On the third day, Cael put his fist through a mountain.
Not literally. But the Hermit had set up a target at the far end of the Hollow—a slab of compressed stone two meters thick, reinforced with gravity-bonded steel mesh, the kind of barrier the OA used to protect high-value installations. The slab was grey and brutal, its surface scarred from previous tests, its edges bolted to the cavern floor with anchors designed to withstand orbital bombardment. A full six-orbit Impact specialist could crack it. An eight-orbit could shatter it.
Cael vaporized it.
The Impact orbit had stabilized overnight. Where yesterday it had been a wild spray of gravitational force—unfocused, untamed, dangerous to everything within thirty meters—today it was a lance. Focused. Narrow. Devastating. The transition had come during sleep, his Core recalibrating itself while his body rested, the channels finding a new equilibrium.
He stood thirty meters from the target. His feet were planted, his breathing steady, his arms at his sides. He didn't raise his hand or make a gesture. He simply pushed—a thought, a direction, a gentle squeeze of the place in his chest where Impact lived.
The air between his hand and the slab compressed visibly. A cone of distortion like heat shimmer made solid, rippling outward from his palm to the target. The slab didn't crack or shatter. It simply ceased to exist in its current form—the molecular bonds holding it together overwhelmed by gravitational force, its matter scattering into a cloud of particles so fine they hung in the air like mist, glittering in the work lamps like a cloud of diamond dust.
The wall behind the slab cracked. A deep, jagged fissure raced up its surface, sending a shower of rock fragments onto the floor. The wall behind that cracked—a second fissure, parallel to the first, the stone groaning in protest. A tremor ran through the Hollow's floor, and dust fell from the ceiling in thin, grey streams.
"Well," the Hermit said. His monitors were going haywire—alarms flashing, waveforms spiking, red text scrolling across the screens. "That was more than one percent."
Cael lowered his hand. It was shaking. Not from effort—from the ease of it. He'd barely pushed. A thought, a direction, a gentle squeeze of his Core, and two meters of reinforced stone had turned to dust. The effort had felt like lifting a cup of water. The result had been a small earthquake.
"How strong was that?" he asked.
The Hermit studied his readouts. His three-fingered hand moved across the keyboard, pulling up data, cross-referencing, calculating. His expression was carefully neutral, which Cael was learning meant he was deeply unsettled.
"The baseline for a six-orbit Impact specialist is approximately forty kilojoules of directed gravitational force. An eight-orbit peaks around ninety. Sera Kane, the strongest twelve-orbit Orbiter I've ever scanned—the one they call the Inquisitor—generates roughly three hundred at maximum output." He paused, his pale eyes fixed on the overloaded sensor data. "And that?"
"Eight hundred." The Hermit's voice was flat. "Approximately. The sensors overloaded before they could get an exact reading. The margin of error is significant because we no longer have functioning sensors in that quadrant." He looked at Cael over the top of his cracked monitor. "You've had Impact for two days."
The implications hung in the air like the stone dust.
---
"It's the channels," the Hermit continued, half to himself. He was recalibrating his equipment, replacing fried sensors, muttering calculations under his breath. "Thirteen channels sharing the resonance load. Each orbit benefits from the harmonic of all the others. It's not additive—it's multiplicative. Every new orbit you unlock doesn't just add power; it amplifies everything you already have."
"Is there a limit?" Lyra asked from her watching post. She'd moved to a different boulder after the tremor, one that seemed more stable. Her Hindsight was active, scanning for falling debris.
"Yes." The Hermit didn't look up from his work. "Physics still applies. His Core can still overload. His body can still break. The energy has to go somewhere, and if it exceeds his capacity to channel it, he'll—" He stopped. His hand hovered over a sensor. "He'll shatter. Not metaphorically. His Core will fracture catastrophically, releasing all thirteen channels at once. The resulting gravitational pulse would be... significant."
"Define significant," Lyra said.
"City-killing." The Hermit's voice was quiet. "If he shatters while underground, the collapse would destabilize the tectonic plates beneath Gravitas. The city would sink. Not slowly—immediately. Like dropping a stone into mud."
Cael felt the blood drain from his face. "So if I lose control—"
"Don't lose control." The Hermit finally looked at him. His pale eyes were very serious. "The OA doesn't know you exist as a thirteenth-orbit Orbiter. If they did, they wouldn't try to capture you. They'd try to destroy you—from a distance, with weapons designed to overload Cores. Because the risk of you shattering accidentally is too high."
