Crossover Avengers and Harry Potter

Disclaimer: The avengers and any other recognizable characters does not belong to me they are property of Marvel. Any Harry Potter (or the Fantastic Beasts) characters does not belong to me as well, they are property of J.K. Rowling.

A/N: Techno-path, All-speak Tony, seer Tony, All-speak Harry, Draconian-Bruce, All-speak Bruce, All-speak Stephen. Neglectful Albus! Dark Albus? Evil Voldemort. Additional notes at the end. This story does not have a Beta.

Parings: SeverusxFemTony, RemusxFemHarry, BruceBannerxCharlieW, StephenStrangex?

Summary: After Tony Stark, Bruce Banner and Stephen Strange died, Lady Death ask for a favor, considering the details that she gave them, they accepted. They were reborn in a new universe, different from their own, they wonders if their choice was the right one, the only thing that Tony could think was, damn his conscious and his desire for accountability.

Prologue: The end

The war against Thanos was worse than originally thought. Tony Stark, the Iron Man, had tried to prepare for it since the first invasion led by Loki. Many didn't take into consideration his concerns, he was after all, just a civilian with a case of posttraumatic stress disorder (PTSD). But him been a futuristic combine with his genius, could predict the future to a certain extent, too bad he was not taken seriously. Now it was too late, at least they manage to take the war to outer space, in order to avoid causing any more damage to Earth and her people.

Tony could not avoid the laugh that escaped his lips at the sight of the destroyed and mangle body of Thanos. Peter Parker aka Spiderman was looming over Tony's own inert body, blood oozing out of his numerous wounds, but the spider's healing factor kicking in to heal the wounded teen, the mask was long destroyed during one of the attacks. The Iron Man armor was destroy beyond recognition, there was pretty much nothing left of it, the arc reactor kept blinking in and out of existence. The skin around the device was heavily scar, red, swollen and smoking, a consequence of using more power than originally thought, and definitely more power than Tony's own body could withstand. Tony was missing his left arm, on the ground were his arm/hand should of have been was the Infinity Goulet broken in between his own and the Mad Titan's bodies. The Infinity Stones were gone, having disperse to space the moment the Goulet broke. His right shoulder was impaled by a spear of one of the Chitauri higher rank soldier, impaled while trying to shield the young spider. His abdomen had a gaping hole were most of his organs were spilling out. His right leg completely crush and the left broken beyond repair, as bones were sticking out of his flesh. Blood oozing out of his lip making him choke due to his own very out of place laugh. Thanos body lie next to his, ripped to shreds and unrecognizable. The only reason why Tony himself was still alive was because of EXTREMIS, but even with it, it could not heal all of the damage done to his body, it was working overtime to keep him alive, but he knew it would not be enough.

Despite the fact that he knew that he was dying Tony could not erased the smile from his face, ignoring all the pain. Soon Wade Wilson also known as Deadpool join Peter, placing a hand on the teen's shoulder, while said teen kept a hold on Tony's remaining hand. The red and black clad anti-hero had a black eye and the other swollen shut, there were numerous bruises and scratches in his face that were quickly healing, his cloths were rags that were barely holding together at its seams, stain with blood, his and his enemies, and he was holding one of his swords very tightly. Tony's body kept getting paler and colder as the seconds went by. He tried to say something to the boy but he only manage to choke even more on his own blood, with all of his remaining strength, he gave a light squeezed to the teen's hand. He closed his eyes to not open them again. He did not mind, Wade would take care of Peter, and make sure they return to Earth, save and sound, he was not sure who else survived, but he could care less, look who was right in the end, suckers. At least Peter was going to live. He let Death embrace him finally. He did not mind, he had lasted a good amount of time against Thanos, the Arc Reactor protecting his mind from the mind gem, the techno-path gained from the Extremis, was very useful when it came to confront and sabotage the Chitauri. He even had to stop holding back, his enhance senses from the super soldier serum, specially his strength, and his reaction time was enhance by the nanotechnology that was connected directly to his brain, he honestly didn't care he was always considered more machine than human, that and the fact that he could understand his bots despite that they communicated by beeps, well Friday could speak normally. Finally he was dying, he was going to miss Peter and the bots.

