Hiding My Mastermind Core in a Yandere Academy

Chapter 61: Rose From the Vault

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The column of light hadn’t finished collapsing when the ground beneath the southeastern administrative quarter split open.

Neil was already moving before the courtyard’s stunned silence broke into shouting, cutting through the panicked crowd with Lilith half a step behind him, her sword-Qi already crackling faint and controlled around her fingers despite the healing bandages still wrapped beneath her sleeve. Senators scattered around them, robes flying, someone’s silver-trimmed cane clattering unheeded against the stones, and through it all Neil felt the strange, clarifying focus that came only in the seconds before a real threat, when there was no longer any room for the guilt that had followed him through the last week like a second shadow.

"You shouldn’t be running toward this," she said, not slowing to match his pace, if anything accelerating past him, her healing wounds apparently no obstacle at all against whatever instinct had seized her.

"Neither should you."

"I know." Something sharp and eager had entered her voice, the first real trace of her old intensity since the ravine — not manic, not fractured the way it had been in her worst nights, just focused, coiled, alive in a way Neil hadn’t seen from her since before her confinement. "I’m coming anyway. If something crawled out of that vault, I want to be the one standing between it and you."

They reached the quarter’s edge as the last tremor of the collapse settled, dust still hanging thick and choking in the air where the vault’s foundation had been. A crater, deep and irregular, had opened where the inscription’s chamber once sat, jagged stone edges still crumbling inward, and at its center, something moved.

Not a person. Not entirely.

Cold Observation, activate. Neil’s mind ran the assessment fast and clean, cataloguing every detail with the old, familiar precision he hadn’t fully trusted himself to access in days. "Kaede. Readings, now."

Kaede arrived seconds later, light-screens already flaring, her breath sharp with exertion from the run, strands of dark hair falling loose from her usual tight arrangement. "Spiritual signature doesn’t match any classified cultivator profile. It’s not drawing ambient Qi the way a living body would — it’s radiating it. Actively. In a pattern consistent with the inscription’s own transmission frequency, almost exactly."

"You’re saying the inscription made something."

"I’m saying whatever’s standing in that crater may not be separate from the inscription at all." Kaede’s voice tightened, her fingers flying across the projected readouts. "It might be a fragment of it, given form for the first time in decades."

The shape in the crater rose fully upright, and Neil’s stomach turned cold at what his eyes reported and his mind refused, for a full second, to accept cleanly. Vaguely human in outline, but wrong in every proportion that mattered — too tall, joints bending at angles that suggested no bone structure at all, its surface a shifting lattice of the same characters Kaede had spent days failing to translate, crawling across what might have been skin like something alive beneath glass, rearranging itself endlessly.

It turned toward them. It had no eyes Neil could identify, and still he felt, with absolute certainty, that it was looking directly at him, and only him.

"Neil Harlan," it said, and the voice carried none of the presence’s calm precision from the shed the night before — this was flatter, hollow, like something reciting words it didn’t fully understand the meaning of, each syllable landing with mechanical, unnerving evenness. "Bearer. Confirmed."

Not the rival signatory. Something else the countdown produced — an output, not an agent. A messenger, maybe. Or a probe.

"What are you," Neil said, forcing his voice level despite the cold crawling up his spine.

"Function unclear," it replied. "Directive clear. Confirm bearer proximity. Report to source."

"Report to who?" Kaede demanded, already backing toward better instrumentation range, her light-screens straining to process readings that clearly exceeded anything her calibration had ever expected to handle.

The construct didn’t answer her. It took one step forward, the crater’s rubble shifting beneath a weight that seemed to exist independent of its visible mass, and Lilith moved before Neil could give any instruction at all.

Her rapier — not the shadow-steel blade from her worst nights, but a standard Vespera training weapon she’d claimed from the search operation’s supply cache — flashed in a clean, practiced arc, sword-Qi trailing crimson light behind the strike like a comet’s tail.

The construct caught the blade with something that wasn’t quite a hand.

Not deflected. Caught, absorbed, the crimson Qi bleeding into the lattice of characters across its surface and vanishing entirely, as if the strike had simply been added to whatever fed it, another small meal in a process that had already been running for decades.

"Lilith, don’t feed it Qi—"

"I know." She was already pulling back, reassessing with the same sharp clarity she’d shown carrying guard rotation maps out of a confinement cell weeks ago, not the desperate frenzy of her worst moments at all. "It absorbs directed energy. It doesn’t absorb kinetic force. Watch."

She moved again before Neil could process the full distinction, this time not striking with Qi at all — a bare, physical blow from the rapier’s hilt, driven with pure trained combat technique into what might have been the construct’s center mass, no spiritual energy behind it whatsoever.

