AN: I love all the positive reviews on the Prologue this is my second attempt at a fanfiction and my first at a crossover. As a reminder I own nothing Harry potter is owned by JK Rowling Marvel and it characters are owned by Marvel which in turn is Owned by Disney
The first thing Harry was aware of when he woke up was a series of explosions, his instincts from the war taking over he jumped up and looked around. The first thing he saw was vehicles blowing up followed by soldiers jumping out of the vehicles only to be shot from somewhere out of sight. As he slowly made his way towards the commotion to see if he could help, he saw a man in an expensive suit getting out of one of the only remaining vehicles and running for cover behind a rock. As he reached the man he saw him pull out a phone to call for help however it was to little to late as a missile landed beside them, Harry attempted to throw up a shield to block the pair of them however for the first time he could remember since learning that he was a wizard his magic didn't respond. Barely having a second to curse Harry felt a sharp pain both arms before he blacked out.
Slowly waking up the first thing that Harry was aware of was both his arms were wrapped in what felt to him like the gauze. The second thing he was aware of was that he wasn't alone, he had found himself in a cave with two other men one of whom was the man from earlier who now appeared to have wires running out of his chest and one he had never seen before "did anyone get the number of the truck that hit me?" The other man laughed "good to see you awake I am Yinsen I bandaged your injuries for you while you were out however I was unable to reach the shrapnel that embedded itself within your arm." Harry studied the man for a moment, and looked down at his arms before nodding, "I appreciate that my name is Harry how is our friend there," he responded gesturing towards the figure from earlier. Yinsen seemed to study him for a moment clearly having expected much more of an outburst from Harry over having pieces of metal stuck is arm.
Shrugging the man now identified as Yinsen turned to face the other figure in the cave, "Tony is well there was much shrapnel in his chest I removed what I could but was unable to reach the rest I placed an electromagnet in his chest to keep it from reaching his heart." It was in the middle of the explanation that Tony woke up and Yinsen had to stop him from removing the wires.
Harry nodded before standing up, "okay well I for one am not a fan of the cave motif these guys have going on here so what do you say we escape?"
Yinsen gestured to the door "it is re-enforced steel there is no getting through that."
Harry laughed in response "I have a few tricks up my sleeve." Standing up he walked towards the door and tried to conjure a simple flame just hot enough to melt through the door, however his magic didn't want to respond. Frowning Harry reached deep inside himself and finding his core as he had been taught to do when learning occlumency. His frown deepened when he saw what appeared to be a wall around his magic. Harry began to push attempting to get his magic to pulse, ever so slowly he began to get a response bits of his magic began to flow over the wall giving him power to work with. He felt his magic begin to travel through the pathways however as it traveled up his arm he felt pain shoot through his arm equivalent to several targeted crucios being cast upon him at once causing him to scream out. "Maybe I don't have any tricks at the moment." He looked down at his arms there were very few metals that could affect the flow of magic and if any of those metals were part of the shrapnel stuck in his arm then he was screwed he would have no access to his magic not to mention the blocks.
It was soon after the room was entered by several men one of which stepped forward and explained with the help of Yinsen translating that they wanted Tony to build his latest missile for them. At first, he refused but after they dragged him away and presumably tortured him, he agreed. After receiving all the materials, he needed he began building however it became apparent at least to those three in the cave that he wasn't building a missile like their captors had wanted.
"Tony what is it that you're building it doesn't appear to be a missile?" Harry inquired.
Tony looked up as he snapped the piece into place "It's a miniaturized arc reactor we have a big one of these powering my facility in Miami this one is to get me free from the battery in my chest after that we get out of here."
Harry nodded studying the device as Tony turned on the liquid nitrogen which once reaching the device caused it to light up "It feels kind of like my magic," over the time they had spent together which they had estimated to be several weeks based on the passage of time using the delivery of meals, if one could call them meals, Harry had come to trust the two men and had told them all about his magic. At first, they were angry, mostly Tony though Yinsen was a very laid back man. After some shouting, Harry explained that if his magic was working normally, if it was responding, if the wall wasn't around his magic, and if he didn't have the metal in his arms they would've already been free. Harry considered for a moment before he picked up the Arc reactor and held it between both hands looking up to ensure he was out of site of the cameras he cast, "Incendio", after several seconds in which Harry had to fight against the wall around his magic to get it to perform, bright blue flames shot out of reactor and while Harry felt the pain same as before it felt dulled "interesting."
Turning Harry faced Tony, "is this the smallest you could go?"
Tony seemed to consider for a moment "I could possibly go smaller though the power output would be a fraction of this, and I don't know how much longer our captors would be willing to let this go on."
Harry nodded, pausing to think for a second, he turned looking up at the camera and using the arc reactor he cast a confounding charm, "there now they will see what they expect to see Tony building the missile, if we can build two smaller versions of these and some form of holding unit then maybe just maybe we will have a real shot at getting out of here".
After swapping out the car battery for the Arc Reactor Tony, sat down at his work station and began doodling on some of the paper he had, grabbing Harry Tony pulled him over and took quick measurements of his arms length and width, Harry felt as if he was back in Ollivander's getting measured for his wand.
Several minutes later Tony walked over plans in his hands and laid , "This suit is our ticket out once built we will be able to use it to escape with this combine it with your magic Harry, and we should be able to get far enough way to reach help." Nodding they immediately got to work building the suit and gauntlets. Harry had some very limited experience with technology outside of the odd engineering classes he had picked up here and there over the last two hundred years was very little help so he just dismantled what he could and left the actual construction to Tony and Yinsen.
