Morning light filtered through the high windows of the family study. Klein stood quietly before the Duke's desk, hands clasped behind his back. The room smelled of aged oak and ink, the heavy curtains drawn just enough to keep the space dim and formal. Duke Vivian sat in his high-backed chair, a single sheet of parchment in front of him. It was the report from last night's spar.
Lirael Voss waited a respectful distance away, sword at her hip, posture straight as a blade. She had been summoned as witness. Adrian and Lady Elenora were absent; this was not a family discussion but an evaluation.
The Duke spoke without looking up.
"Lirael reports that you turned her own mana against her during a live exchange. You called it 'harmonic interference.' Explain."
Klein answered calmly, voice even.
"Prolonged blade contact allows frequency alignment between two mana signatures. When matched correctly, the flows cancel partially at the point of contact. The opponent's pulse loses amplitude while mine remains stable. It is measurable redirection, not force."
Lirael nodded once in confirmation.
"He did it twice, Your Grace. Cleanly. My strikes felt lighter the moment the blades locked. No wasted power on my side, yet the effect was real."
Vivian finally lifted his gaze. His black eyes held the same quiet weight Klein had observed since waking in this body.
"Master Harlan called your methods unorthodox. Border reports speak of raiders using crude mana bursts that overwhelm standard defenses. If your approach scales…"
He left the sentence unfinished, letting the implication settle.
Klein took the opening.
"It scales through refinement, not raw talent. Lirael's pulsed technique under live pressure revealed how physical movement acts as a natural conductor. Combined with resonant loops, output efficiency increases while internal strain decreases. The data from last night filled three new variables in my model."
The Duke leaned back slightly, studying his second son the way one might examine a newly forged blade.
"Two weeks until the academy scouts arrive. They will test every eligible heir, including those previously dismissed. Your recorded pathways remain below average on paper. Yet the estate has seen glowing flowers, reactivated artifacts, and now a junior knight instructor impressed enough to request continued sessions."
Lirael kept her expression neutral, but Klein caught the faint shift in her mana signature - steady pride mixed with caution.
"I train alone most nights," she said simply. "The Second Young Master's method offers practical value for border work. If the family permits, I will continue assisting."
Vivian considered her words for a long moment, then gave a single nod.
"Permitted. Under supervision. Report any anomalies directly to me."
He turned back to Klein.
"Demonstrate this interference here. On the practice blade."
Klein accepted the plain steel sword the Duke indicated. Lirael drew hers without hesitation. They faced each other in the open space before the desk. No audience beyond the Duke. No safety nets.
Lirael attacked first - a controlled cut aimed at his shoulder. Klein met it with his blade, forming a thin resonant loop along the edge the instant steel touched steel. The hum was soft but audible. For two heartbeats the blades locked, then Lirael's follow-through lost half its momentum, the force redirected sideways as if sliding off oiled glass.
"Frequency match achieved," Klein noted aloud. "Cancellation at contact point reduces transmitted energy by approximately fifty percent."
Lirael recovered smoothly and pressed with a series of short pulses. Klein adjusted in real time, tuning his loop to her rhythm. Each bind created the same subtle interference, turning her strength into a glancing echo.
After six exchanges the Duke raised a hand.
"Enough."
He stood and walked around the desk, examining both blades. The steel carried faint residual warmth but no damage.
"Practical," Vivian said. His tone remained neutral, yet something had shifted in his gaze - calculation rather than dismissal. "The Crownoval house has always favored control over spectacle. If this method can be taught without destabilizing traditional forms…"
He stopped, then addressed Lirael directly.
"You will spar with him three evenings per week. Record every technique he demonstrates. I want measurable progress reports."
Lirael bowed slightly.
"As you command."
As she turned to leave, she caught Klein's eye for a brief second. A small, private nod passed between them - acknowledgment of shared curiosity.
The Duke dismissed Klein with a curt gesture.
"Continue your studies. The scouts will not be lenient. Show them results, not theories."
Klein left the study and found Adrian waiting in the corridor, leaning against the wall with arms crossed.
