Disclaimer: I don't own Percy Jackson or harry potter. I also borrowed a few things from a fanfiction called 'dark phoenix'.

This story is set in the 5th year of the harry potter series. And after BoO, but does not include the Apollo series. (mainly because I don't really like them)

This is also my very first fanfic so yeah. Please excuse any grammatical errors as I am really bad at grammar :3

Warning: Cussing (very little)

Shadows

Chapter One: Arrival

Harry's POV

"…intent on preserving what ought to be preserved, perfecting what needs to be perfected, and pruning wherever we find practices that ought to be prohibited." Umbridge sat down. Dumbledore clapped, but he was one of few who did. Dumbledore stood up.

"well that was most illuminating. As I was saying, Quidditch tryouts will be held…"

For the second time that night, he was interrupted. This time though, it was very clear as to why. Above the Slytherin table the shadows had condensed on the wall.

"bloody hell! What is going on?" Ron cried.

Then many people gave a shout; the wall of shadows was inflating like a balloon.

All of a sudden, it burst. Depositing someone; right on top of Malfoy.

"hey!" Malfoy protested as the boy, who could not be older than 14 or 15, rolled off him onto the table.

"is he dead?" one of the Slytherin girls asked.

"why don't we…Merlin!" Came a first years startled cry. As soon as his fingers had touched him, the stranger had jumped to his feet. He seemed very disoriented, and started looking around for something franticly.

Reaching out with his left hand, the boy pointed at a sword about three feet long, and suddenly it was in his hand.

"I know you're there. Come out and fight." He muttered into the pool of shadows.

Cries and shrieks echoed across the room, as a dog, black as night, and big as 2 rhinos, stepped out of the shadows. It growled, a deep menacing sound. The boy just looked at it, and then he pounced. He jumped with incredible speed, over the beast, and landed on its back.

Plunging his sword into the creature he severed it in two. then it turned purple, and was absorbed by his strange sword.

"young man! put down your weapon immediately!" Umbridge yelled. he turned and gave her a cold glance. she went back to hiding behind the table.

The boy stumbled a little, and looked as if he were about to faint. But just then, the shadows bubbled again. Looking up suddenly, the boy was back on full alert.

"another one?!" he asked, his tone in utter disbelief.

Another creature stepped out of the shadows. This time though, it looked humanoid. but with serpent legs, and the biggest sword Harry had ever seen.

'what the hell is going on?' Harry asks himself

The boy lunged, and feinted to the side as the creature almost sliced him in half with her sword. The boy got behind it, and with one slash through the middle, she melted into the sword as well. Stumbling again the boy jumps off the table, and closed his eyes. Then he places the sword on the ground, and several people cried out in shock as it dissolved into the shadows at his feet.

Then, the boy slumps down. He must have fainted.

Percy's POV

Nico was missing. Now, usually this wouldn't be a case for worry; Nico left without a word all the time. In fact, no one was that worried. That is until I looked in his cabin.

Now I dont usually go around snooping through other people's things, in fact I wasn't snooping at all. You see I had lost my shield, and thought I left it in Nico's cabin.

'what the hell happened in here?!'I thought when I opened the door. There were blood streaks all across the floor, gashes in the walls, and, Nico's favorite jacket was sliced to ribbons.

"what the…"

I just stared. No one was dumb enough to attack the son of hades in his own cabin. Yet, there on the floor was something that made me do a double ttake. A ripped green t-shirt.

'this t-shirt definitely isn't Nico's. he would never wear lime green'

I looked around the room; hoping to find any trace of where my cousin might be.

'what in the world am I going to do?'

outside, I hears the laughter of others, so blissfully unaware of the carnage inside.

"where are you Nico?" I whisper in desperation.

"what did you say seaweed brain?" comes the all too familiar voice.

"hey Annabeth." I sigh.

"what's got you down?" Annabeth asks, concerned.

"it's Nico. he's missing."

"what do you mean missing? you know he often leaves without a goodbye"

"yes, I know. but I was just in his cabin, and it's completely wrecked"

"oh, well, he might have wrecked the cabin on accident, and then left so he wouldn't have to face consequences" there was the Annabeth I knew. coming up with alternate scenarios.

"maybe, but that's not very likely"

"I know" she sighed. "what are we going to do?"

