The world narrowed down to a circle of dim, blood-red light.
Outside that circle was the crushing darkness of the mine, the shifting shadows of the Void, and the terrifying weight of a mountain hanging over our heads. Inside the circle, there was just a boy, a dead leg, and a knife.
The air in the cavern was thick, pressing against my skin like a wet wool blanket. It tasted of sulfur, old copper, and the sweet, sickly scent of rotting fruit. It was a smell I knew from Miren's compost heap—the smell of things breaking down into dirt—but here, it was coming from a person. It coated the back of my throat like oil, making me want to gag with every breath.
Kian lay on the dirt floor, his chest hitching with shallow, ragged breaths. His skin was the color of old parchment, translucent and grey, stretched tight over his cheekbones. The sweat on his forehead was cold.
I looked at his leg.
It was a nightmare. The heavy timber beam had crushed it days ago, shattering the bone and pulping the muscle. But the injury wasn't the problem. The problem was the black stain spreading up from the calf.
It wasn't a bruise. It was rot. The flesh was black, swollen, and shiny. Purple veins spiderwebbed out from the dead tissue, reaching up his thigh like roots seeking water. They were pulsing in time with a heartbeat that was too slow, too heavy.
"Lysara," I said. My voice sounded flat, strange in the tight acoustic space of the rock. "Check the leg. Can you fix it?"
Lysara knelt in the dirt on the other side of the boy. Her face was pale, reflecting the red glow of the Heat-Stone I had set on a flat rock. She was an Elf; healing was part of her blood, written into the Song she had been born with, even if she was a scholar first and a healer second.
She took a deep breath, centering herself. I saw her hands trembling, but she forced them to still.
"The bone is crushed," she whispered, hovering her glowing hands over the black, swollen flesh. "It is... a mess. But the structure... I can knit the bone. I can sing the flesh back together. It is a matter of realigning the flow of life."
She closed her eyes. She began to hum—a low, vibrating note that sounded like wind moving through dry leaves. It was the Song. The Silver Seam gathered around her fingers, weaving a soft, pulsating green light. It looked like spring rain.
She pushed the magic into Kian's leg.
HISS.
The reaction was violent.
The moment the green light touched the black rot, the rot flared. It didn't heal. It lunged. The black veins on Kian's skin expanded instantly, sucking the green light in greedily like dry earth drinking rain. The rot seemed to boil, bubbling up under the skin.
Kian screamed.
It wasn't a human sound. It was a wet, gurgling shriek that arched his back off the hard ground. His eyes rolled back, showing the whites, then the solid black of the Void-Touch.
"Stop!" I shouted, grabbing Lysara's wrist and yanking her back.
The connection broke with a snap. The green light vanished. The black rot pulsed, looking darker, stronger, more alive than before. It had eaten her spell. It had used the healing energy to feed the infection.
"What happened?" Lysara gasped, clutching her hand to her chest as if she had been burned. She looked terrified, her violet eyes wide. "The structure... it collapsed. The magic didn't bind. It was like pouring water into a grease fire."
"It's Void," I said, looking at the wound with my Sight.
Through the lens of my ability, I saw the truth. The rot wasn't just dead tissue; it was a colony of anti-magic. It was a hunger.
"It's hungry," I said. "You tried to feed it light, Lysara. It just ate it. You made it stronger."
I looked at the rot. It was buzzing now, energized by Lysara's attempt. The black lines were creeping faster up his thigh, moving past the knee, moving toward his hip. Toward the main pump. Toward his heart.
"Ren," Kaela said, her voice tight. She was holding Kian's shoulders, keeping him from thrashing. "You do it. You have the... the other magic. The Hollow. Can you pull the rot out?"
I looked at my hands. They were trembling.
I knew how healing worked. I had watched Miren do it a hundred times. I could see the weave of the spell Lysara had tried to cast. I knew exactly how to stitch the nerves and seal the bone with magic. I had the Skill to execute the perfect spell.
But I had the wrong fuel.
I looked inside myself. The Hollow was full of the Ward's energy—cold, heavy, defensive magic. And underneath that was my own nature. The Void. The cold. The hunger.
If I poured my energy into Kian, I wouldn't heal him. I would freeze him. I would turn him into a shadow-thing. I would finish the job the mine had started.
"I can't," I whispered, the words tasting like ash. "My magic is cold. It's poison to him."
"So we can't heal it," Kaela said, looking at the boy. "And the rot is moving."
"We can't fix it," I said.
I reached for my belt. The leather creaked as I drew Toren's hunting knife. The steel scraped against the sheath, a harsh, metallic sound that echoed in the quiet cave. The blade was dark grey, folded steel, sharp enough to shave with.
