Another HTTYD/Harry Potter crossover. This has nothing to do with my other two HTTYD/Harry Potter crossovers - Albus Potter and the Vikings and The Mischief Twins (if you want to read them, go ahead. They're on my bio).

Don't own Harry Potter or HTTYD (very obvious). Terms and conditions and disclaimers apply.

I've seen a fair bit about Harry Potter meeting the HTTYD peeps during the Triwizard Tournament. It was pretty much my original idea... but then I changed it after reading a few of Harry Potter crossovers. Enjoy! Please review!

On Berk, twelve days north of Hopeless, and a few degrees south of Freezing to Death, was a little Viking village. Located on the Meridian of Misery, which didn't seem interesting - maybe its dragon riders could be interesting indeed. Led by a wonderful Chief, and a Night Fury - the last of his kind - they were happy, and peaceful. But not always. A month before, Berk had suffered the full brunt of Drago Bludvist, a madman who wanted to control dragons, people and the world. They had recovered quickly, and their Chief - Hiccup Horrendous Haddock the Third - was bent on protecting his people, following what his late father Stoick the Vast said - "Protect your own." Hiccup was launching new training programmes to help defend Berk against another major attack. Everyone helped - dragon or Viking, whether they liked it or not.

"Okay, gang, let's see how good we are now, OK? V-formation!"

Hiccup, Astrid, Snotlout, Ruffnut, Tuffnut, and Fishlegs were flying in the air, with their faithful dragons. The sun was setting; the clouds made a colourful symphony of orange, blue and purple. Hiccup decided on doing a few formations before retiring for the night. Hiccup looked back - the V-formation was perfect. "Diamond formation... that's it!" Hiccup called out a few more formations until everyone got tired. Everyone descended onto a field that looked over the village of Berk. Hopping off Toothless, grinning, Hiccup called, "Awesome! You guys have tomorrow free, right?"

"Come on, Hiccup, give us a break!" called Fishlegs, patting his belt that contained cards of information about dragons. "You've been working us twice as hard as we usually do today!" Patting his Gronckle, Meatlug, he continued, "Meatlug and I are tired, aren't you, girl?"

"Let's play Twenty Questions!" suggested Ruffnut.

"Great idea! You are actually my sister!" grinned her brother, Tuffnut. "I start - how do you play Twenty Questions?"

Everyone ignored the twins. Astrid grinned and said, "Tomorrow, Hiccup?"

"Certainly, milady. Guys," Hiccup turned to his friends, "Drago or someone else as powerful as him could attack us again. We need to prepare."

"Overprotective," sang Snotlout in a mock pompous singsong voice. Then he spoke in his normal voice: "Oh, come on, Hiccup! All we need is ANNIHILATION! Then Drago will be screaming away and he'll never take another toenail into Berk, all thanks to me, Number One! And 1A," he added after Hookfang prepared to flame on him.

"Sure, but- Ah!" Hiccup was interrupted by a feeling of claws penetrating in his head. It was a tawny owl, hooting impatiently, fluttering around Hiccup, and Toothless, overprotective, tried to shoo it away, but the owl kicked Toothless's nose and kept on annoying Hiccup. An annoyed Toothless backed away, rubbing his nose angrily. Ruffnut, Tuffnut and Snotlout sniggered. Astrid tried to get it off, but failed, as it gave a small scratch to Astrid and a small cut to Hiccup, hooting more impatiently. "Get off me!" said Hiccup, with the cut now bleeding profusely.

"Hey, Hic, there's something on it's leg," Fishlegs noted. "Maybe it wants you to take it off."

Grumbling, Hiccup forcefully took the owl off its head, then took off a piece of parchment tied to its leg. The owl hooted once more, as if to say, I told you so! then dug its talons onto Hiccup's shoulders. Luckily for Hiccup, he was wearing his armour. He didn't want to know what would've happened if he didn't. There was a small flap at the front, but...

"Hiccup, read the back," Astrid said, with a hint of nervousness in her voice.

Hiccup turned to the back, and saw the words in black ink:

Mr. Hiccup Horrendous Haddock the Third

On a Field, Near the Village of the Isle of Berk

Isle of Berk

Meridian of Misery - Twelve Degrees north of Hopeless, few degrees south of Freezing to Death.

Hiccup first thought it was a prank.

"Ruff, Tuff, own up," he said firmly. "Did any of you two do this? Or both of you?"

Still sniggering, the twins shook their heads, "We'd love to teach an owl to do that, but no, we don't know how," smirked Tuffnut. Turning to his sister, he said, "Want to see who can do that to Barf and Belch first?" His sister grinned, and they began to argue. "Don't worry," Ruffnut 'reassured' as she took her brother's helmet and hit it on his head. "We still devote our lives to the trickster god Loki!"

