I had this idea when I was eating dinner, so I wrote it.

I'm so sorry I haven't updated in so long, but with everything that's going on recently, this hasn't really been my first priority...

It's kind of like a "part two" to the Draco meets HTTYD one I wrote for EchoTheHybrid

Takes place during The Half Blood Prince

HTTYD characters are from the post HTTYD 2 timeline, so Stoick is gone but the dragons didn't leave yet.
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Draco Malfoy stared at the Vanishing Cabinet in front of him, praying that it will work this time.  Previously, he'd sent apples and birds through the Cabinet throughout the process of mending it, though none came back unharmed.  He rubbed his eyes tiredly and let out a shaky breath.

He can do this.  He had to do this.

He refused to let himself break, as the last time that happened, he ended up in the hospital wing because Harry Potter had found him crying in Moaning Myrtle's bathroom and nearly killed him after they dueled for a short while.  It was thanks to Professor Snape arriving in time that he survived.

There was a bird, fluttering around in the cage that sat on a table behind him.  Draco carefully opened the cage and coaxed the bird onto his palm.  He really hoped that the Cabinet worked this time since the last bird he sent through had come back dead.

He set the bird in the Cabinet gently and closed the door.  Almost immediately, he could hear the frantic fluttering of wings as the bird struggled to find a way to escape the Cabinet.  Blinking to make the stinging in his eyes go away, he pulled out his wand and pointed it at the Cabinet.

"Harmonia Nectere Passus." he chanted softly, over and over, until the fluttering sound stopped.

Draco opened the Cabinet doors and was slightly happy to see that it was empty.  Now, he only hoped that the bird returned unharmed and alive.

Shutting the doors, he chanted the spell again.  The whole time, he prayed that it worked, though at the same time, he didn't want it to.

He heard the fluttering again after chanting the spell for five minutes straight.  With his heart in his throat, he opened the door, half expecting to see the bird twitching and flopping around inside.

That wasn't the case.

The bird flew out past him, twittering and chirping as it disappeared behind a pile of junk.

Draco nearly cried.  It worked, which meant that the biggest and most horrid part of his task was fast approaching.

The night before the final part of his task, he couldn't sleep.  He had this feeling that everything was going to go wrong.  Then again, this whole situation could go wrong very easily.  He was letting a bunch of murderers into the school, it really can't get worse than that.

Draco waited until everyone in his dorm room had left for classes before he dressed and headed to the Room of Requirement.  He wasn't concerned about missing classes, as there would be no point in going back after his task was completed.

He stood in front of the Cabinet and waited.  That's all he had to do now.  Then, he'll open the doors when the Cabinet shows signs of containing someone or something.

Time seemed to crawl by at a snail's pace, and Draco busied himself by mentally preparing for the next part of the task.  When the Cabinet started to shake slightly, he pushed away anymore lingering doubt in his mind and opened the doors.

There was no going back now.

Cautiously, Draco peered into the Cabinet, expecting some Death Eaters to jump out, but there was no sign of movement from any living thing.

He wondered if he'd mended it properly.  It should've worked, considering that the bird returned unharmed and alive, so why weren't the Death Eaters arriving?  Were they waiting for the Dark Lord himself to arrive as well?

Just as he was contemplating his life choices, he noticed a subtle glint in the darkness of the Cabinet.  Steeling his nerves, Draco leaned into the Cabinet and was suddenly met with a pair of glowing green eyes.

Letting out a shout of surprise, he scrambled backwards and fumbled with getting his wand out of his pocket.  He shakily pointed it at the pair of glowing eyes, suddenly remembering when he was serving detention in his first year and how he encountered an axe-wielding lady and her pet dragon in the Forbidden Forest.  The lady's dragon had glowing eyes as well, though they were yellow, not green.

Perhaps this was a dragon as well.

Draco barely had time to let that thought run through his head before a scaly, black head poked out of the Cabinet.  The head was followed by a reptilian-like body with wings folded at its side and fins on the tail.  His eyes widened with surprise and fear.  It was a dragon, though it was unlike any he's ever seen.

He kept backing up as the dragon crawled out of the Cabinet until his back hit a pile of random stuff behind him.  Then, he wondered how the dragon fit into the Cabinet.

He mentally slapped himself.  He's on a mission, to do something terrible, and he encounters a dragon, and the first thing he thinks of is: how the actual heck did the dragon fit in the Cabinet?  Then again, one tends to lose their ability to think coherently when faced with a dragon that just crawled out of a cabinet.

The dragon, however, had decided to sit on its haunches and stare at him.  It made no moves to attack, nor did it show that it was a threat.

Draco felt like he could trust this dragon.

He mentally slapped himself again.  The hell is wrong with me, he thought.  I can't trust this dragon!  What if it's a test?  Sent by them?

He eyed the dragon with suspicion and hesitantly lowered his wand.  If this dragon was here he might as well show that he meant no harm.  He didn't want a repeat of his first year detention dragon encounter.