"So we have to remove it," I finished.
Silence filled the cavern. The only sound was Kian's ragged, wet breathing and the distant drip of water somewhere in the dark.
"Cut it off?" Lysara whispered. She looked at the knife, then at the leg. "Amputation? Here? In the dirt?"
"It's the only way," I said. "The rot is magic. The knife is steel. Steel doesn't feed the Void. If we separate the rot from the boy, the boy lives."
I looked at Kian. He was awake now, his eyes wide and black, staring at me. He had heard. He knew what the knife meant. He looked at the leg pinned under the beam—the leg that was already dead, a black weight dragging him down into the grave.
"Do it," he whispered. His voice was like dry leaves scraping together. "It hurts. Make it stop."
"I will," I promised.
I stood up. I walked a small circle in the tight space, trying to force my brain to stop being a ten-year-old boy who liked building forts and start being a mechanic who had to fix a broken engine.
It's just a machine, I told myself. Broken parts. The strut is snapped. The fuel line is corrupted. Remove the broken part to save the engine.
I looked at my friends. They were terrified. They were looking to me for orders.
"Kaela," I said. "Hold his shoulders. Put your weight on him. Do not let him move. If he moves, I cut the wrong thing, and he bleeds out in thirty seconds."
Kaela swallowed hard. She looked green in the firelight, but she nodded. She moved behind Kian's head, pinning his shoulders to the dirt with her knees. She grabbed his hands, interlacing her fingers with his.
"I got you, kid," she said, her voice surprisingly gentle. "Look at me. Don't look down. Look at my eyes. Keep looking at my eyes."
"Lysara," I said. "Don't heal him. Freeze him. Just ice. Numb the meat. Create a barrier of cold right here."
I drew a line with my finger across Kian's thigh, about four inches above the visible rot.
Lysara nodded, tears standing in her eyes. "I can do that. Ice slows things down. I can hold the pain back."
She placed her hands on Kian's thigh, well above the rot line. Frost bloomed from her fingers, turning the skin white and hard. Kian gasped, then relaxed slightly as the biting cold killed the burning pain of the rot.
I took the Heat-Stone in my left hand. It was a smooth river rock, carved with the friction rune. I had designed it to keep my hands warm in the snow. Now, I needed it to be a forge.
I pressed the blade of Toren's knife against the rune.
I fed mana into the stone.
Hum.
The stone grew hot. Then hotter. Then white-hot.
Hiss.
The steel of the knife blade turned angry orange. The heat radiated against my face, drying the sweat on my forehead. The smell of ozone and hot iron filled the air.
I needed it hot. Not to cut, but to burn. To cauterize. To seal the tubes so he didn't die of blood loss before I finished.
I took a breath. The air felt thin.
I needed to know where to cut. I couldn't just hack at him.
I closed my eyes for a split second. I dug into my memory.
Miren's workshop. The bottom shelf. The heavy grey leather book with the skeleton embossed on the cover.
I had read it when I was five, sitting on the floor while Miren mixed potions. I remembered the drawings. The intricate maps of the human body. The red lines for blood, the white lines for nerves, the white pillars for bone.
I opened my eyes. I activated the Infinite Skill.
I didn't see a boy anymore. I saw a schematic. A blueprint made of flesh and fluid.
Snap.
I overlayed the memory of the book onto the reality of the leg. The Skill filled in the gaps. It showed me the density. It showed me the pressure.
I saw the rot. It wasn't just a color; it was a texture. The flesh below the knee was soft, dead, mushy—like rotten fruit. The flesh above was tight, inflamed, fighting the infection.
I saw the "plumbing." The femoral artery—the big tube carrying blood down the inside of the thigh under high pressure. If I cut that without sealing it, he would be dead before I took my next breath.
I saw the nerves. The white cords that carried the pain.
I saw the bone. The femur. The structural strut. It was splintered under the beam, but solid above.
I had to cut where the meat was still good.
"Ready?" I asked.
"Ready," Kaela whispered. She tightened her grip on Kian's hands.
I put the glowing knife to the white, frozen skin.
I pushed.
The sound was the worst part. It wasn't a clean slice; it was a wet sizzle. The sound of a steak hitting a hot pan. The smell of cooking pork filled the small cave instantly, thick and greasy. It mixed with the smell of the rot, creating a stench that made my stomach heave.
Kian screamed.
It was a raw, animal noise that tore his throat. The ice numbed the skin, but it couldn't numb the deep tissue. His back arched off the ground, fighting Kaela's grip.
"Hold him!" I roared over the scream.
"I'm trying!" Kaela gritted out, putting her whole weight on him. Tears were streaming down her face. "Ren, hurry! He's dying!"