"Loki!" her brother agreed happily.

"Hiccup, I think you're meant to open the flap," muttered Fishlegs. Hiccup nodded. Is this a joke? I have no idea what the heck this is about - hell, am I in trouble? What for? With trembling hands, he turned the envelop over and noticed a purple seal bearing a coat of arms: there was a lion, an eagle, a badger and a snake. There were strange words at the bottom of it: Draco Dormiens Nunquam Titillandus. "Well, that's weird? What language is that?" asked Fishlegs. Hiccup shook his head as he opened the flap and found another parchment. The message was also in black ink. Hiccup read aloud:

HOGWARTS SCHOOL OF WITCHCRAFT AND WIZARDRY

Headmaster: Albus Dumbledore

(Order of Merlin, First Class, Grand Sorc., Chf. Warlock - formerly, Supreme Mugwump, International Confed. of Wizards)

Dear, Mr Hiccup Horrendous Haddock the Third,

We have heard of your talent with dragons. However, this is not the reason we have contacted you.

Harry Potter is in danger. You are required to help us. We would be extremely grateful if you helped us.

Of course, Professor Dumbledore, Headmaster of Hogwarts, our school which provides wizarding education to our budding young magical students, will contact you in the morning. Please send your reply. Reply or not, we will be coming to your house, where the current leader lives - you of course. In the morning, at nine o'clock sharp, Albus Dumbledore will visit your home to discuss an urgent need.

Wishing all the best,

Minerva McGonagall,

Deputy Headmistress of Hogwarts

Hiccup froze. Fishlegs and Astrid gawked as well. "Well, that went well," joked Hiccup.

"Uh... that was weird," said Fishlegs. "Who sent it?"

"A woman - I think it's a woman named... Minverva... I mean Minerva... McGonagall," said Astrid. "Someone named Albus Dundlebore... never mind, Dumbledore... I should check my pronunciations... is coming in the morning. But what does she want?"

"I'm not sure," quipped Hiccup, a hint of annoyance in his tone. Snotlout had gone - by that he was being tossed in the air by Hookfang, and Ruffnut and Tuffnut gawked for a while, until Tuffnut said, "Uh, can I say that why are we standing like dumb people and staring with our mouths open? Is that right?"

"No it isn't, dummy," said Ruffnut. "Uh, why are you doing that anyway? Oh, and the bird's behind you, Hiccup."

Groaning, Hiccup turned and - the tawny owl was still behind him, trying to catch some insects scurrying around the grass. He hooted, as if to say, Mind your own business! then went back to hunting its meal. "Fine! Stay there if you want!" Then he turned back to the letter. Was this some kind of a joke? A prank or a punishment? Maybe both - a prankishment. Wizards don't exist... According to the Vikings, wizards were old guys who had pointy star hats, cloaks and robes too long for them, and a stick - was that called a wand? for performing magic, and fighting evil, but they were stories the Viking children told. Why, Hiccup had heard plenty of far-fetched tales when he was a young boy! They didn't exist. There But now, the sun was setting. The sky was beginning to turn black. Sighing tiredly, he slipped the letter and the parchment where he got it from, into his chest armour, where he also kept his map-book, full of maps and places he visited. He'd worry about that later. It was getting late. His mother was waiting for him.

"Bye," mumbled Hiccup absentmindedly as he activated Toothless's tailfin and they rode over Berk onto the path that led into the Chief's hut. It was nearing night now; Vikings had settled down to rest for the night and for the coming day. Opening the door, the young Chief planned not to tell his mother about the weird letter. But why was it still in his mind?

His mother Valka greeted him with "Hello, son" as he and Toothless entered the room. She was feeding Cloudjumper with a tub of fish. Smiling back, hoping his mother wouldn't notice his anxiety about the letter, he made his place to the table. He grabbed a plate of chicken and began to eat, pondering over his strange letter. Toothless jumped around the house playfully, finally ceasing his mischievousness when he saw a basket of his favourite fish. Valka noticed him and raised her eyebrows suspiciously. "Hiccup? Is there anything wrong?"

"No!" Hiccup replied sheepishly.

Valka looked at him. "You're hiding something."

"I'm not! Mum, I am just thinking-"

"About what? Why do you keep staring at your-"

"Fine, fine, you win. Today I got this strange letter. I'm not sure if it's a prank." She deserves to know, thought Hiccup, this Albus Dumbledore will be bombarding into her house too. He took out his letter, and the strange parchment with the strange coat of arms with the odd motto, and handed it to his mother.

