Battle Royale For The Holy Grail

Disclaimer:
Fate/Stay Night is owned by Type Moon
Kamen Rider Gaim is owned by Ishimori Productions
Digimon is owned by Toei Animation

The various guest characters appearing in every arc are owned by their respective owners.

Hello, and welcome to my new Fate/Stay Night fanfic, and for the first time, I'll be doing a story that would follow the plot of the 5th Holy Grail seen in the anime of that series, though there will be some twists here as I'll be adding some plot that would do justice to the title of this fic, so as to make it interesting. While I have already watched the anime a lot, it was one of my favorites, but when I accidentally learned that a 2014 anime of the same name popped out on Wikipedia, I was quite intrigued, if this is a sequel or a remake, but nevertheless, it inspired me to come up with an idea and decided to see if this would attract readers and fans.

Now then, you're wondering why this is in the crossover category, in which this is the idea. Aside from the FSN characters, I'll be adding some characters from other series, and this is where I got the inspiration: KAMEN RIDER GAIM. Upon learning that Gen Urobuchi is helming the story, I decided to see how this would turn out as it stated that it would return the multiple rival characters, and 19 episodes later, I was hooked, so after re-watching Fate/Stay, I decided to come up with this story.

And lastly, as opposed to using the ACTUAL Gaim characters, I will be using some characters from various Digimon characters, most notably Digimon Xros Wars. After watching that series, it's like they are similar to the participants of the Holy Grail Wars, and after thinking about them, this gave me the idea to merge the three series and use the Grail war as basis for this fic, but this also would mean that alliances would be formed and break, and then the characters would be forced to make a decision on whether to GO FOR THE KILL for the sake of the ultimate price, or whether the main protagonists of their respective series would be forced to decide what to make the right move in order to save their loved ones.

As the title suggests, the MASTERS, along with their SERVANTS, are forced to fight rival masters and servants to the deadly end, though this is loosely inspired from the Battle Royale novel by Koshun Takami and the manga by Masayuki Taguchi.

And lastly, this fic serves as a side story to my current Kamen Rider Gaim fic, "Digimon Xros Wars: Armored Warriors of Fate".

Well, That's the summary I can tell you right now, but you'll soon see where this would lead to, so here is the first chapter, so read and enjoy!

Fuyuki City...ten years ago...

The Fourth Holy Grail War took place around the 1990's, supervised by Risei Kotomine. The corruption caused by Angra Mainyu took effect, allowing for the summoning of improper Servants like Gilles de Rais. The destruction of the Lesser Grail during the previous war led Jubstacheit von Einzbern to develop inside the body of a homunculus, leading to the creation of Irisviel von Einzbern. While the Holy Grail manifested, Kiritsugu Emiya, realizing that it could not grant his wish, effectively betrayed his Einzbern patrons by destroying it. The contents of it spilling out caused a large conflagration that killed five hundred people and destroyed 134 buildings. The only survivors of the participants were Kiritsugu, Kirei Kotomine, and Waver Velvet. Gilgamesh, through being incarnated by the mud of Angra Mainyu, also managed to still exist in the world.

Due to the inconclusive termination of the War, the Grail's failure to grant a wish to the selected victor, Kiritsugu, and the victor's subsequent destruction of the Grail, it resulted in the premature occurrence of the subsequent Fifth Holy Grail War only ten years later. The unexpended thaumaturgical energy accumulated through the elimination of Servants was recycled due to the destruction of the Lesser Grail before the Greater Grail could direct the accumulated mana to establish its pathway, thus trapping some of the unused mana within the Grail.

Kiritsugu had planned to demolish the ritual as of the proper scheduled time of the Fifth Heaven's Feel by arranging for the physical collapse of the Great Grail System before the originally estimated date. The process involved utilizing stocked dynamite and the manipulation of ley-lines to ensure a severe localized earthquake in the targeted area within thirty to forty years of the Fourth War. The premature occurrence of the Fifth Holy Grail War and the subsequent destruction of the ritual means that it no longer has a purpose.

-x-

Ten years later...

The scene shifts to Fuyuki City, where the town is appeared to be moving on after the incident where many died and the true cause of that incident went in secret, and it is there that some of the would-be "participants" of the upcoming 5th Holy Grail Wars are making their moves to obtain their preferred servants, and there you can see that the scene shows that two of the participants are in the process of preparing themselves for the Grail war by summoning their intended servants.

-x-

At an unidentified area, a person chanted a summoning spell to summon a servant, and that servant would turn out to be Caster.Caster was originally summoned by a magus from the Mage's Association before the start of the Holy Grail War. He was a legitimate magus who was in his thirties with a medium build and few other noteworthy characteristics. He had no drive for combat, but still dreamed of victory while waiting for the other Masters to kill each other. She quickly gave up on him within a few days while planning to sever her connection to him. She made him use his Command Spells on meaningless things, so that he would have no control over her. She acted as an obedient Servant and filled the man's conceit in order to make him believe that she would still be faithful without them, and upon using his third Command Spell, she killed him with Rule Breaker because she did not like the fact that the contract still existed.

