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In Sickness and Flame

Summary:

When a scouting mission exposes the dragons to a deadly poison, their riders set out in search of an antidote—only to return bruised, bloodied, and hunted. With no time to recover, the riders split up to protect their dragons, luring danger away while their partners lie helpless. But when the sounds of battle ring through the forest, each dragon rises—sick, staggering, and furious—to protect the fragile humans who would bleed for them. Because no matter the cost, dragon and rider will always fight for each other.

Notes:

(See the end of the work for notes.)

Work Text:

The dragons had never expected to love so fiercely. Once wild, once feared, once alone—now they were tethered by choice, by fire-warmed affection, to their riders. Not masters. Not commanders. Just… friends.

Toothless had never known kin until Hiccup. The boy was small, weak in body, but impossibly bright in soul. He taught Toothless how to trust again—how to wait for a hand instead of snapping at it. And now, Toothless didn’t let Hiccup out of his sight. Not for long. Not since that fall from the sky that cost them both everything and gave them something more.

Stormfly, ever sharp-eyed and sharp-taloned, had once lived for the wind and the chase. But Astrid had taught her the beauty of loyalty—the way it felt to circle back instead of flying on. Now, if Astrid was late returning from a mission, Stormfly's wings twitched with tension. No enemy had ever made her fear like absence could.

Hookfang was fire incarnate. Snotlout was obnoxious, loud, and often reckless. But he cared—he cared in his own lopsided way. And somewhere between the arguments and the boasting, Hookfang realized Snotlout would stand in front of a dragon for him. So Hookfang had decided no one would ever touch his rider unless they wanted to burn.

Meatlug adored Fishlegs with the warm, slow love of something ancient and kind. She felt his heart when he spoke to her, patient and soft, unlike any Viking she had known. She’d crush mountains before she let that gentle soul be harmed.

Barf and Belch didn’t always understand Ruffnut and Tuffnut, but they felt them—the twin chaos, the unbreakable thread between them. The dragons kept their two-legged counterparts out of trouble more often than they’d admit.

They had all become guardians of fragile creatures with soft skin and sharp wills. And though the dragons could fly faster, breathe fire hotter, and roar louder, they had become protectors of beings far more breakable than they had ever been.

 

The mission had seemed simple. A scouting flight near the cliffs of the southern ridge, to investigate why a small colony of dragons had fallen ill. The riders had brought supplies and curious eyes. The dragons had come in force. The flowers had been beautiful—blue oleander, clustered like stars in the grass. The scent had been sweet. The breeze had carried it. And then, they began to fall. Toothless was the first. A stumble mid-flight. A crash on the sand. Then the others—Stormfly’s wings folded in agony. Meatlug collapsed with a low whine. Hookfang trembled as if chilled from the inside out. They were dragons—used to pain, used to battle. But this was different. It was in their lungs, their blood, their fire. They were grounded, shivering, wheezing. The riders had panicked. Fishlegs shouted about toxicity. Hiccup demanded water and shelter. Astrid barked orders through tears. And then—then they left.

“We’ll come back,” Hiccup had said, eyes darting between his friends. “We need to find the antidote.”

It took all the dragons’ strength not to follow. But they were too sick to move. For the first time in years, they had to let their humans go alone. The ground had never felt so heavy.

 

The sun rose. But it did not bring them back. Toothless was the first to stir, though he hadn’t truly slept. His head had rested on a stone, wings folded awkwardly against his aching sides, but his ears had twitched with every breeze, every rustle that wasn’t Hiccup. When the sky turned pink and gold and still held no sound of wings—not his wings, not the flapping of Hiccup’s leather flight suit—his stomach turned. Something was wrong. Something had been wrong. And it was getting worse. Stormfly hissed softly in her throat, her eyes fixed on the horizon. She had stood at the ridge since the first morning light, unmoving. She had memorized the sky in every shade, every shifting cloud. And none of it brought Astrid back. Barf and Belch wandered. Not far—they didn’t have the strength for that. But they took turns pacing and then collapsing, then standing again as if stillness was worse than poison. Ruff and Tuff were late. And late meant lost. And Barf and Belch didn’t know what to do with that kind of silence. Meatlug lay curled on her side, wheezing, though she had stopped trembling. Her tail thumped against the ground in quiet protest with every hour that passed. She watched the edge of the clearing where Fishlegs had last stood, trying to smile through his own terror as he promised to be back “soon.” Hookfang growled under his breath, body tense, teeth clenched. He hadn’t moved since sunrise—hadn’t blinked, hadn’t eaten, barely breathed. His eyes locked on the sky, refusing to look at the other dragons, refusing to admit what fear was clawing into his chest.