Valka's fingers froze as soon as she saw the coat of arms. Hiccup swore she said, "I should have known." She read the letter carefully, even more nervously as she reached the bottom, and read it again. "Hogwarts," she muttered pronouncing it right, and she muttered more names on the letter, pronouncing them correctly and accurately: "Albus Dumbledore... wizards... Minerva McGonagall... this has something to do with the Order of the Phoenix..." she finally gave the letter back to Hiccup, thinking, What's an Order of the Phoenix? "There was an owl that came with this, right?"

Hiccup didn't question his mother, but he didn't know how mothers knew everything. "Yeah - Ow! Great, it is still here!" The tawny owl flew around the house, jumped on Cloudjumper's head and then made its way to Hiccup's room. "Fine! Fine! Stay there! Gods, why won't you go back home!"

Another angry hoot replied.

"Okay! I have no idea what the heck you said, but okay!" said Hiccup hotly. Then, calming down, he said, " Yeah, that is the owl that sent the letter." Then, looking at his mother's face, he added, "Mum, do you know about wizards?"

Valka nodded her head.

"Are they real?"

"Yes, Hiccup. They're real. I've... met some," said Valka nervously.

"What was it like?"

"You'll know when Albus Dumbledore comes tomorrow. Be safe, okay?" asked Valka, as if Hiccup was given a ticket to certain straight death.

"Um... yes?" Hiccup wasn't so sure. Why had his mother kept the secret that she knew and met wizards? What was the Order of the Phoenix? Was she involved with that? Hiccup washed those thoughts away for tomorrow, letter held more tightly in hand. He pushed the half-eaten chicken away from him, and stood from the table. "Guess I'll call it a night. Night, Mum. Come, Toothless!"

"Goodnight, Hiccup."

As Hiccup shooed the tawny Hogwarts owl away from his bed (and flew to his desk), he thought he heard his mother muttering about the Order of the Phoenix, Albus Dumbledore, and Hogwarts once more.

Knock, knock.

Knocks could be heard from the door. Hiccup rubbed his eyes sleepily, thinking, Toothless, what the heck, stop it, then yelped. It was still dawn. He turned and noticed Toothless snoozing on his 'bed'. Who would be knocking at this time and hour?

As soon as he got out of bed, he could hear the knocks getting louder. He thought of Albus Dumbledore - could he be calling now? But he knew nine o'clock in the morning didn't mean dawn. He put on his armour, patted Toothless gently to wake him, then made his way downstairs. He groaned slightly, when he noticed the owl. Heck, it was still there. Thoroughly annoying.

Surprisingly, Valka and Cloudjumper were already awake. She looked nervous, even though she said a cheerful "Good morning, Hiccup!" Valka pointed at the door. Taking deep breaths, Hiccup opened the door, and...

"Ah, you must be Hiccup! Nice to see you! I assume you are inviting me in..."

Hiccup thought that Albus Dumbledore (if he was Albus Dumbledore) was the most peculiar wizard he had ever seen (not that he had seen any). He was tall, thin and very old, judging by his long, silvery beard (longer than any Viking's beard. Vikings would be proud). Hiccup imagined this wizard tucking his beard into his belt, or his long robes, or his light purple cloak. His blue eyes were happy, cheerful and inviting, full of hospitality, even though it was Hiccup inviting him in. His strange glass eye things were shaped like half-moons, and a wizard's hat sat on his head. However, there were no stars. Just a plain black pointed hat. He wore high heeled buckled boots, and his smile was so warm and welcoming that Hiccup instantly let him in. Then Hiccup noticed in his right hand, there was a piece of parchment. In his left hand, was a stick - no, a wand.

So people with magic powers existed. What next? thought Hiccup jokingly. My long-lost sibling is found? My dad is still alive?

Hiccup felt like it was a good time to introduce himself. "I'm Hiccup Horrendous Haddock the Third, like you said, that's me." He shook his hand with Dumbledore. His squeeze was gentle. Hiccup gestured to his mother. "My mother, Valka-"

"Ah, Valka, nice to see you again!" Dumbledore pat her on the back. "Welcome back, welcome back."

"Thank you, Dumbledore."

"Oh, call me Albus." He turned to her son. "I am Albus Percival Wulfric Brian Dumbledore, and I am Headmaster of Hogwarts School of Witchcraft and Wizardry, a school where we teach the magical youth of today magical wizarding education."

Hiccup thought he was clicking things together. "Mum, are you a... magic person like... like him?" asked Hiccup. But then Valka shook her head, "No, Hiccup, I promise I'm not a witch, and your father wasn't a wizard," and a small voice at the back of Hiccup's mind said, "Shame. I would've been a wizard."

