The Hermit was a brutal teacher.
"Again," he said.
Cael stood in the center of the Hollow, sweat running down his face in rivulets, his arms trembling with a fatigue that went beyond muscle-deep. His uniform was soaked through, clinging to his skin like a second layer, and his breath came in ragged gasps that echoed off the cavern walls. Around him, the evidence of the morning's work: three cracked impact targets, their surfaces spiderwebbed with fractures; a collapsed section of reinforced barrier, the metal twisted and torn; and a small crater where the floor used to be level, the stone pulverized into a fine grey dust that clung to everything.
"I can barely stand," Cael said.
"Good." The Hermit's voice was flat, unyielding. "Your Core is weakest when you're exhausted. If you can control your orbits when you're about to fall over, you can control them anywhere." He tapped his monitor, where Cael's Core signature flickered in erratic spikes. "Now push."
Cael extended his right hand. The motion cost him—his shoulder screamed, his elbow locked, his fingers trembled. He tried to channel his Weight orbit—the most familiar of his four active abilities, the one that let him adjust the gravitational pull on objects, making them heavier or lighter at will. He focused on a stone the size of his fist, sitting on a target pedestal twenty meters away. Grey, rough-textured, unremarkable. Just a rock.
He pushed.
The stone didn't move.
Instead, the wall behind it exploded outward in a spray of rock and dust. The sound was enormous—a deep, concussive BOOM that shook the cavern floor and sent vibrations through Cael's teeth. A section of ceiling groaned, cracks racing across its surface like frozen lightning. Pebbles rained down, bouncing off Cael's shoulders, his head, the Hermit's monitoring station.
"You pushed the wall," the Hermit said flatly. "I asked you to push the stone."
"I was trying—"
"You're broadcasting." The Hermit's voice cut through Cael's protest like a blade. "Your Weight orbit is radiating in all directions like a bomb instead of focusing like a beam. You're hitting everything within thirty meters with the force meant for one object." He wheeled forward, his chair's motors whirring, his three-fingered hand gesturing at the shattered wall. "Your power is enormous, boy. That's the problem. You've got the engine of a warship connected to the steering system of a bicycle."
Lyra, sitting on a boulder near the entrance with her arms crossed, raised her hand. "Quick question. Should I be worried about the ceiling?"
The Hermit glanced up. The cracks were still spreading, slow but inexorable. "Probably."
"Great."
"Again," the Hermit told Cael. "But this time, don't push with your hand. Push with your intention. Your orbit doesn't care about your hand—it responds to your Core, not your muscles. Picture the stone. Only the stone. Feel its weight. Its density. Its specific gravitational signature. Then increase that signature by one percent."
"One percent?"
"You just put a hole in a reinforced wall from twenty meters trying to push a rock. Let's start with one percent."
Cael lowered his hand. His arm dropped to his side, limp and useless. He closed his eyes. The Sight orbit activated immediately—he could feel the cavern around him, every surface and object mapped in density, every weight laid out before him like a topographical map. The stone on the pedestal was there, its weight signature clear and distinct, a small, dense point in the otherwise diffuse field of the Hollow.
He focused on it. Only it. Let everything else—the walls, the ceiling, Lyra's steady heartbeat, the Hermit's machines—blur into background noise.
Then he pushed. Gently. One percent.
The stone trembled. Shifted. Slid three centimeters across the pedestal and stopped.
When Cael opened his eyes, the Hermit was almost smiling.
"That," the Hermit said, "is control. Now do it again. And again. And again, until you can move that stone to any position on that pedestal without touching anything else in this cavern."
Cael did it again. And again. And again.
His body screamed. His Core ached. The whisper stirred occasionally, offering observations that Cael ignored with increasing ease. But he kept going, because stopping meant admitting defeat, and defeat meant the OA had been right about him all along.
By noon, he could slide the stone in any direction with millimeter precision. Left, right, forward, back—the rock moved at his will, smooth and obedient, leaving no trace on the pedestal's surface.
By afternoon, he could lift it off the pedestal entirely, hovering it in a stable orbit around his hand. The stone circled his palm like a tiny moon, its weight signature perfectly balanced, its motion effortless.
By evening, he could do it while walking, while talking, while eating one of Lyra's protein bars with his other hand. The stone orbited him constantly, a silent companion, a testament to the control he was slowly, painfully building.
"Now the hard part," the Hermit said.
Cael stared at him. The stone halted in mid-orbit, hovering beside his ear. "That wasn't the hard part?"
"That was Weight. One orbit." The Hermit's pale eyes were unblinking. "You have twelve to unlock and integrate. Each one will fight the others for dominance until you learn to harmonize them. And every time you unlock a new one, the thirteenth channel will notice and push back." He paused, letting the weight of his words settle. "Every new orbit you claim is a battle. Against yourself. Against your Core's instinct to protect itself. And against the thing on the other side of the door."