"Father looked almost impressed," Adrian said, falling into step beside him. "That is rare. Mother is still worried about the academy, but she trusts you know what you are doing."
Klein nodded once.
"The demonstration confirmed the theory under direct observation. Lirael's involvement adds credibility. Her border experience provides real-world pressure data my solo experiments lacked."
They walked toward the eastern grounds where Lirael had already begun her afternoon drills. The air carried the distant clash of steel from the main field.
Lirael met them at the edge of the training circle. She had changed into lighter sparring gear, sword ready.
"Three evenings a week," she said, repeating the Duke's order. "We start now if you are free. No holding back on explanations. I want to understand how you tune those frequencies mid-fight."
Klein accepted the spare blade she offered. They began lightly, circling first.
"Basic principle," Klein explained as they exchanged testing strikes. "Every object and flow has a natural harmonic. Blades carry one shaped by forging and the user's mana. Matching it creates either reinforcement or interference."
Lirael's next cut came faster. Klein met it, locking blades. The hum returned. Her strike softened.
"Like that," he continued. "Your pulse peaks here - at the moment of impact. I adjust my loop to the exact opposite phase. Cancellation occurs."
Lirael stepped back, eyes bright with interest.
"On the border we call it 'riding the wave.' We never measured it like this. Show me how to do it intentionally."
Klein guided her through the first adjustment. He placed his hand on her sword hilt, channeling a thin resonant thread so she could feel the frequency shift directly.
"Visualize the blade as a circuit," he said. "Not a weapon. A conductor. Find the peak, then invert it against your opponent's flow."
Lirael tried it on her next swing against a wooden post. The impact rang differently - cleaner, with less vibration traveling up her arm.
"It worked," she muttered, half surprised. "Less strain on the wrist. I could fight longer like this."
They continued for nearly an hour. Klein mapped how physical stance influenced mana flow rate. Lirael demonstrated border techniques that relied on short, explosive pulses rather than sustained loops. Each exchange added new data points: how fatigue altered frequency stability, how terrain affected ambient ley draw, how emotional focus under pressure changed resonance speed.
By the end Lirael was breathing harder but grinning openly.
"You are turning swordplay into science," she said, sheathing her blade. "If the academy scouts see even half of this, they will not know whether to recruit you or investigate you."
Klein released his own flows and noted the session mentally.
"New variable confirmed: integrated physical-mana harmonics. Efficiency gains of twenty-eight percent when synchronized correctly. Scalable to group formations if taught properly."
Adrian, who had watched from the side, shook his head in quiet amusement.
"You two are going to cause rumors. A talentless second son and a border knight rewriting basic combat forms together."
Lirael wiped her brow and glanced toward the main estate.
"Let them talk. The border does not care about rumors. It cares about who survives the next raid. Your method could save lives if it spreads."
Klein looked out across the grounds. Knights drilled in traditional forms, their mana flaring in bright but wasteful bursts. His own approach remained quieter, more precise.
The world of Melros valued power above all. Yet power without understanding wasted resources and lives. Lirael's practical experience proved the gap between noble theory and frontier reality. The approaching academy scouts would test more than talent - they would test adaptability.
And with Lirael as a willing partner, Klein now had both data and a bridge to practical application.
As the three walked back toward the main path, a servant hurried up with a sealed message. Adrian took it, scanned the contents, and frowned.
"Border report," he said quietly. "Minor raid two days ago. Raiders used unfamiliar mana bursts - stronger than usual, almost coordinated. Father is increasing patrols."
Lirael's expression hardened.
"That matches what I heard before coming here. Something is shifting out west. If your harmonics can help knights hold longer…"
She left the rest unsaid.
Klein filed the information away. New external pressure. New variables.
The system was expanding faster than expected.
He felt no anxiety. Only the steady certainty that each measured step brought clearer understanding.
The academy scouts were coming. Border threats were rising. And now a swordswoman who lived by steel had joined the experiment.
Klein allowed the faintest smile to touch his lips.
The rules were revealing themselves.
And he was only beginning to rewrite them.
To be continued...