I didn't hurry. Hurry meant mistakes. Hurry meant cutting the wrong tube.
I moved the knife. I cut through the muscle. I remembered Miren cutting venison in the kitchen—follow the grain, Ren, don't saw at it. Use the blade.
I sliced. The heat of the blade burned the small tubes shut as I went, creating a wall of charred flesh that stopped the blood before it could flow.
Smoke rose up, stinging my eyes. My stomach lurched, threatening to empty itself, but I clamped it down.
You are not a boy, I told myself. You are a tool. You are a saw.
I cut deeper.
I found the femoral artery. The main line. It was pulsing against the blade, thick and full of life.
I stopped cutting. I turned the knife flat. I pressed the hot steel against the artery.
Ssssss.
It sealed. A crude, ugly weld of flesh.
I checked the flow. No blood spurting. Good.
I reached the bone. The knife stopped. Steel wouldn't cut the femur. It was the hardest bone in the body.
I pulled the blade back. It was smoking, covered in black char and grey ash.
"The bone," I muttered. "I need... I need force."
I looked at the rock Kian was lying on. I looked at the heavy iron pry bar I had carried down from the surface to move the boulders.
"Kaela," I said. "Cover his eyes."
"Ren, what are you—"
"Cover his eyes!"
She shifted one hand to cover Kian's face, pressing his head into her chest so he couldn't see what was coming.
I grabbed the pry bar. It was heavy, rusted iron. Cold in my hand. A tool for breaking rocks.
I looked at the thigh bone. The book said it was stronger than concrete. But the Infinite Skill showed me the flaw. The way the leg was twisted under the beam put stress on the shaft. Tension.
If I hit it right...
I didn't want to do this. I wanted to run. I wanted to go home and hide under my bed and pretend I was just a kid who liked to build towers. I didn't want to be the boy who broke another boy's bone with an iron bar.
But the rot was waiting. And the rot didn't care about what I wanted.
I raised the bar.
I aimed.
I swung.
CRACK.
The sound echoed in the cavern like a gunshot. A wet, snapping sound that I knew I would hear in my nightmares for the rest of my life.
Kian went limp. He stopped screaming. He stopped moving.
"He's dead!" Lysara shrieked, pulling her hands away from the leg as if she had been electrocuted.
I dropped the bar. I checked his neck. A pulse. Fast, thready, but there.
"He's asleep," I said, my voice shaking so hard I could barely form the words. "Passed out from the pain. Keep freezing the leg! Don't let him bleed!"
I grabbed the knife again. I heated it on the stone until it glowed white.
I cut the last strands of muscle. I sealed the weeping flesh with fire.
The leg—the dead, black thing—fell away.
It lay on the dirt, separated from the boy. It looked like a piece of trash. A broken part discarded from a machine.
I dropped the knife. I fell back on my heels, gasping for air. The cavern spun. The red light of the Heat-Stone blurred.
"Is it... done?" Kaela whispered. She was still holding Kian, rocking him slightly.
I looked at the stump. It was an ugly, charred mess. But it wasn't bleeding. The black rot was gone, left behind in the severed limb.
"It's done," I croaked.
I looked at my hands. They were covered in soot and blood.
I scrambled away, into the corner of the cavern, and retched. Nothing came up but bile.
I sat there, shaking, staring at the dark.
I did that. I butchered him.
"Ren," Lysara said softly.
I looked up. She was checking Kian's neck again.
"His heart is beating," she said. "It's fast, but it's strong. You saved him."
"I took his leg," I whispered.
"You traded a leg for a life," Kaela said. Her voice was fierce, though her eyes were red. "That's a good trade. That's a warrior's trade."
She stood up. She took off her cloak and draped it over Kian.
"We need to move," she said. "The explosion. Dawn."
I looked at the entrance to the cavern. The ventilation drift we had squeezed through.
"How?" I asked. "He can't walk. We can't drag him through the rubble."
"We carry him," Kaela said. "We make a... a carrier."
"A litter," Lysara supplied. "A stretcher."
I forced myself to stand. My legs felt like jelly. The Hollow was dangerously low on fuel—the surgery, the stress, the heat I had poured into the stone. I was running on fumes.
I looked around the cavern. There was debris everywhere. Broken planks from the shoring beams.
"Rope," I said. "We use the rope and the cloaks."
We worked fast. We were terrified, sick, and exhausted, but the fear of the dawn kept us moving.
We took two sturdy beams. We threaded them through the sleeves of our wool tunics—turning the clothes into a sling. It was crude, but it would hold a ten-year-old boy.
We lifted Kian onto it. He groaned but didn't wake up.
"Leave the leg," I said, looking at the severed limb on the ground.
