Disclaimer: I do not own Harry Potter, Fate Stay Night or anything else.

Fate: Emiya Night

Chapter1: Zero Hour

November 1981
England: Surrey
No 4 Privet Drive

Vernon Dursley had been having a terrible morning having awoken to the sound of an inhuman wailing coming from just outside his perfectly normal family's home. He'd grumpily gotten out of bed and gone down stairs to see what all the racket was about when he discovered the unnatural source of the noise. It was a baby! A baby had been left on his family's doorstep covered in a blanket with a letter pinned to it explaining about how his wife's freakish sister and her equally freakish husband had gotten themselves blown up. Those freaks had then left this abomination on his doorstep and expected his family to take it in to raise as their own.

Like hell he was going to do that!

"We're not keeping that thing in this house," Vernon said with no small amount of distaste.

"Vernon please," Petunia Dursley pleaded. "What if their kind find out we'd gotten rid of him?"

"Like I care what those freaks do," Vernon shot back. "They can all go and die, it'd do the world some good to see them all in the ground where they belong."

"Where will you take him?" Petunia asked her husband.

"The orphanage," Vernon answered simply. "Let them deal with the freak like they deal with the rest of the mongrels."

"…Okay," Petunia nodded in agreement.

She'd always hated her sister for having magic while she did not, jealously and resentment had changed her from the little girl she used to be into the cruel woman that she was now. She couldn't stand the mere thought of having one of them living in her house, hell the thought of one being so close to her little Duddy-kins was enough to make her want to murder them all, something she would do given half a chance. They should just leave the normal people alone and kill themselves so that they could save everyone the trouble were her thoughts where they were concerned.

"I'll be back shortly," Vernon told her as he walked over to the couch where the freak had been put. He grabbed the blanket-covered monster and it started to wail again making him tighten his grip. "Shut up you freak!" he yelled which only made the abomination cry harder. "I said be quiet!" he shouted louder and dropped the disgusting creature to the floor.

However instead of the thud he had expected when the freak's head touched the floor, he was surprised to feel a sudden explosion of air slam into him knocking him down. The whole house shook as the floor and walls cracked, seemingly coming apart around them. The freak itself disappeared with a loud pop that was drowned out by the whole house falling down burying Vernon Dursley as Petunia dashed out of the crumbling house with her little Duddy-kins in her arms.

"Vernon!" Petunia called out to the rubble that was now here home.

Vernon Dursley would be recovered from the rubble an hour later by the emergency services and rushed to hospital. He would unfortunately make a full recovery and return to Privet Drive where his family's house had mysteriously been rebuilt and everyone's memories of its previous destruction had been erased. Though he didn't know it the Ministry of Magic had detected the accidental magic in the area and upon investigation had their Obliviators modify everyone's memories so that they didn't remember the incident.

November 1991
Japan: Fuyuki
Ground Zero

Emiya Kiritsugu, the man known as the infamous Magus Killer recognized as the greatest assassin in modern times was staring in horror at the scene before him. The world was ablaze as the fire and corruption from the now destroyed Holy Grail burned away everything and everyone around him. Homes crumbled, people died screaming, and even he was effected by it, feeling the corruption trying to consume him. But it wanted him to live if only to extend the time he despaired at what he had done and the consequences of it.

He'd given the order to destroy the Holy Grail and in so doing he'd saved the world from the Dark God that resided within it from being born in his lifetime. In response to this, Angra Mainyu had unleashed this hell onto the Earth just to spite the man who'd stopped it gaining a physical form in the world. Now here he was searching the burning inferno for someone—anyone—that he could save from this nightmare, and in so doing could save himself as well.

'Iri…Maiya…was it worth it?' Kiritsugu thought with no small amount of despair as he continued to search. 'Please, let me save just one life.'

It wasn't long before the clouds above started to gather and cry hollow tears onto the fiery landscape below. The flames died down soon after and yet he still continued to search, not paying the rain any mind. Finally after what seemed like hours he finally found someone that was still alive, two someone's actually. The first was a young boy with red hair that couldn't be more than five or six years old and the second was a small baby that looked European with similar red hair to the first.

They were probably half-brothers judging by their similar hair which would account for their differing features; there was no sign of a mother or father meaning that the two of them were most likely already dead and these two were now orphans. The eldest of the two boys strained as he opened his eyes and looked up at Kiritsugu's tearful face. He smiled down at them happy that they were both still alive though judging by the burns that the older boy was covered in that wouldn't be for long without some intervention from him. He had probably tried to shield his younger brother with his own body which explained the lack of burns on the baby beside him; Kiritsugu shook his head and quickly removed Avalon from his body.