They should be back. They had said it. Promised it. Stormfly screeched once—sharp and sudden—as a bird passed overhead. Her wings flared. Hope. For a moment. But the bird was just a bird. Not Astrid. Not the girl who had laughed when Stormfly first bumped her with her nose. Not the warrior who braided her hair with feathers and kissed her snout before battle. Stormfly tucked her wings in tight again and didn’t make another sound.

The heat of the day began to rise, and with it, a kind of silent despair.

Toothless crept to the spot where Hiccup had vanished into the trees. He sniffed the earth. Searched for footprints. Anything. But the trail was cold, and his nose was still too clogged from the poison to catch a scent. He stared at the woods for a long time. As if he could summon Hiccup back just by believing hard enough. But belief didn’t part branches. Didn’t carry the sound of footsteps. Didn’t fix the ache in his chest. The sun hit its peak. And then it began to fall again. Still no riders. No voices. No laughter. No clumsy, annoying, beautiful humans with soft hands, soft hearts and softer skin.

Toothless returned to the others. Stormfly met his eyes. They didn’t need to speak. They were thinking the same thing. What if they’re not coming back?

Meatlug whimpered quietly. Barf and Belch stopped pacing. Hookfang let out one long, guttural growl that faded into a broken snort. Not quite a roar. Not quite anything. Just grief, still trying to stay angry because anger was easier than sorrow. Toothless curled into a tight ball. Not to sleep. Just to hide the way his body trembled—weak from the poison, but also from something worse. Dragons weren’t supposed to wait like this. Dragons were meant to fly into storms and crash through trees and burn away fear. But this fear couldn’t be burned.

They couldn’t fly. They couldn’t move. They couldn’t protect. All they could do was wait. And they hated waiting. Because every heartbeat without their riders felt like the world was pulling further and further away—like maybe the sky would never carry them back. And the worst part? The humans had gone to save them. And they might have died doing it.

 

The sun had dipped low when the silence finally broke. It wasn’t the call of a wild bird or the rush of wind. It was heavier. More frantic. Footsteps.

Toothless lifted his head first, ears swiveling. His body ached, vision blurred, but that sound—that sound—was familiar. He struggled upright, wings dragging uselessly behind him. Stormfly let out a hopeful trill, too hoarse to be loud, and the others stirred. Then came the figures—staggering, broken, bloody silhouettes against the trees.

Hiccup was limping, one arm tucked against his side, clothes torn and soaked with both blood and sweat. Astrid was beside him, face pale but jaw tight. Fishlegs clutched a heavy satchel to his chest like it was life itself. The twins leaned on each other, dirt-streaked and limping, Tuffnut clutching a deep wound along his ribs. Snotlout came last, sword drawn even though he was barely standing, his free hand pressed to a bleeding gash across his brow.

They had returned. Not whole, but alive. And carrying hope.

“We’ve got it!” Hiccup called out, voice rough, cracking. “It’s not much, but—”

He collapsed to his knees before Toothless. “I wasn’t going to let you die,” he whispered.

One by one, the riders reached their dragons.

Fishlegs had to fight to keep his hands from shaking as he poured the antidote into Meatlug’s mouth, whispering her name between trembling breaths. Meatlug nudged him with her snout before the effects even set in, as if to say you came back. He sobbed into her neck.

Astrid held Stormfly’s face in her hands, voice tight with pain as she fed her the bitter-smelling liquid. “I’ve got you, girl. Just hold on a little longer.”

Stormfly couldn’t lift her wings, but her tail twitched weakly, and she blinked slowly in understanding.

Snotlout cursed as he tried to get Hookfang to drink, half-laughing, half-crying. “Don’t you die on me, lizard. You’re not allowed to die before me.”

Hookfang growled faintly in response—his way of accepting the insult as affection.

Ruff and Tuff tipped Barf and Belch’s heads up at the same time, joking about who would pass out first. “Bet your side goes down before mine,” Ruffnut muttered. Tuffnut chuckled. “Bet we both go down together. As usual.”

But then something shifted in the forest behind them. The sound of snapping branches. The heavy crunch of boots on leaves. A shout. Then another. Dragon Hunters. They had followed them. They were close. Too close.

“They tracked us,” Hiccup breathed, eyes darting. “We don’t have time. The antidote needs—what? An hour?”

