Disclaimer: I do not own any part of the MCU or Potterverse.

AN: First attempt at a crossover fic,some inconsistencies may occur.

Chapter 1:The beginning.

It had been four years. Four long years since Harry had entered this world, a world so similar yet so different from the one came from, as there were no wizards here, no wizarding world. It had taken a lot of effort for him to get himself acquainted with this mundane world.

That's what he had thought this world was when he noticed the absence of the wizarding world. Oh how wrong he was!

Seeing an opportunity to finally lead his life as an anonymous person, Harry had quickly settled in the outskirts of a small town in Britain, by using some of the gold he had brought here with him. Excusing his lack of knowledge of the muggle technology and science due to his rural and strict upbringing, he quickly acclimatized himself in the locality.

It had been easy to avoid the uneasy questions, low powered confundus worked like a charm! Magic. This was another aspect of his life which had changed. It worked similar, yet different to the way it worked when he cast spells. He could no longer feel the magic working its way through him when he cast simple spells. Even hours of using magic didn't leave him as exhausted as he should have, even with the help of the elder wand. The elder wand; The Deathly Hallows.

The three hallows had never left his side since his twenty second birthday. He could still remember that day as if I had occurred yesterday.

FLASHBACK

Harry couldn't help but wonder how things had gone so badly, as he held the crushed remains of his faithful holly wand. It had been a fairly simple experiment, combining the ancient energy runes along with illusionary runes, to create a perfect illusion based defense ward. He had no idea what went wrong when the stability of the rune system collapsed and a huge force sent him flying across the sealed chamber. He watched as his reliable imprimis shield was torn apart by the invisible force and destroyed his wand. He was devastated, torn by grief; he hadn't felt so helpless since the day Sirius had died, two years ago.

Magic was building up inside him; he could feel it coursing through his body, even without casting spells. He let out a primal cry of rage and need, releasing a whirlwind of magic, destroying the chamber in process and ultimately losing his consciousness.

Harry opened his eyes to find himself lying on the floor in a completely destroyed chamber. He could only see the white walls, stripped bare of all their decorations, instruments, protections, until his eyes landed on a black package, right down near his feet. He slowly moved towards the package, to see that it wasn't a package at all- it was his invisibility cloak, folded, with the resurrection stone and the elder wand on top of it.

Though that wasn't the only change he noticed, a symbol of the hallows could be seen tattooed on his left forearm.

FLASHBACK ENDS

He stopped reminiscing about his past life, and exited the JFK International airport. There was work to be done here, he had missed too much in his bid to lead an isolated and anonymous life.

Taking a cab to a nearby hotel, Harry began musing about the strange events taking place in the city of New York. The first incident he had heard and later seen about was a man called Tony Stark, who had appeared in a red and gold suit made of some metal, which appeared to be immune to the guns used by the muggle enforcement. There was another incident involving this man, and he had witnessed a fight between him and many other similar suits. The event though, which prompted him to come to this place was the arrival of Thor. Now he hadn't been much of a believer in mythology back home, but when Thor, the supposed God of Thunder in the Norse mythology had appeared out of nowhere, with his Mjolnir, Harry knew this world was anything but mundane, and that New York City was the place to be.

To arrive in the city, Harry knew that he had to create a false history about himself, and hence he made himself to be a traveller who had recently inherited a small fortune from his recently deceased uncle, and had come to New York to settle down.

Settling down in his room, he slowly changed into his nightclothes and quickly fell asleep.

Xxxxxxxxxxxxxxxxxxxxxxxx

A month after his arrival, Harry had completely blended in with the people. He owned a small mansion in the city, a small café and had begun researching about the incidents.

He couldn't find much about Thor, only that he was banished here by his father. Tony Stark, on the other hand was widely known by people all over the world. He had started interrogating the lower level workers of the Stark Industries using legilimency, it wasn't really ethical, but there was no other option as he couldn't brew veritaserum in this world. Tony stark, to simply put was a crazy genius. A rich unmarried guy, with a sense of humour, a playboy, having an extremely high opinion of himself, yet a genius when actually put to work; he was the Sirius Black of this world. Harry could see the way Tony Stark always avoided delicate questions by making some completely unrelated joke or doing some stupid act, just the way his godfather used to do.