He sealed the Noble Phantasm into the older boy and poured as much of his prana as he could into it in order to heal him. Even though Saber was now gone the sheath's healing abilities were still active though not to the same extent as they would be if the golden-haired young woman had been nearby. Still, it would be enough to keep the boy alive until he could receive proper medical care, something that was coming soon if the distant sirens and lights on the horizon was any indication.

The Fourth Holy Grail War was over and Kiritsugu stood as the winner though he certainly didn't feel like it. He'd lost his wife and his mistress in the course of a mere few days, and most likely his daughter as well. He'd tried to go back to Einzbern Manor in Germany only for Jubstacheit von Einzbern to bar him entry and effectively prohibit him from ever seeing his daughter Illyasviel ever again. Looking back on everything he was saddened to note that he'd lost far more than he'd gained and swore that he wouldn't lose anyone else close to him.

He'd adopted the two boys he'd rescued from the fire that spread through Shinto and had set about making his new place of residence in Fuyuki city somewhere where they could live. Their new home was rather traditional for a Japanese residence but that wasn't really a bad thing, especially since some of the neighbours nearby helped him finish moving in including that granddaughter of the local Yakuza boss whom reminded him of Shirley from his childhood, Taiga was her name if he wasn't mistaken.

It turned out that the two boys that he'd adopted could only really say one word each after what they'd been through so he'd decided to name them by those same words. The older of the two was now Emiya Shirou and the younger one was now Emiya Hari. Though Hari was too young to really understand anything he could say to them, Shirou knew that he was a Magus and wanted to be taught Magecraft. Kiritsugu hadn't originally intended to teach him it but decided to anyway since he could feel himself growing weaker from the corruption of Angra Mainyu and knew that he didn't have long to live. Five years passed by quickly and Kiritsugu taught his two adoptive sons Magecraft as much as he could.

"Hey," the eleven year old Shirou spoke up as the three of them sat down and stared up at the moon hanging in the sky. "Hey old man, if you're going to sleep then do it in your bed."

"Onii-chan's right tou-san," the six year old Hari agreed. "You don't look so good."

"Nah, I'm fine," Kiritsugu sighed tiredly. It wouldn't be long now, he knew that he was near the end, his body was beginning to fail him. "You know, when I was little, I wanted to be a hero."

"A hero?" Shirou asked him. "You wanted to be one? Did you give up?"

"Did something happen?" Hari questioned further.

"Yeah," Kiritsugu answered. "It's unfortunate but being a hero is a limited time thing, when you grow up it gets harder to call yourself one, I should have realised that earlier."

"I see," Shirou spoke in understanding. "That's just too bad."

"I know," Kiritsugu sighed again. "The moon looks nice tonight," he commented as he gazed up at it.

"Yeah," Shirou nodded. "Hey, since you couldn't do it, I'll do it for you."

"We both will," Hari agreed.

"Oh?" Kiritsugu inquired.

"You're an adult now, so you can't do it," Shirou reasoned. "But we can, so leave it to us, your dream."

"…Right," Kiritsugu said finally as he closed his eyes. "I can finally rest easy."

"Tou-san?" Hari asked looking over at him.

Hey Kerry, what do you want to be when you grow up?

Well, I want to be a hero.

Silently under the moonlight the hero Emiya Kiritsugu passed away peacefully…

Author's Notes:

I'm back and here is the start of my new Fate Stay Night – Harry Potter fanfic. This is just the prologue and if you've read some of my other fics then you know how I write out this kind of thing. I started this fic in a similar way to how I usually do things with writing out a well-known starting point and then working my way through a new storyline from there. For this fic that starting point was having Harry end up in the care of the Magus Killer Kiritsugu Emiya and becoming Hari Emiya. I had been toying with the idea of having him found by Kirei Kotomine but decided against it since I have a plan for what the future of this fic will bring and having him as Hari Kotomine would have forced me to rewrite most of the storyline.

Spoiler alert—anyone who does not want to know the overall direction that this story will be taking should skip the rest of this Author's Notes.

That being said I will warn you all now that this story will be divided into three separate arcs with the main character of each arc being Shirou then Hari and finally Hakuno. This will also be a Sorcerer-Shirou, ice-elemental-Harry and werewolf-Hakuno fic so be warned. Harry Potter is known for its secondary characters and so is Fate Stay Night so expected to see some references to people that don't have a lot of screen time in the series. You have been warned!

And damn it's good to be back!

Please Read and Review.

See Ya Later…