"No Hiccup, your mother is not a witch as she stated, she is full Muggle, and so is your father," explained Albus.

Hiccup was taken aback. "What did you call my mother?"

"A Muggle. You are a Muggle too. Muggles are what wizards call the non-magic folk of our world, but many other wizards in other countries tend to call them different things - take America, for example. They are called No-Majs. No Magic," finished Albus.

"Okay..." Hiccup said slowly. "I got your letter."

"You didn't reply?" asked Albus curiously, silver eyebrows raising.

"Sorry," Hiccup quickly apologised, then Albus chuckled. "I had a feeling this would happen even though you wanted me to come, so I came anyway! Don't worry, Valka, I deal with drinks," added Albus as Valka readied a jug and three cups. Albus turned and noticed the two dragons, Toothless and Cloudjumper, who eyed the Headmaster suspiciously. "Amazing! These are dragons, right? I thought you... killed them." Albus' tone turned grave.

"Changed for the best sir," said Valka. "Changed for the best, and... events happened."

"You had eventful months, didn't you too?" asked Albus as Valka nodded. "Why, the Triwizard Tournament was only a year ago, and my my, it had four dragons galore! Hungarian Horntail, Welsh Green, Chinese Fireball, and Swedish Short-Snout. That was clearly eventful for Hogwarts!" Dumbledore laughed, while Hiccup thought, More new dragons? Fishlegs will have a heart attack... but how does this man know my mother's name? He sounds like he knows Dad too...

"Oh yes, the drinks," remembered Dumbledore, then he turned to Hiccup. "Would you like to see some magic?"

"Okay..."

Dumbledore waved his wand, and three tankards with frothy liquid appeared on the table with a CLUNK. "Madam Rosmerta's finest quality Butterbeer, straight from the Three Broomsticks. I advise you that they are very delicious."

Hiccup took his tankard, Valka took hers, and Albus took his. "To Muggles and wizards," he toasted. Hiccup and Valka copied him, and they drank together. Hiccup loved Butterbeer from the very start. It was delicious and it warmed him up inside. The strange thing was though - the tankard kept on magically refilling itself as soon as Hiccup emptied it and took in the last drop. Hiccup, however, did not complain. Wizards make good drinks... He grinned. "I love this drink... what was it called? Oh yeah - Butterbeer. It's definitely better than Astrid's yaknog."

"Well, we get started to business, shall we?" asked Albus as he placed his tankard on the table and it automatically filled up to the brim with more Butterbeer. "You got my letter did you?"

Hiccup grimaced. "Yeah. You should pick a better owl, though." He pointed at the owl, who was hooting sharply. Then, noticing Dumbledore with recognition, flew to his shoulder. "Ah," he said, "he does seem to get a bit bad-tempered if you don't take the letters off his leg immediately. Okay. But first, I must start on wizards."

"I thought the letter was a joke." Hiccup was still attempting to absorb the fact that wizards and witches existed.

"Did you? However, you are Muggles, so... first, we must start on Lord Voldemort."

"Who?" asked Hiccup. "What a strange name, and Viking parents name their children hideous names to frighten off gnomes and trolls." He chuckled as he continued, "As if our Viking demeanour wouldn't do that." But he stopped chuckling when he saw his mother, who was shivering with fear. "He Who Must Not Be Named?"

"Come on, Valka! Fear of a name increases fear of the thing itself." Then Albus turned to Hiccup. "Well, Hiccup, Lord Voldemort was the greatest Dark wizard of all time. For eleven years he rampaged through Britain, killing people for no reason and for fun, with his band of followers known as the Death Eaters. But one day, on Halloween Night, October 31st, 1980, he went to the house where an innocent family named the Potters lived. It consisted of James and Lily Potter, and their one-year-old son, Harry Potter. He killed James and Lily. He tried to kill Harry, but couldn't, and thus, he became famous for becoming the only person to survive the Killing Curse - no-one survives. The Killing Curse backfired on him, leaving Harry with a lightning shaped scar on his forehead. Voldemort lost his powers, and was left alone and friendless and weak. For a while, the wizarding community was peaceful. Harry went to live with modern Muggles for safety."

"While?" queried Hiccup.

"Well, Harry, Voldemort has made a comeback. He has returned."

Valka clapped a hand to her mouth. "Dumbledore, sir, but..."