The gauntlets were finished first as they were the smaller of the two. Strapping them on Harry gasped as he felt the arc reactors built into the gauntlets attempt to connect to his magic. Feeling that they were unable to he dropped into his occlumency and followed the path they took to his magic and guided them over the wall. Frowning as he saw the pathway bend, he knew it would affect the flow of his magic while he wouldn't be able to cast any of his higher powered spells he should still be able to cast enough to assist in the escape. Coming out of his trance Harry aimed his bracers at the far wall and cast a pair of bombardas, the clear spells came flying out and struck the wall with while not leaving as much of a mark as they normally do they indent they left was still quite significant.
It was several weeks later and finally the suit was finally complete. While Tony was getting into the suit and Yinsen was in the process of starting the boot up procedure on the suit their captors had gotten tired of waiting for their missile and had decided they would be finished today.
Harry crossed over to the table the gauntlets were seated on and slipped them onto his wrists, "You and Tony get that suit up and running I will hold them off."
"No Harry your magic isn't how it used to be, and Tony is going to need someone to protect him while the suit finished boot up procedures, I will hold them off." As Yinsen said that their captors sprung the first trap the makeshift bomb they had connected to the door exploding. Yinsen went running ahead of Harry grabbing one of the rifles and ran through the tunnels firing the rifle as he went.
It took several long agonizing minutes where all they heard was gun shots but finally the boot up process was complete. Standing up Harry nodded to Tony "lets do this," Tony nodded. Dropping the face plate the pair went running through the door following the trail of dead bodies that Yinsen had left behind.
Eventually the pair came upon an injured Yinsen, Harry was quick to rush over "hold still let me heal you," Yinsen was quick to steady his hand "No no this was my plan all along I am going to be with my family they were killed long ago and now I am going to be with them."
Harry wasn't happy about it but understood. Tony looked to be just as upset by this as he but was willing to let the man who had saved both their lives have his dying wish. After staying with him till he drew his final breath they got up and continued their path outside where they were attacked by the waiting forces. Allowing Tony to deal with the ground troops Harry apparated up behind the men manning the turrets stunning them and taking them out of the fight.
Returning to Tony's side he activated the rocket packs in the feet of the suit and they flew up and away. Coming to a crash landing in the sand they laughed "well for a test run that went pretty good," was Tony's response. Helping Tony out of the pit he had ended up in they began their trek through the desert. Eventually they heard a chopper passing overhead turning and waving their hands it landed where a man climbed out approaching Tony "how was that Funvee now huh Tony?" He asked half joking before turning to look at Harry "and who might you be?"
Tony was quick to interrupt "This is Harry he is part of the reason I am alive and he's coming with us." Gesturing to the man "Harry this is Rhodey." Extending his hand he shook hands with Rhodey before they climbed onto the chopper.
It was several days later that they arrived back in Miami after being examined several times over by doctors, during this time Tony had Jarvis work on fabricating and creating an identity for Harry. Stepping off the military transport that brought them to the US Tony's assistant approached "why Miss. Potts are those tears I see crying over your lost boss?"
Tony asked in what Harry assumed was his typical fashion, judging by the way the woman he now knew to be Pepper had laughed "no just at the prospect of having to find a new job," it was at that point she noticed Harry extending her hand "Hi I'm Pepper who are you?"
Taking the outstretched hand Harry shook it "Harry Potter I escaped alongside this one," he said gesturing towards Tony.
At the point Happy who was standing in the background gestured to the car "we must be going Mr. Stark have to get you to a hospital to be checked out."
Tony shook his head in response to this "Actually Happy bring me to Stark Industries Pepper call a press conference I have something that needs to be said but first a cheeseburger," turning to Harry "you like cheeseburgers right Harry?" Harry just laughed and nodded as they got into the car.
After stopping for burgers at Burger King the arrived at Stark Industries where they proceeded inside where Tony gave what was probably one of the most unorthodox press conferences ever held where he announced he was shutting down the weapons manufacturing section of Stark Industries until further notice.
Arriving back at Tony's house he set Harry up inside a room before dragging him down to his lab. "Okay Gandalf let me see the full extent of these powers of yours," Tony gestured to a target range in front of him.
Harry nodded sliding the gauntlets on to his wrists he prepared himself. Starting off slowly, he cast some basic shielding charms before moving into offensive spells such as stunners and disarming charms. "Before I cast these next three spells, I need to explain a bit. Where I come from these spells are forbidden so I try to avoid them whenever possible only two of the three am I able to demonstrate as the third only affects the mind." Gesturing he attempted to cast but couldn't work up the power needed in order to cast them. "Guess I cant cast those spells whatever that wall around my magic is its restricting my access to my more powerful spells."
Tony stared shocked at the variety of spells unsure of what to say before smiling "Jarvis did you get all those readings?" Jarvis replied in the affirmative "I did sir," Tony nodded before turning to Harry "once I build a new one of these," he said gesturing to the Arc Reactor in his chest "I'm designing a new suit for my self and new gauntlets for you…" Tony trailed off for a second as he looked over Harry "you'll probably need something for protection as well."
Harry shook his head "I've got that covered." Reaching into his backpack he pulled out his dragon and basilisk hide leather jacket and pants he had commissioned in his old dimenison "this jacket and pant set are made up from some of the most powerful protective skins from some of the strongest creatures of my old dimension. It's comprised of a mix of basilisk and dragon hide sewn together with acromantula silk, nothing can penetrate either of them and once I put on the hood from the jacket my identity is hidden as well." Tony nodded before moving to his project table to start.
AN: The marvel universe won't start changing until the end of Iron Man most of the events of Iron Man will follow canon from the MCU until the battle with Obidiah from there things will be very AU.