"They'd rather kill me than risk me breaking the city."
"They'd rather kill a hundred people to save a million. That's how power works." The Hermit turned back to his monitors. "Which is why we're going to spend the rest of the day on precision. Not power. You have enough power. Now you need control."
---
They spent the day on precision.
The Hermit set up increasingly delicate targets: a glass bottle at fifty meters, a stack of cards at thirty, a single sheet of paper pinned to a wall at twenty. Cael had to hit each one with exactly enough Impact to move it without destroying it.
The glass bottle shattered on the first three attempts. The first time, he hit it too hard—the bottle exploded, spraying glass fragments across the cavern floor. The second time, he hit it at the wrong angle—the bottle spun and cracked against the pedestal. The third time, his focus slipped and the Impact wave went wide, shattering a different bottle that the Hermit had been saving for later.
"You owe me that bottle," the Hermit said.
"I'll put it on my tab."
On the fourth attempt, Cael closed his eyes. He activated his Sight—not to see the bottle, but to feel it. Its weight. Its density. The precise amount of force required to overcome its inertia without exceeding its structural integrity. He layered his Weight orbit beneath the Impact, using it to create a gravitational gradient that would cushion the blow.
He pushed. Gently. Precisely.
The glass bottle slid sideways across the pedestal—intact, unmarked, its contents sloshing gently.
"Good," the Hermit said.
The cards scattered wildly twice before Cael managed to topple the stack neatly, like a tower of dominoes. The first time, his Impact wave was too broad—it caught the edge of the stack and sent cards flying in every direction. The second time, he overcorrected and hit the stack too low—the bottom cards slid out and the whole thing collapsed in a heap.
The third time, he saw it. Not with his eyes—with his Core. The precise gravitational signature of each card, the way they were stacked, the balance points, the weak spots. He pushed with a force so fine it was almost imperceptible, aimed at the exact center of the stack's weight distribution.
The cards toppled in a perfect cascade, each one falling onto the one below it, forming a neat, orderly pile.
Lyra applauded. "Show-off."
The paper was the hardest.
Impact wanted to be violent—it was a martial orbit, designed for combat, calibrated for breaking bones and shattering walls. Asking it to be gentle was like asking a hammer to perform surgery. Every time Cael tried to push the paper, his Impact wave was too strong, too broad, too eager. The paper tore. The paper shredded. The paper disintegrated into a cloud of fibers that drifted through the cavern like snow.
But Cael found that if he layered his Weight orbit beneath the Impact—using Weight to set a precise gravitational gradient and Impact to provide the force—he could achieve control that neither orbit offered alone.
Weight created a path. Impact provided the push. Together, they became something new—a channeled force that moved exactly as he directed, no more, no less.
The paper fluttered off the wall. It drifted through the air in a slow, graceful arc, turning end over end, and settled on the floor of the Hollow like a falling leaf.
"Orbit integration," the Hermit murmured, making notes on his battered datapad. His three-fingered hand moved in quick, precise strokes. "He's already combining channels. Weight and Impact, working in harmony. That normally takes months of practice. Sometimes years."
"Or he's just talented," Lyra said.
"Talent is the wrong word." The Hermit's stylus paused over his notes. "His Core is designed for this. Thirteen channels, all resonating together, each one amplifying the others. The architecture of his orbital system isn't human-standard—it's something else. Something optimized." His pale eyes narrowed. "The question is: optimized by whom? Evolution? The Gravity Fall? Or the First Core himself?"
The question settled over them like a cold draft.
---
"Does it matter?" Cael asked.
He was sitting on the floor, breathing hard but grinning—actually grinning, the expression unfamiliar on his face, pulling at muscles that hadn't been used in years. His uniform was soaked with sweat, his hands were raw, his Core ached with the effort of the day's work. But he had turned stone to dust and moved paper with a thought, and for the first time in eleven years, he felt powerful.
"Whoever designed it, it's mine. And I'm going to learn to use every piece of it."
The Hermit studied him. His pale eyes moved across Cael's face, reading something that wasn't on the monitors. "You're enjoying this."
"I spent three years as a janitor believing I was broken." Cael's voice was quiet, but there was steel underneath it. "I had four useless orbits and a cracked Core and I couldn't do anything but mop floors and try not to be noticed. I was invisible. I was nothing." He looked at his hands—the same hands, but different now. He could feel the potential in them, the compressed power of thirteen channels humming beneath his skin like a second heartbeat. "Now I can turn stone to dust with a thought. Yeah. I'm enjoying this."
