The grain of mana—the "core" that Gill had fought so hard to condense—sat at the center of his chest like a single, steady, glowing coal. It was impossibly small, barely the size of a mustard seed, but its presence changed the fundamental geometry of his existence. It provided a fixed point, a solitary anchor in a world that had, until now, felt like a chaotic, swirling sea of drifting energy.
For three days, Gill did nothing but monitor the core. He treated his own biology like a sensitive piece of high-end laboratory equipment. He spent hours in silent meditation, measuring how the core reacted to the rhythmic thumping of his heartbeat, the expansion of his lungs, and even the chemical shifts in his blood after a meal. He discovered that the core wasn't a static battery; it was a living oscillator. It pulsed. It vibrated. It had a natural, measurable frequency.
On the fourth morning, the researcher in him couldn't wait any longer. It was time for an "Output Test."
He found himself in the manor's secondary kitchen, a cavernous room tucked away in the servant's wing. Usually, this place was a frantic storm of activity—maids scrubbing copper pots and cooks shouting over the sizzle of fat—but during the mid-morning lull, it was a sanctuary of cool stone and silence. The air smelled of rosemary and old hearth-ash.
In the corner of the room sat a heavy wooden table, scarred by decades of knife work. Beside it lay an iron-bound wooden crate that had been discarded after a shipment of spices from the coast. It was locked with a rusted, stubborn padlock—a massive, primitive thing made of pig iron. To any other child, it was an immovable object. To Gill, it was a perfect, low-stakes variable for his first experiment.
In this world, a traditional mage would likely try to blast the lock with a surge of fire or use mana to artificially engorge their muscles with strength to snap the shackle. Gill found those methods barbaric—inefficient wastes of energy. He had a different theory, one rooted in the fundamental laws of his previous life.
Resonance.
He knew that every physical object, from the smallest pebble to the largest star, had a natural resonant frequency. If you could match that frequency with enough precision and energy, you didn't need brute force to shatter it; the object would simply shake itself apart under its own internal tension. It was the principle that allowed a soprano to shatter glass, applied to the hidden mechanics of a medieval world.
Gill closed his eyes and turned his focus inward, centering his mind on the tiny, shimmering sphere in his chest.
Step One: Extraction.
He didn't try to "throw" the mana outward in a clumsy burst. Instead, he reached into the core with his will and pulled a thin, microscopic thread of energy upward. It was an agonizingly delicate process. The mana felt like a strand of white-hot silk being threaded through his nervous system. As he guided the current down his arm, through the narrow junction of his elbow, and into the pads of his fingers, his hand began to tingle. It was the sensation of a thousand pins and needles, a localized neuropathy that made his small hand cramp, but he ignored the discomfort. He was no longer a boy; he was a conduit.
He placed his hand firmly on the cold, pitted surface of the iron padlock.
Step Two: Frequency Scan.
"Don't think of it as a lock," he whispered to himself, his breath hitching. "Think of it as a lattice of iron atoms. A grid of vibrating particles held together by electromagnetic bonds."
He began to pulse the mana from his fingertips into the metal. He sent out tiny, rapid waves of energy, adjusting the speed of the pulses—faster, then slower—searching for the moment the metal would "answer."
For several minutes, nothing happened. To an observer, he was just a strange, silent five-year-old boy holding onto a piece of junk. But inside Gill's mind, he was scanning a spectrum. He shifted the vibration of his mana, moving through the frequencies he had painstakingly mapped out in his mental notebooks.
Then, he felt it.
A faint, ghostly vibration echoed back into his palm. It was a "return" signal, a subtle shiver in the iron that a normal child would have missed entirely. But to Gill's analytical mind, it was as loud as a cathedral bell. He had found the resonant frequency of the pig iron.
Step Three: Amplification.
"Now," Gill muttered, his brow furrowing as a bead of sweat rolled down his temple.
He didn't increase the amount of mana he was using. He didn't have much to begin with. Instead, he focused on precision. He matched the frequency of the lock exactly and began to push. He pumped the mana from his core in time with the lock's own natural vibration, building the energy higher and higher with every wave, much like a child pushing a swing at exactly the right moment to make it go higher.
The padlock began to hum. It was a low, thrumming sound at first, a vibration that traveled through the heavy wooden table and made the copper pots on the walls rattle.
Inside the lock, the iron atoms were being pushed to their breaking point. The internal stress was mounting, invisible to the eye but devastating to the molecular structure. Gill felt the drain on his core immediately. The tiny grain of sand in his chest was shrinking, its energy bleeding out into the metal. His vision began to blur at the edges, a familiar grey static of exhaustion creeping into his periphery.
Just a little more. Push the peak of the wave. Overwhelm the bonds.
Suddenly, the hum reached a piercing, metallic crescendo that vibrated in Gill's very teeth.
CRACK.
The iron didn't melt. It didn't explode into shards. The internal mechanism of the lock simply disintegrated into a fine, grey powder. The heavy iron shackle, now unsupported, snapped open and fell to the floor with a dull, heavy thud.
Gill slumped forward, his forehead resting on the cool, scarred wood of the table. He was panting, his small lungs burning as if he had run a mile, but he was smiling.
He had done it. He had bypassed the "miracle" of magic and gone straight to the physics. He didn't need the legendary strength of a knight or the roaring fire of a court mage. He only needed to know where the universe was weak.
The heavy kitchen door creaked open on its iron hinges. Halloway, the head butler, stepped inside. He was a man who prided himself on never being surprised, but he stopped dead as his eyes landed on the young master slumped over the table, surrounded by the shattered remains of a high-quality padlock and a pile of mysterious grey dust.
Halloway adjusted his pristine white gloves, his expression returning to its usual unreadable mask. "Young master Gill. I was under the impression you were meant to be in the east wing practicing your calligraphy this morning."
Gill looked up, wiping a smear of sweat and dust from his eyes. His face was pale, but his gaze was sharp. "I was... testing the structural integrity of the estate's security, Halloway. Calligraphy can wait; physics cannot."
The butler looked at the grey iron powder on the table, then back at the boy. He had seen many things in his forty years of service to the Valencrests—battle-hardened mages, warriors, and even minor royals—but he had never seen a five-year-old dismantle a master-crafted lock without a single scratch on his hands.
"I see," Halloway said, his voice as dry as old parchment. "In that case, I shall inform the locksmith that our 'security' has been found... lacking. Perhaps you should return to your room for a 'metabolic recovery period' before you decide to test the structural integrity of the front gates?"
Gill grinned weakly as he stood up, his legs feeling like jelly. As he walked past the butler, Halloway noticed something that made the hair on the back of his neck stand up. The boy's eyes weren't tired in the way a child's eyes usually were after a tantrum. They were bright, cold, and predatory.
As Gill climbed the stairs back to his room, he felt the tiny mana core in his chest. It was nearly empty, a hollowed-out shell, but it was already beginning to pull in the amber dots from the air, refilling itself automatically.
He had proven his first major hypothesis. Mana could interact with the physical laws of his old world. It was a sub-layer of reality that could be manipulated with math.
But as he reached the top of the stairs and looked out the window, the view gave him pause. From this height, the horizon should have begun to curve, a familiar arc he had known in his first life. But here, the world simply... went on. Vast plains gave way to forests that bled into mountain ranges so distant they were mere smudges of purple, and yet the line where the sky met the earth remained as flat and straight as a ruler's edge. It was an expanse that defied logic, a world so massive it made his home feel like a speck of dust on an endless map.
For a moment, a chill that had nothing to do with the drafty hallway washed over him.
If he could use resonance to break a lock... what could a master of this power do to a world this vast?