"One servant sought out to join his master, and nursed Voldemort back to health. Now the Death Eaters have returned also. And now, the Order of the Phoenix - during the First Wizarding War, it was in action, and now it is in action again. We fight against the Dark forces. We shall do so again. Your mother, before your birth, was a member. I asked her to join myself. I also asked Stoick the Vast. Now I ask their son. I heard he died... so sad, what a wonderful man..." A tear poured down his cheek.

"Wait-" said Hiccup. "I have to... what?" First Drago Bludvist, now a person called Lord Voldemort? Great!

"Valka will be positioned with the Order of the Phoenix, to reclaim her normal job, if she wants it."

"Of course! I'll help again!" Valka stood up.

"Good! The more, the merrier. Thank you for helping. You, Hiccup, and another friend will be undercover spies in Hogwarts, as a fifth-year student. Harry Potter-"

"Do I meet Harry Potter?" asked Hiccup, excitement rising.

"Yes," said Dumbedore. "You will be looking after him at school."

"But I'm not magic!" protested Hiccup.

"You will be given fake wands, and magical books. The Order will be funding for you - giving you money to buy Hogwarts supplies. You will be taking the non-magical subjects - Potions, Astronomy, History of Magic, Herbology, and some extras if you want. Perhaps Divination - the study of looking into the future-" was it Hiccup's imagination, or did Albus give a look of disgust about Divination? - "Arithmancy, working with numbers and numerology and grammatica, Care of Magical Creatures, where you learn about the different magical creatures that roam in the wizarding world, Study of Ancient Runes, and Muggle Studies. Of course, there are more subjects, but it is best if you just stick with those. Which ones would you pick?"

"I'll take Astrid with me and Mum," said Hiccup. "And... looking into the future would be nice, and Care of Magical Creatures - I'll definitely do that! But I'm not so sure about Arithmancy and Study of the Ancient Runes, and I don't think I need Muggle Studies. That's it."

"Good!" said Dumbledore. "I will sort it out with your friend Astrid."

"She lives over there." Hiccup pointed in Astrid's house's Then Dumbledore swept from the room, leaving Hiccup, Valka, Toothless, and Cloudjumper in the Chief's hut. Hiccup turned to his mother. "Why'd you not tell me?"

"Wizards aren't meant to be told about," explained Valka. "Son, they live in hiding from normal, modern non-magic peoples because everyone would want magical solutions to all the problems in the world. But some wizards, like Albus Dumbledore, know that Vikings still exist, and they keep in contact with us. But they cut off years ago. Besides, I didn't think you were ready for it anyway. Stoick and I planned to tell you later. And then Cloudjumper came..." her voice wavered off. "I don't think he told you. Either he forgot, or he didn't think you were ready."

Half an hour later, Astrid came rushing in through the door with Albus Dumbledore. "Hiccup! He... spoke to you too? Is it true?"

Hiccup nodded. "Did you-"

"Course I'm going with you! I want to see this magic school! I spoke to Albus Dumbledore, and I'm taking the same subjects as you..."

"Good," Hiccup smirked. If he got something wrong, he could rely on Astrid to help. But then, Hiccup remembered something. "The dragons. How about them?"

"You may bring them," said Albus. "My friend Hagrid will help you hide them. Now, for transport straight to the Order of the Phoenix Headquarters. Side Along Apparition would be sufficient, but I am afraid of you Splinching... oh yes," he added when he saw Hiccup and Astrid's confused faces, "Apparition is when you immediately disappear in one place and immediately find yourself in another."

"Cool!" said Hiccup until Albus continued, "Splinching is when you lose a body part when you Apparate."

"But we will not be using any Apparition," continued Albus. "We will be using... this." Hiccup was expecting something more magical, but to his disappointment, he saw the Headmaster pull out quite a large boot.

"Do not worry, it is clean," assured Albus. "This is called a Portkey. Much safer. Bring your dragons here. Tell them to hold the boot with one paw." Hiccup brought back Toothless and Cloudjumper, who were eager to come, and Stormfly, who was very excited, and they all, wizard, Viking and dragon, put a finger on the 'Portkey'.

"This might be a bit bumpy," said Albus, "but it is very safe."

Then Hiccup felt a hook on his navel, and he closed his eyes.

Hiccup opened his eyes, and he found himself that reminded him of a village, except that the houses looked different.

"There it is," pointed Dumbledore, with one hand pointing at a gap between two houses, other hand stroking Toothless.

"But..." Hiccup began, and Albus slipped a parchment in each of their hands. "Memorise it, then throw it, leaving no trace!" He said.

Hiccup looked down and read the fancy writing:

The Headquarters of the Order of the Phoenix may be found at Number Twelve, Grimmauld Place.

Hiccup turned to Albus, but he had gone.