Fishlegs nodded desperately. “Maybe more. They’re too weak to move. They won’t survive a fight.”

The dragons tried to rise, to roar, to defend. But they couldn’t. Not yet. So the riders looked at each other, at their dragons. And then they moved. Without a word. Without hesitation.

Astrid pressed a kiss to Stormfly’s beak. “Don’t move until you feel strong.”

Snotlout whispered something into Hookfang’s ear that sounded like a promise.

Hiccup leaned his forehead against Toothless’. “Wait for me.”

Then they ran.

Each one in a different direction, drawing noise, breaking branches, shouting to lure the hunters away.

Barf and Belch tried to get up, to follow, but collapsed again with twin groans. Meatlug whimpered. Hookfang snarled in frustration. Stormfly’s eyes burned with fury, her body trembling from the effort to move.

Toothless didn’t try. He just stared after Hiccup—at the forest that had swallowed him again. He felt the danger. The riders were bleeding, unarmored, and alone.

They weren’t like dragons. They couldn’t take an arrow and keep flying. They couldn’t breathe fire. They couldn’t survive long like this. But they had chosen to protect them, again. As always. And now the dragons could only wait, poisoned and helpless, knowing that the humans who had come back to save them might not return this time.

Toothless dragged himself closer to the spot where Hiccup had vanished. He didn’t know if the antidote was working yet.

But he knew this: The second he could fly again… He would.

 

 

The forest was quiet for only a moment. Then the screams began. Not cries of fear. Battle cries. Pain. Clashing steel. The thunder of pursuit.

Toothless’ head shot up at the sound of Hiccup’s voice—sharp, desperate, breathless. His wings twitched uselessly, his muscles still sluggish and numb. But the sound of his human in danger cut through the fog of the poison like a blade. Hiccup was fighting. Alone, and losing.

Stormfly growled low in her throat, her crest flaring as Astrid’s scream echoed from the north ridge. Not fear. A war cry. But there was a strain in it, a falter that Stormfly knew too well.

Meatlug's ears flattened against her skull. She heard Fishlegs shouting her name—not in comfort, not in panic, but as if he thought he was dying and wanted to say goodbye.

Hookfang’s head lifted at the same time a sickening crunch of fists and bodies rang through the trees. Snotlout yelled something defiant, and then something pained. Hookfang bared his teeth. Not again. Not again.

Barf and Belch froze mid-twitch, then snarled at once. Ruffnut's shrill voice rang out in the distance—mocking the enemy, still fighting like a firestorm—but there was a gasp that followed. Tuffnut’s voice broke with panic.

The dragons didn’t think. They moved.

Stormfly stumbled first, her legs dragging like dead weight, wings limp at her sides. But she pushed forward. One step. Then another. Then a run—Astrid. Astrid. Astrid.

Toothless roared—a hoarse, broken thing—and launched himself forward. He nearly fell, but caught himself with a snap of his tail. The poison still burned in his veins. His vision blurred. But he could smell Hiccup’s blood on the wind. That was enough.

Hookfang exploded into motion, wheezing smoke, every step a jolt of agony. But his claws dug deep into the earth, carving his path toward the sound of Snotlout’s cursing. You flaming idiot, he thought. You’re not dying until I say so.

Meatlug followed the scent of ash and leather, of Fishlegs and the tears in his voice. She moved like a boulder rolling downhill. Slow at first. Then faster. Nothing would stop her now.

Barf and Belch lunged in opposite directions, then tangled, then untangled, then found a rhythm. Ruff and Tuff were out there, getting hurt. And they belonged to them.

The forest didn’t know what hit it.

Poisoned dragons, wounded and staggering, tore through the underbrush like dying stars refusing to burn out. Trees splintered. Ground shook. The poison hadn’t left their blood—but it couldn’t touch their hearts. Not when their riders were bleeding. Not when the bond that tied them together was screaming for action.

 

Toothless found Hiccup first. He crashed into the clearing like a shadow made real—black wings tearing the air, teeth bared in primal fury. Two dragon hunters had cornered Hiccup, who stood braced, panting, blood trickling from a cut above his eye. His sword was broken in half.

The hunters turned, too late. Toothless roared. Even sick, even slow, he was faster than death. He didn’t blast plasma. He tackled. Tore. Bit. The hunters screamed. Ran. Fell. And did not get up again.

Toothless didn’t stop until Hiccup was safe behind him. He wobbled. Almost collapsed. But then Hiccup touched his side.