The dragon crooned softly when it saw that he put his wand away.  The corners of its mouth twitched, as if it was trying to smile.

Draco wasn't sure of what he should make of this, so he gave the dragon a small smile, despite feeling very stupid for doing so, and hoped that it'll maybe leave him alone.

The dragon did no such thing, instead, it practically pounced on him and licked his face repeatedly.  He managed to get away and used his wand to clear himself of the dragon slobber.

"Don't ever do that again." he hissed.  The dragon cocked its head and turned to look at the Cabinet.

"Please, by all means, go!" Draco said harshly, gesturing to the Cabinet.  "I have important things to attend to!"  Well, I do if killing Dumbledor counts as "important".  Where are the others, anyways?  Maybe they died.  Nah, my luck isn't that good for that to happen...

To his surprise, the dragon headed towards the Cabinet and seemed as if it was going to leave.  Draco let out a sigh of relief.  Dangerous or not, he didn't need a dragon being the reason why he couldn't complete his task.

"Why did you bring me here, bud?  We're supposed to be meeting Dagur and Mala on Berserker Island." a voice said from the direction of the Cabinet.

"Stormfly, why did you follow Toothless?" came a female voice.  "We were supposed to be keeping out of trouble."

Draco whirled around and brandished his wand at the people who spoke.  The first thing he saw was that dragon.  It was sitting beside an auburn-haired boy with a prosthetic leg, a blonde girl with a double-edged axe slung across her back was closing the Cabinet doors, and a blue and yellow dragon stood beside her.  He immediately recognized the blue dragon as the one from his first-year detention.

"You're the axe lady!" he blurted out without thinking and the girl looked at him with confusion.  "Is your dragon here to kill me again?  What about the black one?  Is it here to kill me, too?  Did he send you?"  His face paled as he processed that thought.  "Oh, Merlin, he did.  I'm sorry, I need more time!  I promise I'll--"

"We're not here to kill you." the boy said.  "Why would we kill you?"

Draco was taken back.  "Because you're Death Eaters?" he asked.  "And because I...failed."

The boy and girl exchanged looks while the dragons decided that the piles of junk in the Room of Requirement is an endless bounty of stuff to chew and play with.

"We're not, er, Death Eaters." the girl said.  "We're dragon riders.  I'm Astrid, and this is Hiccup."  She gestured to the one-legged boy.

"The involuntary contraction of the diaphragm?" Draco asked in confusion.  "Was the person who named you right in the head?"

The boy, Hiccup, stiffened and looked like he swallowed something unpleasant.  Astrid gave Draco an awkward smile.  "Eh, maybe don't say things like that?" she suggested.  "It's a...touchy subject."

Draco knew all about touchy subjects; the Dark Mark hidden under his sleeve being one, so he left it alone.

"If you're not Death Eaters, then why are you here?" Draco felt a bit more at ease, but he still didn't let his guard down.  "Did you happen to be browsing Borgin and Burkes and decided that you'll hide in the closet?"

"No," Hiccup said, seeming to have recovered from his--whatever it was, from before.  "Toothless was following something, kind of like when we all got lured to Melody Island, and everything got darker until we came out here."

"We're telling the truth." Astrid said, seeing Draco's unconvinced expression. 

"We really have no idea how we got here." Hiccup added.

"You know, this reminded me of that time I ended up in the creepy forest." Astrid said to Hiccup.  "I had no idea how I ended up there, either."
"And then, you saw this kid who used a stick to shoot red sparkles." he said.

Draco flushed with embarrassment.  If he had any problem with believing them, he didn't now.  For sure they were telling the truth, because the way they described that specific event was exactly how he remembered it.  "That...was me." he mumbled.  "I was serving detention."

If the two were shocked, they didn't show it.  Instead, they started wandering around the area near the Cabinet, taking time to look at everything while Draco just stood there awkwardly, not sure of what to do.

"Hey, this crown is pretty." Astrid said, her voice carried over a pile of random stuff.  "It's even shaped like a bird."

"The craftsmanship on this is amazing." Hiccup said.  There was some clattering, as if someone was moving things around.  "The intricate details and carvings, whoever made this must be a great crafter."

Draco decided that the two "dragon riders" posed no real threat, so he turned back to the Cabinet.  Almost in a half-hearted, joking kind of way, he chanted Harmonia Nectere Passus a few times while keeping his wand trained on the tall wooden structure.  He thought that the two Dragon Riders arriving was a mistake and the Cabinet still needed to be mended some more.

What he didn't expect was that at some point, the Cabinet door opened slightly, when he was pretty sure that Astrid had closed it.

He checked that the two were out of sight before he pulled the door completely open. 

His blood ran cold when his aunt Bellatrix stepped out, followed by Fenrir Greyback; the werewolf, and the other Death Eaters.