The whisper stirred, as if on cue. He's making you stronger for them, not for you. When you're strong enough, they'll point you at the door and say 'jump.'
Cael ignored it. He was getting better at that. The whisper was still there, still watching, still waiting—but it no longer controlled his attention. He could feel its presence and choose not to engage.
"What's next?" he asked.
The Hermit almost smiled again. Almost.
"Impact," he said. "The orbit of force projection. Weight lets you adjust gravity on existing objects. Impact lets you create gravitational force from nothing and project it outward." He paused, and his voice dropped. "Try not to collapse the cavern."
---
He collapsed part of the cavern.
The first time Cael reached for Impact, his Core responded with a pulse of gravitational energy that hit the far wall like a cannon blast. The sensation was nothing like Weight—Weight was a gentle adjustment, a nudge, a whisper. Impact was a scream. It tore out of him without warning, without consent, a raw, undiluted expression of force that he hadn't known he was capable of generating.
Rock shattered. Dust billowed. The sound was enormous—a deep, structural BOOM that echoed through the tunnels for thirty seconds, bouncing off walls, returning in distorted waves. A section of the far wall simply ceased to exist, replaced by a cloud of pulverized stone and a deep, smoking crater.
Lyra had thrown herself behind her boulder, her Hindsight screaming warnings that had given her a three-second head start. The Hermit hadn't moved—his chair's gravity anchors held him in place, though his blankets were blown sideways, flapping like wounded birds.
"Interesting," the Hermit said, brushing dust from his monitors with his three-fingered hand.
"Sorry—"
"Don't apologize." The Hermit's voice was calm, almost clinical. "You just generated a force equivalent to a six-orbit Impact specialist on your first attempt. The problem isn't power. It's direction."
"The problem," Lyra said, emerging from behind her boulder with dust in her hair and a glare on her face, "is that he's going to kill us all before he learns to aim."
"Possibly," the Hermit agreed. "Which is why we practice."
They practiced. For hours.
Cael launched rocks across the cavern, their trajectories wild and unpredictable. He shattered targets that were meant to be moved. He cratered floors that had been level for millennia. And on one memorable occasion, he sent a shockwave upward that knocked a stalactite loose from the ceiling—a massive spear of stone, easily two meters long, that plummeted toward the Hermit's monitoring station with the inevitability of a falling star.
Lyra caught it.
Not with an orbit—with her hands. Her combat reflexes, honed by years of Hindsight-assisted fighting, let her intercept the falling stone before it crushed the monitors. She caught it, redirected it, sent it crashing into a corner of the cavern where it shattered harmlessly.
"Thanks," the Hermit said mildly.
"You owe me three favors now," Lyra replied, shaking out her hands.
"I'll add it to the ledger."
By the time the Hermit called a halt, Cael could direct a focused Impact blast at a target the size of a dinner plate from thirty meters. Not consistently—maybe one in three attempts hit the target cleanly, with the others spraying force in wide arcs that gouged the walls and sent Lyra diving for cover. But it was progress.
He sat on the floor of the Hollow, every muscle burning, his Core aching like a bruised organ. His hands were raw, his eyes gritty with exhaustion, his ears still ringing from the echoes of his own blasts. Two orbits in active use. Weight and Impact. The other ten still dormant, still compressed, still waiting.
And beneath them all, silent now but present, the thirteenth channel. The door ajar. The void on the other side, patient and hungry.
"Tomorrow," the Hermit said, "we work on your Sight. You've been using it passively—let's see what happens when you push."
"What if I push too hard?"
"Then we'll find out what the inside of a collapsing cavern looks like." The Hermit wheeled toward the exit, his machines following like obedient pets. "I suspect it's educational."
Lyra helped Cael to his feet. His legs barely held him—they trembled like wire under tension, and he had to lean on her shoulder to stay upright. She was smaller than him, but stronger than she looked. She didn't stagger under his weight.
"You did well," she said.
"I destroyed a wall."
"You destroyed a wall on purpose by the end. That's improvement." She steadied him as they walked toward the bunker, her hand firm on his arm. "The Hermit doesn't compliment people. The fact that he said 'interesting' instead of 'terrible' means you impressed him."
"He has a low bar."
"He has no bar. You're the first student he's had since..." She trailed off. Her jaw tightened. "Well. Since me."
They walked in silence through the corridor. The LED strips hummed overhead, casting their blue-white light on the smooth concrete walls. Cael's new Sight showed him the density of everything—the weight of the stone above, the impossible depth of the earth pressing down on their hidden world, the faint, flickering signature of Lyra's grief, still there, still heavy.
Everything heavy. Everything bearing down.
But his feet held. His legs held. His cracked, impossible Core held.
For now, that was enough.
---
That night, he dreamed of the First Core.
