A/N: Although some of my readers are likely disappointed that I decided to start YET ANOTHER story in lieu of updating Aincrad Realized or Sending A Bigger Monster, this was something that has seized my attention for more than a month and wouldn't. Let. Go. A recent original anime series has started airing called Re:Creators, wherein fictional characters come out of their stories and into the real world. This series was written by the same man who created Black Lagoon, and directed by the same director as for Fate/Zero, features music from Sawano, and superb animation from TROYCA. Although the sheer amount of exposition in the series has drawn criticism, I've personally fallen in love with the show's great characters, thoughtful creativity in world-building, and great action sequences.

I was immediately resolved to write SOMETHING for this series, as everything about this just SCREAMS fanfiction material (there are rumors even that the show was originally going to feature licensed characters but got bogged down in power debates). In the end, due to a number of (obvious) parallels to the Fate/Zero series, I have decided to do a crossover between the two. Although Re:Creators is not even half done, at the rate of my updates, I reckon that the series will be over and done LONG before I get even CLOSE to getting this thing done.

And now, please read and enjoy!

Disclaimer: I do not own the Fate/Stay Night franchise or Re:CREATORS.

Prologue: All the Pieces Have Come Together

None know the nature and intricacies of the multiverse like the vampire master of the Kaleidoscope, the Second Magic, Kischur Zelretch Sweinorg.

He has traveled not only to countless worlds, but countless iterations of the same world.

Being as eccentric as he is, he goes wherever and does whatever his whims take him whenever they do. And because he has traveled as much as he has, there are a great many things he has witnessed in his travels.

The rise and fall of mighty civilizations of stone, wood, iron, steel, and more.

Epic battles between heroes from across time and space.

He soon found, however, that a great many of these worlds were nearly identical, separated from one another because of the differences in the actions of a select few. Nothing attracts his attention in these worlds more than those special individuals who held within them the power to affect change upon the very course of their worlds.

One thing that marveled him more than anything else, however, was that rare time when two worlds intersected, causing events that astonished and amused him more than anything else, as people following the laws of different realities interacted and conflicted with one another. And whenever he met himself in one of these events, he rarely enjoyed his life more.

Thus it was that one time, he met an alternate self who recounted him a rather unusual phenomenon he had witnessed one time, of an alternate world that, in turn, spawned a multiplicity of other worlds straight from the imaginations of writers. And this, despite the fact that it had no magic of its own.

Fascinated, he followed this alternate self to that same world, and marveled as he watched the creations of fictional writers emerge into "the realm of the gods" (he couldn't help but snicker and laugh at that), seek out their "Creators," and do battle with one another to determine the fates of all of their worlds, including that of the "Creators." He could not help but find striking similarities between this and the Holy Grail Wars waged in both his own reality and in others that he had traveled to.

That was when a thought came to him: within the infinitude of the multiverse, there ought to be a world where the two events coincided.

Being the Master of the Second Magic, this was no difficult task for him in the slightest. All he really had to do was to mentally make known his requirements for the world he sought to the Kaleidoscope, and it would take him to the best world that fit his requirements.

And so, he appeared in another world, manifesting in a park alongside a glittering river that divided a city in two, flowing beneath a bridge into the sea. Despite the increased urbanization and some skyscrapers he didn't recognize, the familiar sight of the Fuyuki Bridge more than confirmed for him that he was in the battleground for the Holy Grail Wars.

Wanting to observe the inevitable conflict, but not meddle in it, Zelretch made his way to Shinto, the new, modern district of Fuyuki City. Quickly finding himself an expensive hotel with a lavish penthouse, he immediately got his bearings, and got to work making sure all the elements were in place.

He found himself somewhat confused when he had confirmed earlier in the day that he was in the 2010s, which, while accurate for the timeline of the creations, came into conflict with other realities where the Fourth and Fifth Holy Grail Wars occurred in the 1990s and 2000s respectively. He was further surprised when he learned, in a roundabout manner, that Lord Kayneth El-Melloy Archibald was a Master for the war. He also learned that Kiritsugu Emiya, the Magus Killer, was believed to still be active. He couldn't directly verify whether Kariya Matou was with Zouken (or rather, he chose not to). However, the confirmation of the absence of Waver Velvet from the Tower, of the life of Risei Kotomine and Tokiomi Tohsaka, as well as a recent spate of gruesome murders, gave him certainty that it was the Fourth Holy Grail War that was going to soon commence.

Knowing now that one side of the equation had been confirmed, he decided to check for the creators and the creations, quickly proving a far simpler task with the aid of the Internet.

While he initially wondered how the Creators Incident, which had been largely localized to Tokyo, would intertwine with the Grail War, he was surprised to find that, in this world, the Creators that had taken center-stage were all living here in Fuyuki, Matsubara, Marine, and Nakanogane, finding their addresses. He was also quickly able to confirm Sota Mizushino's habitation in Fuyuki as well.

As for Setsuna Shimazaki… He could only sigh.

The Creations, of course, were the simplest to discover,

The warrior princess Selesia Upitiria, the gluttonous scholar Meteora Osterreich, the justice-striving magical girl Mamika Kirameki, the supernaturally-aided street brawler Yuuya Mirokuji, the Saber-like Aliceteria February, the reluctant pilot Rui Kanoya, the drunken gunman Blitz Talker, and the psychopathic enchantress Makagami Chikujouin.

Then he looked for the Military Uniform Princess, and found her video, confirming her place in this reality.

For a final piece of confirmation, he extended his reach to the Japanese government, and found what he was looking for:

A government file detailing satellite data detecting a spike in radio interference and magnetic fluctuation several months prior, and reports of flying people, complete with blurry photos.

Photos of the Military Uniform Princess.

Zelretch decided he had done enough for now. Walking to the balcony, he looked up at the moonlit sky.

I can't wait to see how this show turns out, he thought to himself.

At that moment, his vampiric hearing detected explosions somewhat nearby. Turning in the direction of the Central Park, he saw smoke rise in the distance.

The corners of his mouth curled up into a grin.

It's begun.

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