the wooden slats of the windows, casting long shadows on the polished floor.
Nero stood in the center, sword sheathed, eyes closed.
His breathing was steady, his presence unnaturally calm, as if he had dissolved into the flow of the world itself.
Mu and Zen observed him from the edge of the room, their gazes sharp and thoughtful.
For months, they had watched Nero refine his techniques, push past limits they hadn't thought possible.
And now, something had fundamentally changed.
"I can't feel a single trace of Void. It's not leaking from him anymore," Zen muttered, rubbing the back of his neck, brows furrowed in disbelief.
Mu nodded, arms crossed. "He's contained it."
In the month since Nero had first seen the wisps of Void Principle, he had poured every waking hour into refining his mental barriers.
His unique fusion of Occlumency and magical filtration had evolved, growing more sophisticated and intricate.
It was no longer just a mechanism to slow the influx of information, it had become a living system, constantly adjusting, perpetually regulating the flow of Void through his body and mind.
He'd built layer upon layer of magical defenses, each acting like a mesh, catching and dissolving the erosive effects of the Principle before they could sink into his psyche.
The result was astonishing: the Void was no longer trying to consume him.
It lingered, dormant, bound to his will but unable to spread.
Nero opened his eyes, the faint blue frost glow of his Raven Eyes fading as he exhaled. "How long?" he asked quietly.
"Twelve hours," Zen said. "You didn't slip once."
The corner of Nero's mouth lifted in a small, satisfied smile.
Twelve hours of maintaining absolute containment without the slightest leak.
He had done it.
Mu stepped forward, his voice low and even. "You've achieved what even we failed to do as Muzen. You've subdued a Principle without losing yourself to it."
"It's not subjugation," Nero corrected. "It's coexistence."
He could feel it, the Void curled around the edges of his consciousness like a tamed beast, neither dormant nor aggressive.
It didn't hunger, it didn't gnaw at his mind. It simply existed, flowing like a silent current.
Zen flopped onto the floor, stretching out like a starfish. "I can't believe it. You're a monster, kid."
"I thought we had established that already," Nero said dryly, wiping sweat from his brow with the back of his hand.
Mu paced slowly around him, scrutinizing every inch of his posture. "It's been a full year since you came here," he said at last. "Your control over Void, your understanding of Muga, your progress into Muso… it's impressive. But now that you've come this far…"
Zen sat up, propping his elbows on his knees. "What are you going to do, Nero? You've found a way to contain the Void. This was the prime reason why you came to Japan, to us. Will you go back to Hogwarts?"
Nero hesitated, eyes drifting to the rafters. He had thought about it.
More than once. The idea of returning to Hogwarts, seeing his friends, reconnecting with the life he had left behind.
But things weren't that simple anymore.
"I want to… eventually. But there's still more I need to understand."
Mu tilted his head. "What more?"
Nero turned to face them, his expression hardening. "Void is only one piece of the puzzle. Muga, Muso, Void, Cosmos… they're all fragments of a larger truth. The more I learn, the more I realize how far I am from understanding the full shape of magic itself."
Zen groaned, falling back onto the floor again. "Of course he's not satisfied. Why would he be satisfied? Why would he take a break like a normal person?"
Nero chuckled, sitting cross-legged on the floor. "I'm thinking of staying in Japan, at Mahoutokoro for my fourth year too, if you allow it.
Traveling to a few old shrines, studying whatever ancient texts I can get my hands on, curse-breaking some local dark artifacts.
I want to take this opportunity to deep dive more into Eastern magic. There might also be traces of other Principles out there, or philosophies that can help me further refine what I already have."
Mu's gaze sharpened. "Cosmos… You think it might be the key to balancing what the Void left behind?"
Nero nodded slowly.
Cosmos, the counterbalance to Void. The Principle of infinite creation, as opposed to infinite erasure. If Void was the end of all things, Cosmos was the endless beginning.
But if he could understand it… if he could bridge the gap between the two...
"I don't want to just try to use Void as a weapon," Nero said, voice quiet but resolute.
"I want to understand everything about it. Why it exists, what it means for magic, for existence itself. And I can't do that without knowing what opposes it."
Nero glanced toward Zen, a rare glint of admiration in his eyes. "And what's more, who better than Zen to guide me onto this path?"
Zen's eyes widened in mock surprise, then narrowed into a grin. "Me? Guiding someone seriously? That's probably the scariest thing I've done all year."
Mu's lips twitched. "He's not wrong."
Zen scratched the back of his head, laughing. "I've been teaching you Muso this whole time, hoping it'd help you touch Cosmos. I have my own understanding of Cosmos, but to be honest… I'm still figuring it out myself everyday. It's not like Muso, where you can refine your body and intent through discipline. Cosmos is…"
"Vast," Nero finished for him.
Zen nodded. "Impossibly so. But maybe now that you've stabilized Void, you'll notice connections I can't. Maybe that's the point, maybe these Principles need each other to fully make sense."
Nero nodded, determination hardening his features. "I'm willing to try."
Mu crossed his arms, watching them both with an unreadable expression. "If that's your decision, then your training here isn't over." He glanced at Zen. "Both of you."
Zen stretched, groaning. "I knew I shouldn't have opened my mouth."
The sun dipped lower in the sky, casting warm hues across the dojo floor.
Nero stood, the faint ache in his muscles barely registering as his mind spun with possibilities.
Zen slapped a hand on Nero's back. "Alright, Void Seeker. Ready to chase the impossible?"
Nero's eyes gleamed, a small smile tugging at his lips.
"Always."
The path ahead was endless. But Nero was no longer afraid of the abyss.
He was ready to step into infinity, and see what lay beyond.
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