It staggered. Actually staggered, the lattice pattern flickering, destabilizing visibly at the point of impact, characters scattering and reforming out of sequence.

"There," Lilith said, breathing hard but grinning now, something fierce and alive in her expression that had nothing manic in it at all — just genuine, focused satisfaction at having solved a problem with her own hands, her own body, without needing anyone to manage her toward the solution.

"It’s built to consume spiritual attacks. Nobody built it to survive being hit like an ordinary thing would be hit."

She’s right. And she found that faster than I did. Neil filed the observation away without letting it slow him down, his own mind already three steps ahead, assembling the shape of an actual plan instead of simply reacting to the threat unfolding in front of him.

"Kaede, can your instruments disrupt its transmission pattern directly? Not attack it — interfere with whatever signal it’s using to report back to whatever’s waiting on the other end."

"Possibly," Kaede said, fingers already moving across her light-screen’s controls, sweat beading at her temple despite the cold. "If I match its frequency and invert the phase, I can create localized interference strong enough to sever the transmission entirely. I’ll need thirty seconds of stable proximity to lock the pattern."

"You won’t get thirty seconds of stillness from that thing," Vance said, arriving at a dead run with two Committee enforcers, spears already leveled, her expression grim and focused. "We keep it occupied. You do your work, Investigator."

Neil’s mind assembled the plan whole in the space of a single breath — Lilith draws its attention with physical strikes, keeps it destabilized so it can’t fully process Kaede’s interference. Vance’s enforcers flank to prevent it retreating deeper into the crater where instrumentation range would fail entirely. I position for the exact moment Kaede needs me to confirm the phase-lock is holding steady.

"Lilith, keep hitting it exactly like that — no Qi, pure force, don’t let it stabilize for even a second. Vance, flank left and right, cut off the crater’s deeper access before it can retreat. Kaede, the moment you’ve got a phase lock, tell me and I’ll confirm the pattern’s holding from a different angle."

Nobody argued. Nobody hesitated. For the first time in a week, Neil felt the specific, clarifying rhythm of a plan actually working in real time, each person moving into position with the kind of trust that hadn’t existed in this courtyard three months ago, back when every alliance was a transaction and every ally a variable to be managed.

Lilith struck again, and again, driving the construct backward with brutal, precise physical blows, her earlier obsessive fixation transmuted now into something sharper and more useful — not managing her volatility from the outside the way Neil once had, but wielding it herself, on her own terms, exactly where it did the most good for the people she’d chosen to protect.

"Confirm bearer proximity," the construct intoned again, staggering under Lilith’s fourth strike, its lattice flickering violently now, characters bleeding into static. "Source approaching completion. Directive—"

"Lock achieved," Kaede called, sharp and urgent, her voice cutting clean across the crater. "Neil, now!"

Neil moved into position, reading the interference pattern flaring across Kaede’s screens, his mind cross-referencing it instantly against everything he’d learned about the vault inscription’s original frequency during three exhausting nights of study. "Pattern’s holding — but it’s fighting the lock. Push harder on the third harmonic, it’s compensating there, trying to route around the interference."

Kaede’s hands flew across her controls, adjusting, recalculating on the fly with the same relentless precision she’d brought to every problem she’d ever faced, and the construct’s flickering lattice suddenly seized, characters freezing mid-shift, its hollow voice cutting off mid-word.

For three full seconds, nothing in the crater moved at all.

Then the construct simply collapsed, its lattice-body dissolving into a fine grey dust that scattered across the crater floor and vanished on the wind, leaving nothing behind except a faint, lingering warmth in the air and the ringing silence of a fight that had ended almost as abruptly as it began.

Lilith straightened, breathing hard, rapier still raised, something fierce and satisfied still burning in her expression as she turned toward Neil, silver hair loose and wild around her shoulders.

"That," she said, "felt better than anything I’ve done in six years."

Neil allowed himself exactly one breath of relief before Kaede’s voice, sharp with fresh alarm, cut through the courtyard.

"Neil. Before the interference locked, I caught a fragment of its transmission." Her face had gone pale, the light-screen’s readings still glowing faintly in front of her, numbers scrolling past too fast for anyone but her to read. "It wasn’t just confirming your proximity. It said source approaching completion. The countdown isn’t measured in days anymore, based on the acceleration curve I’ve been tracking since the tribunal."

"How long," Neil said.

Kaede looked up from her screens, and for the first time since he’d known her, genuine fear had replaced her usual clinical composure entirely.

"Seven days," she said. "Maybe less."

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