Because of her actions, she knew that she would disappear without a Master, and on the verge of her spiritual body dissipating, she stumbled upon Souichirou Kuzuki at the foot of the Ryuudouji Temple. Caster begged this stranger for his help; Souichirou obliged without hesitation, forming a new contract with her. He then brought Caster into the temple and attended to her recovery. Caster quickly fell in love with Souichirou, for he was the first man to show her genuine kindness, dedication and loyalty. Her primary objective shifted from obtaining the Holy Grail for herself to simply preserving their short time together. To achieve this end, she siphoned Mana from the populace of Fuyuki City and fortified her position on Mount Enzou.

She is known to others as an honored guest of the Ryuudou family, permitted to live at their temple until the preparations for her marriage have been finalized. She is thought of as a gorgeous and talented yet mysterious woman of high stature. Her presence has attracted the attention of many trainee monks.

After an unspecified number of days and/or weeks,Caster found and killed the regular master for Assassin before he could do the summoning. She used the mountain gate as a cataylst to summon a fake servant Assassin known as Sasaki Kojirou.

-x-

At the Matou manor, Sakura Matou, who spent years of "torturous tutelage" from Zouken Matou, did a summoning ritual and ended up summoning Rider, and she has become a Master, though because of her gentle nature, she is unsure on whether to participate in the upcoming Fifth Holy Grail War or not. However, Rider later became the Servant of Shinji when Sakura, pressured by Shinji, yielded her Master's right to him.

Despite serving a "new Master", Rider holds no love for Shinji, seeing him as vile and predatory, but obeys his commands as a dutiful Servant. Because of their similar backgrounds, she is empathetic of Sakura, and seeks to protect her whenever shown when Shinji bullies and antagonizes Sakura at every opportunity, and Rider was unable to intervene because of her status as Shinji's servant.

-x-

Elsewhere, the scene shows that another summoning ritual took place, and this time it is shown that Berserker is initially summoned by Ilya Von Einzbern in the Einzbern family castle two months before the start of the Holy Grail War. He is specifically summoned as Berserker, utilizing a slab of stone from a temple of Heracles for a catalyst. Choosing him for his vast strength and choosing the class to have a puppet unable to betray them like Kiritsugu in the previous war, they begin to prepare Ilya and Berserker as the strongest Master and Servant pair. Lacking any support from the Grail, Ilya is forced to provide the entirety of his energy, keeping her in constant pain.

Part of their training involves abandoning them in the Einzbern wasteyard, where only Berserker can keep them alive. He attacks any enemies, and she bears the pain of his movements draining her life away. The process slowly becomes special to him without his knowing. She hates whining, so she insults him instead, scorning his ugliness and cursing his existence. His existence causes her to suffer, so she hates him and keeps him in constant madness as a form of revenge. He knows it is only her desperate opposition, a way to hide the fact that she is fated to have nothing.

The burden on her begins to lessen as the Grail begins to show signs of appearing. After a particularly desperate battle where his body is severely torn from fending off wolves, where she began to scream for his sake rather than her own and endure the pain of his movement for his sake, she acknowledges him with the words: "You're strong, Berserker." He is covered in the blood of the beasts and she is covered in her own blood, and seeing her resting on him while crying tears of anguish, he realizes that he is the only one she has talked to in the entire castle.

After arriving in Fuyuki, Ilya and Berserker engage Lancer at some undetermined point. Lancer then leaves the battle unfinished in accordance with the command from his Master, Kirei Kotomine. They also attempt to storm Ryuudouji Temple to slay Caster, but Berserker is forced back by Assassin and Caster's magecraft weighing him down.

-x-

Months later, the scene shifts to the Ryuudouji Temple, where Issei Ryuudou lives with his father, came home, and as he is about to enter his home, an unidentified classmate of his came and the two talked, mostly about school work and the sorts, and while things are doing fine and they finished exchanging notes, the unidentified classmate then brought out his laptop and showed to him the "latest craze" which can be found in Kyoto, and Issei was curious as to what this "latest craze" is, and there the two teens interacted.

"Yo, Issei!"

"Yo."

"Man, do I have something to show you!"

"What?"

"It's one of the latest craze...and it's from Kyoto!"

"From Kyoto, you say?"

"Yup..and you'll be eager to see more of these!"

"Hmm..."

Opening the laptop, the unidentified classmate then opened a file which was a recording about the "latest craze", which would turn out to be the so-called "Invess Games", where a group of teens consisting of "dance teams" would duke it out using devices called "Lockseeds" and summoned creatures in a form of "holographic projections" called "Invess Digimons", and there the battle is somewhat akin to the popular, yet similar, games such as "Pokemon". Issei adjusted his eyeglasses as he watches the matches and battles yet he finds this rather absurd.

"That's the craze from Kyoto you wanted me to see?"

"That's right!"

"Looked so...kiddy...and if that's just that...then it's no big deal to me..."

"But I tell you...this is very popular...it's on the net!"

"Even if you say that...I don't think I..."

"Well, that's not the only thing you can see in those games!"

"Eh?"

"Here...there's more!"