Chapter 1: The favor and a new life

When Tony woke up it was to an all-white room. He was lying on a white bed, on his right was Bruce Banner aka the Hulk and to Bruce's right was Stephen Strange, Earth Sorcerer Supreme, both were also laying on white beds. To Tony's left side of his bed sitting on a chair was a woman he knew quite well. She had shoulder black hair, black eyes, pale skin and was wearing a black dress with red details, as well as red and black heels.

"Hello Lady Death, not that I am not happy to see you but aren't I supposed to be dead."

"Indeed you are"

"So this is death, to be honest it looks quite boring, not that I'm complaining or want to offend you but there is no color, I'm going to go insane in this completely white room." He said while looking around the room "well madder than I currently are, since I'm considered to be quiet mad and insane." In the meantime both Bruce and Stephen had awoken

"It is understandable. We are currently in a place between life and death, you could say this is purgatory. I brought you all here the moment you died because I want to ask a favor out of you. You are my favorite mortal after all, you my dear merchant understands the balance between life and death, my place, and has never directly fear me." She said looking at Tony directly.

"If I can I'll see what I can do, but I make no promises."

"If that is the case then, why are we here?" ask Bruce as he referred to Strange and himself

"You two are to help as well" she answer then she added "You see, I need you to help and guide a young girl through some trials that awaits ahead of her. You will make sure that she is well taken care of, that no one would use her for their own benefit, and give her the loving family that she deserves. And Tony before you object saying some shit about how you would be a very bad choice, I would like to remind you of Peter Parker, Banner and Strange will be there to help and support, especially during the planning, when the time comes you three will be getting in contact and will get together"

"Fine, I will do it. Do you think I would be able to keep my babies?"

"You will be able to keep your bots, they will be helpful and useful" was her answer to Tony, "the three of you will keep your knowledge, and you are going to need it, good luck, I will be watching and be by your side, I will grant you the ability of all-speak, use it well."

With that the three men were shove out of the white room.

Year 1980

July 20

The first to wake up was Strange, he had just go through the process of his birth which he found out to be very disturbing.

"He is a baby boy" he saw the nurse carrying him announce.

"His name is Stephen Vindemiatrix Lestrange, Heir to the House of Lestrange" said a man who he guess was his father by the look of the situation. Well shit! He was a fucking baby!

July 25

In another place at another time Bruce Banner was going through the same disturbing experience of living through his birth.

"It's a boy" said the woman holding him as he was deliver to an older woman dress nicely "I'm sorry Lady Black, but his mother did not survive the birth"

"Oh, my dear Regulus would of have being very happy, it saddens me so that he did not live to see his son be born" responded Lady Black "My dear grandson will be name Regulus in his father's honor. His full name shall be Regulus Batentaban Black, and he will the next Lord Black, I will name you Heir to the House of Black"

It was just Bruce luck to have both of his parents' dead, and was going to be raised by his overly emotional grandmother, fuck his life!

July 31

"Congratulations Mr. and Mrs. Potter you had twin baby girls"

"The eldest shall be name Harriet Lily Potter and the youngest shall be Antonia Jaimie Potter"

As Tony heard the announcement the only thing that cross his mind were a big amount of insults toward Lady Death. He also hope to forget the traumatizing experience of his own birth.

Not only Tony was a baby, but a baby girl at that! Fucking shit! Fucking hell! Fucking Death and her twisted sense of humor! Maybe death was a better option than this.

The three were furious, they had to grow up again, and be at the mercy of others while they were infants. Hopefully it would not be that bad.

Additional Notes: My reasons:

Why seer Tony? Tony is a futuristic, meaning that he could predict future events by analyzing and calculation. There for why the seer abilities.

Why techno-path? In the comics Extremis granted Tony the techno-path ability, so I decided to keep it. It is going to be useful letter on in the story despite the fact that the Wizarding World is lacking in technology.

Why all-speak? All-speak was a gift given to them by Lady Death, but it will be useful later on in order to communicate with other magical creatures,

Draconian Bruce: At first I was thinking about making him a werewolf, but then the Hulk would be limited to the full moon. So I decided to make him a dragon shifter, and thought that the dragon was a better option to have the Hulk change to. A green dragon.

Why Stark, Banner and Strange? They are very smart, Stark and Strange are cunning, while Banner seems to be the more reasonable and down to earth of the three.