"We should burn it," Lysara said, shivering. "The rot... the Void... it's spreading."
She was right. The black veins on the dead leg were moving. They were reaching out into the dirt like roots, seeking a new host.
I grabbed the Heat-Stone. It was still hot.
I tossed it onto the dead leg.
"Burn," I commanded.
I poured the last dregs of my mana into the stone. It flared white-hot. The dry cloth of Kian's pant leg caught fire. The rot hissed and shriveled.
We turned toward the exit.
Kaela took the front of the stretcher. I took the back. Lysara led the way with her staff, casting a faint light spell to guide us.
The climb up was harder than the climb down.
We had to maneuver the stretcher through the twisted tunnels. We had to lift it over rockfalls. Kian was dead weight, heavy and awkward.
My arms burned. My back screamed.
"Steady," I gasped as we reached a steep section. "Don't tip him."
"I'm trying," Kaela grunted. Sweat was dripping off her nose. "He's heavier than he looks."
We reached Level 2.
The air changed.
The stillness of the mine broke. A low growl echoed from the tunnel ahead.
We froze.
"Did you hear that?" Kaela whispered.
"Wind?" Lysara hoped.
"No," I said. "That wasn't wind."
I lowered the stretcher gently. I drew Toren's knife. It was still warm, stained with char.
"Something is here," I said.
The shadows ahead of us shifted. They weren't just shadows anymore. They were gathering. Thickening.
A shape stepped out of the dark.
It was a wolf. But not a scavenger wolf like the ones in the woods.
This thing was huge. The size of a pony. Its fur was matted with black slime. Its eyes were burning violet holes in the dark. And its jaw... its jaw was unhinged, hanging open to reveal rows of needle-sharp, glass-like teeth.
A Void-Beast. A Scout.
It sniffed the air. It smelled the blood on my hands. It smelled the fresh trauma of the surgery.
It looked at us and licked its chops with a tongue that looked like a black worm.
"It's blocking the exit," Kaela whispered, raising her sword. Her hand was shaking. She was injured, tired, and carrying a boy. She couldn't fight this.
Lysara raised her staff. "My magic... it feels weak here. The beast is eating the air."
I stepped forward.
I was empty. I had no fuel for the boost. I had no heat left to burn.
But I had the Hollow. And the Hollow was starving.
"Take the stretcher," I said to Lysara. "You and Kaela. Move when I say move."
"Ren, you can't," Kaela hissed. "You're empty."
"I'm not empty," I said, staring at the beast. "I'm just making room."
The beast snarled. It crouched, muscles coiling under the wet fur.
It charged.
It moved like liquid shadow. Fast. Too fast.
I didn't run. I didn't dodge.
I opened the gate. Wide.
I didn't try to pull heat. There was no heat here. Only cold. Only Void.
I pulled the cold.
I pulled the very thing that made the beast what it was. I drank the darkness.
It hit me like a physical blow. Ice water in my veins. The world turned sharp and grey.
My vision cleared. I saw the beast not as a monster, but as a collection of energy. A knot of purple threads tied together by hate.
It leaped at me.
I caught it.
I grabbed its throat with my left hand and its shoulder with my right. The impact should have broken my bones. But I wasn't bone anymore. I was the Void.
I slammed the beast into the wall.
CRUNCH.
The stone cracked. The beast shrieked—a sound like tearing metal.
It tried to bite me. Its teeth scraped against my arm.
I didn't feel pain. I felt hunger.
I squeezed.
"Mine," I whispered. Not with my voice, but with the voice of the Hollow.
I drained it.
I didn't filter. I didn't sieve. I drank the poison straight.
It tasted like power. It tasted like ruling the world. The black veins on my arms exploded outward, racing up to my neck, across my face. My eyes burned.
The beast withered. Its fur turned to grey dust. Its muscles turned to ash. Its violet eyes dimmed, flicker, and went out.
It crumbled in my hands.
I stood there, holding a pile of dust. I was buzzing. Vibrating. I felt strong enough to punch through the mountain.
I turned to look at my friends.
Kaela and Lysara were staring at me. They weren't looking at Ren. They were looking at the thing standing in the dark with glowing purple eyes and black veins pulsing on its face.
"Ren?" Kaela whispered.
I took a breath. I forced the gate shut. I forced the hunger down.
"Go," I rasped. My voice sounded like grinding stones. "Run."
They grabbed the stretcher. They ran up the tunnel, past me, past the pile of dust.
I stayed behind for a second. I looked at my hands.
The black veins were fading, but they were slower this time. They didn't want to leave. They liked being out.
I clenched my fists.
I am the King of the Dark, I told the monster inside. And you do what I say.
I turned and ran after them.
We had a boy to save.