To arouse interest, the unidentified classmate then shows additional footage which features the so-called "Armored Fighters", and Issei twitched his eye seeing the participants in the Invess Games are being "swallowed on their heads" by rather enlarged fruits which would later formed their armors, and that is where the classmate stated that things "get interesting" as if watching an "action/adventure" shows like that of "Pokemon".

However, unknown to the two teens, Caster, in her civilian guise, was secretly listening to their conversation, and seeing the footage on the laptop, she is intrigued by the so-called "Invess Games" and "Armored Fighters", so she bid her time as the unidentified classmate then transferred the video file on Issei's laptop so that Issei can see more of the video, and after that, the classmate left while Issei spent the rest of the day and evening doing house duties.

-x-

Later that night, Caster secretly took Issei's laptop and casts a spell, where the contents of the video magically manifested and there she saw and learned about the "Invess Games" and the "Armored Fighters", and there she saw each of them in order of appearances and the situations that led to their debut, which Caster took note with curiosity and interest as she gets to see who they are and this inspired her to look in to them.

"Hmm...a childish version of the Holy Grail War...but this one is...intriguing...and interesting..."

By then Shoichiro Kuzuki came and saw what Caster is doing, and there the two talked as she told him how and why she took Issei's laptop to see about the so-called "Invess Games", and there Kuzuki told her what he knows about it, and at the same time he showed her an additional video about the latest, which are the "Armored Fighters", which gauges her curiosity upon hearing those words.

"I didn't know you were in to that thing..."

"Ah, Souichiro-sama..."

"My apologies if I..."

"No...it's okay...I happened to overheard Issei's conversation with his friend...and out of curiosity...I checked it..."

"Well...what you saw right now is the real thing...and it happened in Kyoto...and it's very popular among the youth of today..."

"Those children...I had no idea they can fight personally...I think I can use them as pawns of sorts..."

"I happened to get some data on them...would you like to see them?"

"Yes, please..."

By then Kuzuki inserted a USB flash disk and played it on the laptop and there Caster watches the scene as the videos showed the list of the "Armored Fighters" in their order of appearances:

Armored Fighter Gaim

- A part-time member of Team Gaim and is situated at Kyoto. The identity is that of a 19-year old university student. He is fist seen after an Invess Game between Teams Gaim and Baron went out of control due to an Invess-Digimon went out of control, and the teen member of Gaim, identified as Taiki Kudo, uses the Lockseed and the Lock Driver to initiate his transformation into Gaim. Gaim then went on to defeat the Invess Digimon to save the city.

Armored Fighter Baron

- Leader of the dance team of Team Baron. This team acts as the main rival of Team Gaim, and leads the team ranking as well as he is known for being cold, as its leader, identified as Ryouma Mougami, believes firmly in the doctrine of "the survival of the fittest", thinking that "the weak should perish for the strong". Because of this belief, Ryouma and his team held the top spot within the rankings as they defeated numerous opponents in the Invess Games until they meet an unexpected defeat at the hands of Team Gaim, which showed Armored Fighter Gaim's surprise debut.

A week later, Ryouma challenged Team Gaim's Taiki Kudo to a duel where he has revealed his own devices and made his debut as the Armored Fighter of Team Baron, but his duel with Gaim mysteriously ended in a draw, but in subsequent matches Armored Fighter Baron resurfaces and showed off his power in defeating numerous opponents in the Invess Games, and soon the duel between the two Armored fighters would soon take place.

Armored Fighter Ryugen

- Another member of Team Gaim, and unlike some of the dance crew team members, he is identified as Takeru Takaishi, and he is a 16-year old high school boy, and attends in an elite high school in Kyoto. Not much is known about him apart from being referred to as "TK", except that a few days after the unresolved battle between Armored fighters Gaim and Baron, TK's debut as an Armored fighter took place when the leader of Team Invitto attempts to challenge Team Gaim, and there TK debuted as Ryugen, and wins the battle.

The information, as well as the videos of the three aforementioned "Armored Fighters" proved invaluable for Caster, and decided to study more about them and asked Kuzuki to gather more information and videos about the Armored Fighters in battle, in which Kuzuki obliges, and so both decided to retire for the night as she began to have "brainstorms" on how to use this information she acquired to her advantage, seeing them as useful tool that she could use in the now-upcoming Holy Grail War.

"You wished to use them as pawns for this Holy Grail War? What can you possibly do? Only seven Masters can participate..."

"I will use some ways to make that happen...and if I managed to come up with a plan...it will benefit us..."

"Very well..."

To Be Continued…

Hope you liked this chapter, and though not much action is shown, this serves as an opening for the next battle, as Rin and Shirou's debut as Masters are about to be shown.

Moreover, Caster has gained some considerable information about the so-called "Armored Fighters" and intends to gather more information about them before commencing her plans to deal with the other Masters in order to gain the goal she seeks.

Preview:

Rin summons her Servant, while Caster finally gained enough data on her targets, the "Armored Fighters", and uses them as her unwilling pawns in her plans in accordance to the Holy Grail Wars that would benefit to her advantage.