Then there was Bruce Banner, of whom he had learned after arriving in this city. He reminded Harry of Remus, a genius and a good person, suffering by a condition he had no control over, yet tried to help other people.

Captain America, the comrade of the old, recently woken up from his so called coma. One of the few genuinely good people he knew about in either world.

There were some very intriguing personalities in this world, and Harry knew not how his powers would work. There were some pretty awesome powers he had gained after coming here. He was able to will his wand to him in his own world; here however, he could perform wandless magic as easily as with a wand. It lacked the finesse to perform complicated charms or runes, however it was easy to perform transfiguration. He still preferred to use a wand though, for a sense of familiarity if nothing else.

He was preparing a meal when suddenly his magical senses flared and he detected a spike in the magical levels of the surrounding. He detected a huge disturbance in the ambient magic levels of his surroundings. He tried to locate it, but the source seemed to be too unstable for him to locate. Unable to find the source, he turned on the news, but there was nothing out of ordinary. He was about to consider this as a one-time anomaly, when he felt another wave of the disturbance.

Palming his elder wand and willing himself invisible, Harry apparated out. It was after multiple apparitions that Harry arrived at a place of interest. The Stark Tower. To the ordinary eye, there was nothing untoward to be seen near the Stark Tower, but Harry, trained by the best unspeakables, could identify the smallest of differences. Appariting to the helipad, he could see a man working his way down the entrance, surrounded and protected by a dozen armed officers. Interesting, he thought, following the man silently.

Entering into a room, Harry could see Tony Stark sharing a glass of champagne with his girlfriend/secretary Pepper Potts when he saw the man enter.

"Security breach" he said.

" " the man replied curtly.

"Phil! Come in" Pepper said warmly.

"Phil? His first name is Agent" Tony countered.

Blanking out the small talk Harry began observing the room, spacious, luxurious, with a lot of tech mixed in, screaming out wealth. His attention was brought back when he heard Tony say "I thought the Avengers initiative was scrapped. And I didn't even qualify, apparently I am volatile, self-obsessed, don't play well with others."

"This isn't about personality profiles anymore" Agent Phil countered.

Harry saw the slides of various incidents showing the superhumans fight. Captain America, Hulk, Thor all were there, fighting and showing their capabilities.

It was after some hours, when Pepper had left, that Harry saw Agent Phil Coulson lead Tony into a helicopter. Following them quietly and maintaining a safe distance, Harry heard Coulson saying something about Captain America joining them on the helicarrier.

It was a long flight back, taking several turns and false routes to ensure there was no one following them. Harry stared in awe as he saw a huge vessel floating in the air, hidden in plain sight. It was surprising to see how far the muggles had come without magic, though these weren't exactly the normal muggles he reminded himself.

He followed them through a maze of doors, each secured by biometric security, ending up into what seemed like the control room. There were hundreds of devices, each looking weirder than the other, even greater number of agents. He followed Coulson and Tony to the centre where he spotted Bruce Banner and Captain America, escorted by a beautiful red-haired girl.

"Cap, Bruce this is Tony Stark; Stark this is Captain and Banner" the girl introduced.

"Agent Romanoff" he nodded towards the girl before shaking hands with Banner and Cap.

" , I am a huge fan of your work on quantum physics, your work on the anti-electron particle accelerator is unparalled; also I love the way you lose control and turn into an enormous raging green monster" he added with a wink.

Harry could hear the exasperated sigh Cap let out, but ignored it. He concentrated on the files on a blue cube which seemed to be the cause of all the recent disturbances.

He was about to touch the files when he heard Tony speak in a loud and clear voice "I wouldn't do that if I were you, Invisible man."

Harry froze, confused, his cloak had always concealed his presence from any kind of detectors, it was Death's cloak after all.

"There is no use hiding now, reveal yourself or you will be in trouble" Tony said in a no-nonsense tone, his hands now covered by his suit's repulsors.

The room's occupants looked at Tony with a disbelieving look and he heard Cap say "There's no one here Tony, don't play another act now."

In response, Tony powered up his repulsors and pointed at the spot Harry was in.

Harry had two choices, reveal himself now and face confrontation or escape and forever become a target of the Iron Man; he would never wish the latter on anyone.

He willed himself visible and slowly raised his arms in the universal stance of peace, to find himself on the gunpoint of dozens of armed men.

"Who are you, and why have you been following me from my Tower?"