"I'm not sure. but I'm sure we'll figure something out wise girl"

"I sure hope so"

Nico's POV

'ugh, why does my head hurt so much?' opening my eyes slowly, I take in my surroundings. definitely not the infirmary at camp; none of the beds are this soft
I shake my head in an attempt to clear it, then I inspect the room. where the hades was I?

Just then an older woman who looked to be 40ish walked out of a back room. upon seeing that I was awake, she came over.

"how are you feeling honey?"

"I'm fine." I reply still trying to remember where I was.

"now honey, you were just attacked and fainted from mana exhaustion. how are you really feeling?"

The events of last night crash onto me. schist. I have no idea where I am. "Fine" I answer not really thinking.

"you wont sway me that easily."

I give her my death stare and release some of my aura. can't she just leave me alone?

"I'm fine, ok. so, um, where the had- hell am I?" I catch myself mid sentence, she doesn't notice "and who are you?"

"That's madam Pomfrey, and you are at Hogwarts school for Witchcraft and wizardry" comes an unfamiliar voice from the doorway

I turn to look. and all I can think of is that the Aphrodite campers would have a heart attack if they saw him. this old man was standing in the doorway wearing the most bizarre outfit I've ever seen. deep purple robes with stars on them. a long silver beard. and a night cap looking thing.

"and who might you be?" the stranger asks.

"It's rude to ask someone's name without telling them your own"

the stranger gives me an appraising look. "that's true. I'm Albus Percival Wulfric Brian Dumbledore. my students call me Professor Dumbledore."

That name was much too long for my poor ADHD brain.
"my name's Nico Di Angelo." I give him my full name because, well, he seemed different. now don't get me wrong, I was ready to jump up and shadow travel out of there as fast as I could if he showed any signs of wanting to harm me.

"well, Mr. Di Angelo. you made quite the entrance last night."

"I would be worried if I didn't"

Dumbledore smiled "well Nico, you attracted the attention of the minister of magic."

"who's that?" Minister of magic? and what? was he a wizard?!

"his name is Cornelius Fudge. and he is the leader of the ministry of magic."

"what's the ministry of magic?" some terrorist group by the sound of it.

"it is England's magic enforcement group"

"oh" great. a terrorist group with political power.

Dumbledore turned his piercing stare on me. I responded in kind

"by our laws Umbrakinesis is strictly prohibited"

"umbra-what?" this guy just kept making things up.

"the ability to bend shadows"

"oh, that..." I looked at the ground awkwardly. "where I'm from, umbra-, what you said, is not prohibited. in fact it is considered a great talent"

"and where might that be, Mr. Di Angelo?" oops. I really shouldn't have said anything.

"err, New York"

"and what might be the name of this place?"

"um, I cant tell you. it goes against our rules"

"I see."

the way he said that made it sound like he knows. can he? I wonder if he is allowed to know.' pondering this, I stared intently back into Dumbledore's eyes. he has very kind eyes. with a hint of sadness, he has seen many things. just like me.

"so, Mr. Di Angelo, you have a choice. you can go on trial for Umbraportation, or, you can have a sort of diplomatic immunity by being a student of Hogwarts for a year."

"Umbraportation?"

"using the shadows to teleport. the method you used to arrive"

"oh, where I'm from we call it shadow travel."

"interesting"

I wasn't sure if I was supposed to hear that last part as Dumbledore had muttered it under his breath.

"I would like to stay at Hogwarts. but I have to warn you, I am not known for compliance." I smirked. that was an understatement.

"well, if you would like to avoid detention I suggest you obey all the rules. also how old are you?"

"15. Sir." I added the sir because it sounded a bit rude.

"Don't call me Sir. it makes me feel old"

little late to 'feel' old. but then again what can I say?

"well Nico, I will make arrangements. Good day." and with that the old wizard left.

What in Hades did I just get myself into?! I really need to stop getting myself into these situations. But I was in no hurry to go back to camp. I was attacked at camp by someone in a green shirt, and I have had enough running in my lifetime. also, no one here knows my parentage, which means they won't avoid me for being a son of hades. I might actually make some friends.

End of chapter one.

Hi! I hope you like the minor changes that I made. and also, I will make the chapters longer. :)