Hey, Bud,” Hiccup whispered, stunned.

Toothless just leaned into him, one wing curling protectively around his fragile, soft-skinned human.

 

Stormfly landed like a thunderclap beside Astrid, scattering the group of hunters who had been circling her. Astrid had one axe left, and it was slick with blood. She turned toward the crash, eyes wide.

“Stormfly—? You’re—”

Stormfly shrieked, and Astrid didn’t need the words to understand: You are mine, and I will not let them touch you again.

Astrid stumbled backward into her dragon’s wings. Stormfly spun, her sickened body trembling with rage, and unleashed a flurry of razor spikes. Even weakened, even dizzy, she fought like the storm she was named for.

 

Hookfang found Snotlout trying to crawl, one arm hanging uselessly, blood streaming from his side. A hunter raised a blade above him. Hookfang hit the man with the force of a meteor.

Snotlout blinked up through blood-stung eyes. “Took you long enough, you flaming—”

Hookfang roared, cut him off, and curled around his rider like a wall of living flame. He growled low: Next time, you wait for me.

 

Barf and Belch launched through the trees, slamming a group of hunters aside as Ruff and Tuff stood back-to-back, bruised but grinning.

Meatlug crashed through a campfire and knocked three men flat, sliding to a stop with Fishlegs crawling into her open arms.

They were still sick. But they were together now. And even sick, a dragon at their rider’s side was stronger than any army. They stood in pain. They fought through haze. They held the line. Because their humans had risked everything to save them. And now it was their turn.

 

 

 

 

Toothless growled low, a deep, steady rumble that vibrated in his chest. He bleeds too easily, the sound meant. He fell. I saw it. His leg gave out and he didn’t tell me.

Stormfly chirped in response, her crest twitching. She stitched her own wound. Astrid wouldn’t let me touch her until it was done. She smiled when I cried. The chirp ended in a frustrated trill. She lies with her face, so I won’t worry.

Hookfang let out a sharp snort, embers puffing from his nostrils. Snotlout said he had everything under control. Then he fainted trying to carry me. Foolish hatchling. His voice trembled, but he still yelled like he was in charge.

Meatlug rumbled, a slow and mournful tone that lingered in the air. Fishlegs tried to shield me with his own body. His arms are too small. His skin tore open like paper.

Barf and Belch hissed and snapped at each other before Belch finally settled into a grumble. The twins laughed when they limped back, as if pain were a game.
Barf answered with a quieter whine. But I heard them, in the dark. Ruffnut cried when she thought Tuffnut was asleep. She said her ribs still burned.

They all fell into silence again. The fire popped.

Toothless paced in a tight circle, tail twitching, eyes glowing a dull green. He stopped only to look at Hiccup—his human. His friend. His everything.

They are not made to break things, he growled at last. They are made to feel too much. And still they went into danger. For us.

Stormfly nodded. They knew what the hunters would do. They ran into it anyway. Because we could not move. They didn’t even hesitate.

Hookfang let out a huff, quieter now. What if they hadn’t come back?

The question hurt more than the poison ever had.

Toothless sat, wings drooping, eyes locked on the slow rise and fall of Hiccup’s chest.

Then I would have burned the world, he said.

There was no growl in it. Just truth.

We have always been their protectors, Stormfly murmured. We circle them, shield them, fight beside them. But they are not meant for war like we are. They are light, and laughter, and fragile things.

And they chose to save us, Meatlug added, her voice like the earth after rain. Even when it hurt.

Hookfang flicked his tail toward the fire. They don’t heal like we do. Their skin will scar. Their bones will ache. But still, they smiled at us.

The dragons looked at their riders again. They were not just riders anymore. They were family. They had held the line when the dragons could not. They had bled and limped and crawled back home with nothing but stubborn love keeping them upright.

Stormfly shifted closer to Toothless, curling her tail around her talons. We must grow sharper eyes. Quicker wings.

Meatlug nodded. Stronger hearts.

Better fire, Hookfang added.

Barf and Belch didn’t speak, but they each lowered their heads until their snouts touched Ruff and Tuff’s sleeping forms.

We will protect them, Toothless growled, soft but final. They’ve earned that.

And with that, the dragons moved—one by one—closer to their humans. Curling around them, tucking wings like blankets, chins resting near chests, tails drawn in circles around fire-worn bodies.

Notes:

So I rewatched that one episode that the dragons get sick and I thought "what if the dragons got sick on a mission and the riders had to fight for them?" So, I made it happen and this fic is the outcome!