"What? He's been following you from there and yet you allowed him to come here" came the outraged cry of Coulson.

"I am Harry Potter, and I am here because I wanted to know the reason behind the occurring of the recent strange events. Now if you don't mind, put down your guns and let us talk…in a more civilized manner" Harry said loudly and clearly, not wanting to show a picture of weakness.

"I don't think you are in any position to make demands . Now follow me quietly" came a gruff voice from a new person. A tall, well-built man wearing an eyepatch stared into his eyes with a stern gaze.

"Very well, let us go. But no handcuffs, I really don't like those nasty things, quite annoying really" Harry said as he followed the man and the avengers into what seemed to be a secure room.

Before anyone else could speak, Harry decided to introduce himself "Now I know you all have questions, so why don't I start with who I am, and how I got here without you noticing me, alright?"

Not waiting for answer, Harry continued "As I said before, my name is Harry Potter; I came here to find the cause of the disturbances of the energy levels on recent days. As to how I know this, let me warn you, you have to look beyond the scope of your world to understand it. The object causing the disturbance is magical in nature, at least partly, and I can sense magical levels in the areas surrounding me. And with me being invisible, let's just say that I can do a little magic too."

"Magic? You gotta be kidding me! There's no such thing as magic" came the outrageous cries of everyone inside the room. Not wanting to be a part of another magic doesn't exist conversation, he silently transfigured the desk into a cat.

The effect was instantaneous; everyone became silent, their mouths hanging open for a second before they recovered. A moment later, Romanoff had her gun pointed at him.

"Come on guys, we just agreed to a conversation with no guns and threatening" Harry said aloud in an exasperated voice.

"Tell us more if you want a peaceful conversation " the man in-charge said.

"Fine, you may not believe this, but I am not from here."

"Not from Earth? From another planet then?" Cap asked in a serious voice.

"Argh, well not from this Earth anyway, but not from another planet. Just listen to me without interrupting; I am a wizard, grew up in Britain, lived in the wizarding world. But due to an…incident I arrived here, four years ago, not by my choice, where there is no wizarding world, at least not the one I knew.

I had been living in this world, trying to understand how things work, minding my own business in a rural area when heard of the events in this city- the Iron Man incident was one, Thor was another. I came here to investigate these events and was in the middle of a research when I detected unusual disturbances in the ambient magic levels of the city. The Earth, surrounded by complex wards, not entirely magical in nature, and this object bypassed the wards with no effort. This was concerning, and so I visited many places to investigate and found a source at Stark's place and so followed him here. As you can see, I have done nothing to sabotage your operations or harm you or your fellow agents, I come in peace and offering help."

"How can we trust you and believe what you have said. You must admit, it is a lot to take in" Cap said.

"The fact that you are all alive and well and there has been no attack since my apparent capture, you can see that I pose no threat to any of you. I could have easily escape when Stark took notice of me, I can do that you know, just pop in and out of places with mere thoughts, but I didn't, I stayed here and have been nothing but cooperative with you."

"I like this guy, so what else can you do, wizard guy?" Tony Stark asked jovially.

"Not the time to be funny Stark" Cap reprimanded him.

"Look guys, this is all going well and fun, but shouldn't you be looking into the problem we already have?"

" , for now we have no choice but to accept what you say, however, one questionable move from your part and you will wish you had never arrived here" the man said before continuing "Now, for those who don't know me, I am Nick Fury, Director of the Strategic Homeland Intervention, Enforcement and Logistics Department, known as SHIELD." Waving his hand over a screen, he projected a video showing a tall man dressed in green and black enter through a portal created by the blue cube, and engage with the director and his men in combat and escape.

"That is Loki, from Asgard. Non-friendly, aggressive and trained in combat, this man used the spear to manipulate the minds of one of the finest agent SHIELD has produced. He is the reason behind the way the tesseract has been operating recently."

'Loki! Well if we can have one god from the Norse then why not another?' Harry thought.

"He is the number one priority; Stark, Banner, I want you to locate the tesseract with the readings we have, it is dangerous to leave it in the enemy's hand. Romanoff, I want you to lead a team to search for Loki's location. Use the readings from th-"

His speech was interrupted from a loud bang as Agent Coulson along with another agent stormed in, and said "Loki has been found, he's in Stuttgart, Germany."

AN: That's it for the first chapter. Tell me your views on the start.