He knew it was the First Core because the figure in the dream had no face—just a smooth, pale oval where features should have been, like a mask waiting to be painted. The figure stood on the other side of a door that was cracked open just wide enough for light—or something like light—to spill through.
You're learning, the figure said. Its voice was the whisper, but louder now, more present. Good. You'll need to be strong.
For what? Cael asked in the dream.
For the choice you'll make. When you realize the three options are lies.
The Hermit wouldn't lie to me.
The figure tilted its head. The gesture was eerily human, and therefore more disturbing than anything else it could have done.
He's not lying. He's just wrong. He thinks the door can be closed. It can't. It can only be opened or held. And holding takes more strength than anyone has—except you.
Why me?
Because you're like me. We're the same, you and I. The only two of our kind in three hundred years. The figure stepped closer to the door, and Cael could see through the crack—not the void he'd expected, but something else. A garden. Green and gold and impossibly beautiful, with trees that bore fruit made of light and rivers that flowed with liquid starlight. I didn't open the door to destroy anything. I opened it to find something. And I found it.
What did you find?
Home.
Cael woke with the word burning in his chest. The whisper was silent, but the image of the garden stayed with him—the impossible beauty, the sense of peace, the longing that had radiated from the faceless figure like heat from a fire.
Home, he thought.
He didn't sleep again that night.
---
The next day, Sight.
"Push," the Hermit said.
Cael stood in the Hollow, his eyes open, his Sight orbit active. The cavern was laid out before him in density-maps and weight-signatures, every object distinct, every surface mapped. He could see the Hermit's failing Core, the dim ember at its center. He could see Lyra's grief, pressed against her chest like a stone. He could see the cracks in the walls, the weaknesses in the ceiling, the places where the cavern might collapse if he pushed too hard.
"Push harder," the Hermit said.
Cael pushed.
His Sight expanded. The density-maps grew sharper, more detailed. He could see the individual grains of stone in the walls, the microscopic variations in density that told the story of the cavern's formation. He could see the heat beneath the floor—the geothermal vents that powered the bunker, their energy signatures bright and pulsing. He could see the echoes—the residual density patterns of everything that had ever been in this cavern, pressed into the stone like fossils.
And then he saw her.
Not Lyra. Not the Hermit. Someone else. A figure standing at the edge of the cavern, her density signature clear and unmistakable. She was tall, with cropped dark hair and a jaw that could cut glass, and her Core was a blaze of light—twelve orbits, all active, all powerful, all focused on him.
Magistra Sera Kane.
She was here. Not in the cavern—not physically—but her signature was here, imprinted on the walls, on the air, on the very fabric of the Hollow. She had been here before. Recently. Tracking him.
Cael gasped and his Sight snapped back to normal. He stumbled, caught himself, looked around wildly.
"What?" Lyra was on her feet, her Hindsight active, scanning for threats. "What did you see?"
"Kane," Cael said. "She's been here. Her signature—it's in the walls. She's tracking us."
The Hermit's monitors spiked. His pale eyes went wide.
"How long ago?"
"I don't know. Days, maybe. But she's close. She's getting closer."
The whisper stirred, and this time, Cael didn't ignore it.
I told you, it said. They'll use you. They'll hunt you. They'll never stop.
Then I won't let them find me, Cael thought back.
The whisper was quiet for a moment. Then, almost gently:
You can't run from someone who sees the past.
Cael looked at Lyra. Her face was pale, her eyes fixed on the cavern's entrance as if she expected Kane to walk through it at any moment.
"She can't find us here," Lyra said. "The deep zones—the residual gravity—it hides us."
"She found the Hermit," Cael said. "She found this place. She just doesn't know we're here yet."
The Hermit was already typing, pulling up surveillance feeds, checking perimeter sensors. His machines beeped in alarm—not immediate threat, but something close. Something approaching.
"We have time," the Hermit said. "Not much. But some."
"Then we use it," Cael said. He turned to the Hermit, and for the first time, there was no hesitation in his voice. "Teach me the next orbit. Now."
The Hermit looked at him. At the boy who had been a janitor three days ago, who had killed three people with a power he didn't understand, who carried a thirteenth orbit that could save the world or end it.
"Edge," the Hermit said. "The orbit of gravitational cutting. Fine manipulation at the molecular level." He paused. "It's the most dangerous of the passive orbits. If you lose control, you don't just destroy a wall. You cut through anything."
"Then I won't lose control."
The Hermit nodded slowly. He turned to his monitors, pulled up the training protocols for Edge, and began.
Lyra moved to Cael's side. Her shoulder touched his—just briefly, just enough for him to feel the warmth of her through his uniform.
"Somewhere," she said quietly.
"Somewhere," he agreed.
The whisper watched.
And somewhere above them, in the tunnels of the undercity, Magistra Sera Kane followed the echoes of a boy who shouldn't exist.