"Enjoy it carefully." The Hermit's voice was sharp. "Power without control is what the First Core had. It's what tore a hole in reality. It's what killed your parents and Lyra's parents and hundreds of thousands of others. Enjoyment is fine. Arrogance will get us all killed."
The grin faded. Not entirely—but enough.
"Control," Cael said. "Right. More paper targets?"
"More paper targets."
---
By evening, Cael could peel a sheet of paper off a wall from across the Hollow without tearing it, fold it in mid-air using layered gravitational fields—Weight to hold it steady, Impact to create the creases, Touch to feel the texture through the distance—and set it down on the Hermit's desk with the precision of a surgeon placing a suture.
The paper was a crane. A simple origami shape, wings spread, head lifted. It stood on the Hermit's desk like a small, white bird, its edges crisp, its folds perfect.
The Hermit looked at the crane. Then at the boy who'd made it. Then at the data on his screens showing power outputs that shouldn't be possible from a seventeen-year-old with two days of training.
"Good," he said.
From the Hermit, it was the highest praise imaginable.
Lyra picked up the crane. She turned it over in her hands, her dark eyes tracing the folds. "You made this from across the room? With your mind?"
"I made it with my orbits. Weight to hold it, Impact to fold it, Touch to feel the paper's texture, Sight to see the density." Cael shrugged, trying to look casual, failing completely. "It's just integration."
"Just integration," Lyra repeated. She set the crane back on the desk. "You're terrifying."
"Thank you."
"It wasn't a compliment."
"I'm taking it as one."
The Hermit cleared his throat. Both of them turned.
"You've made remarkable progress," he said. "But we have a problem."
He turned one of his monitors so they could see. The screen showed a map of the undercity—a complex web of tunnels and chambers, marked with the Hermit's annotations. A red dot was blinking in the upper levels, moving slowly but steadily downward.
"Kane," Cael said.
"Magistra Sera Kane. She's been moving through the undercity for two days. She's not searching randomly—she's following something. A trace. A gravitational signature that matches yours." The Hermit zoomed in on the map. "She's using a technique I've never seen before. Residual echo tracking—reading the gravitational memory of the stone to follow your path."
"She can see where I've been."
"She can see where you've been, how long ago, and possibly—based on the strength of the echo—how powerful you were when you passed." The Hermit's voice was grim. "Every time you use your orbits, you leave a mark. A gravitational fingerprint that fades over time. Kane can read those fingerprints. She's been tracking you since the tower."
Cael stared at the blinking red dot. It was still in the upper levels—but it was moving. Slowly, methodically, inexorably.
"How long until she finds us?"
"At her current rate? Three days. Maybe four." The Hermit leaned back in his chair, his machines adjusting around him. "She's being cautious. She knows you're powerful—she's seen the residue in the tower closet. She's not rushing in. She's hunting. Slowly. Carefully. Giving you time to make mistakes."
"What do we do?"
The Hermit was quiet for a long moment. His pale eyes moved from the monitor to Cael's face, then to Lyra's, then back to the monitor.
"We prepare," he said. "You have three more orbits to unlock before you're ready—Edge, Binding, and Refraction. After that, you'll have basic functionality in seven of the twelve channels. Not full mastery—but enough to fight if you need to."
"Fight Kane?" Lyra's voice was sharp. "She's a twelve-orbit Inquisitor. She's been trained since childhood. She's killed people with more experience than Cael has days."
"Which is why we're not going to fight her." The Hermit's voice was calm. "We're going to survive her. There's a difference."
Cael looked at the blinking red dot. At the crane on the desk. At his own hands, still trembling slightly from the day's effort.
"Three days," he said.
"Three days," the Hermit agreed.
"Then we'd better get started."
He stood. His legs ached, his Core throbbed, and the whisper was stirring again in the back of his mind. But he stood anyway.
"Edge," he said. "The cutting orbit. Teach me."
The Hermit nodded. He pulled up a new set of training protocols, and the Hollow's sensors recalibrated for a different kind of force.
Lyra moved to Cael's side. Her shoulder brushed his—warm, solid, present.
"Somewhere," she said quietly.
"Somewhere," he agreed.
The red dot blinked on the screen.
And in the tunnels above them, Magistra Sera Kane followed the echo of a boy who had put his fist through a mountain.