Disclaimer: This fanfic contains big spoilers for LB6. If you haven't finished playing through it and want to stay ignorant, I suggest you do not read this story, dear reader. But if you don't mind spoilers, then no one's stopping you from continuing forward.

FGO belongs to TYPE-MOON

Knight Of Avalon

Prologue

Artoria Caster, Kay

Tintagel, Faerie Britain, 2019 EoHQ:

Tintagel was a peaceful village, located on the Cornish coast of Faerie Britain, a village relatively isolated from the rest of Britain and its politics, like the rest of Cornwall. If an outsider were to come here, they'd mostly be welcomed by a quiet and slow-paced life lived by its residents.

However, one day the entire village was in a frantic mood.

News had come that Lord Woodwose, the 2nd Duke of Oxford and 3rd head of the Fang Clan, was coming with his soldiers, and the faerie residents were going about making sure they gave the Duke a proper welcome.

Elders barked out instructions as the more able-bodied fairies and humans cleaned up the houses and laid down carpets. Youngsters were instructed to maintain their decorum once the Duke arrived while those who didn't have much work chattered excitedly about seeing Lord Woodwose.

And why wouldn't they be excited? Lord Woodwose was a practical legend among the faeries, a veteran of the Mors War who had avenged his predecessor Lord Wryneck and personally slew the Mors King, after which he had served as the guardian of Britain for centuries under High Queen Morgan.

Even after Woodwose had lost some of his power and influence to the Tam Lin, he still was a respected figure for many of the common folk in the villages and deserved a fitting welcome.

The faeriesi also prepared lodgings in case Lord Woodwose decided to stay for even a day. Of course, the burden of feeding him and his soldiers would put a burden on the village's food supply, especially with the harsh winter of last year, but as long as they served the lord, there would be nothing too problematic.

But of course, despite what the faeries of Tintagel think, the Duke of Oxford was not coming on a leisurely trip, no.

A few days ago, a messenger had arrived at Woodwose's manor in Oxford, carrying news of a faerie claiming to be the Child of prophecy in Tintagel. As decreed by Queen Morgan, Woodwose was to personally take such Faeries to Camelot, question then, and then swiftly execute them.

As soon as he received the news, Woodwose gathered his executioners and set out for Tintagel with his retinue, with the Flag of Oxford - a dark blue with golden designs of a wolf and a bull facing each other with the High Queen's Holy Spear emblazoned in silver above them - flying proudly over his head.

The citizens of Tintagel received news that Woodwose would arrive by the evening. And despite a few faeries expressing concern, the faeries were excited…

…Except one.

"..."

"..."

"..."

In a dark prison cell underneath the ground, a young faerie girl of 16 years silently wept.

Artoria Caster was tired. Tired of all the abuse and exploitation she'd received at the hands of the Fairies of Tintagel, all because of her status as the Child of Prophecy, for which they wanted to keep the village standing and expand it further. For years, Artoria had ignored it all, even when she realized none of the fairies ever had her best interests in their hearts whenever they asked of her a favor. All they cared about was using the riches on which she'd washed up at Tintagel's beach as a newborn for furthering their own gains.

And then, when her 16th birthday came along and the treasure found itself drying up, the faeries even began questioning whether she truly was the Child of the Prophecy.

Artoria grit her teeth.

They'd accused her of being false.

After putting her through a hell for 16 years, they had the audacity to start questioning whether she was genuine or not.

And the worst part was…even she was concerned whether she truly was the Child of Prophecy. Her magical energy was abysmal by Faerie standards, and she could be considered nothing less than a fragile twig compared to even the frail old faeries of Tintagel.

Artoria grit her teeth in anger, ignoring the tears spilling out of her eyes.

After all that, they're now just going to sell me off to Woodwose and his thugs, and will probably celebrate when the news of my execution reaches them. Artoria thought.

But that was just faerie nature, wasn't it? She was just a precious resource to them, being their 'Child of Prophecy' when it had suited them. And like every resource, when they found out she was losing her value, they instantly threw her aside and were going to suck out every last piece of gold she would provide them.

While this was happening, the humans meekly stood by, doing nothing since they were nothing but slaves to their faerie owners.

Even when she knew everything that was happening to her wasn't something within the control of her tormentors, it didn't hurt any less.

Her face stretched out in a grimace as she tried to rein in her anger, but it was no use.

She hated Faeries.

She hated humans.

She hated this world.

When she was first thrown into the cell, she'd screamed she was going to escape before Woodwose arrived. And she did believe it at that time…

But it was no use. Even when she did manage to unlock her cell's doors multiple times, she never made it past the guards. Every time, it was a failure that ended with her being dragged back to her cell kicking and screaming.

And by this point, she'd practically given up.

"I'm going to die…" Artoria muttered.

All she was waiting for now was for the sound of cheering as Woodwose arrived in Tintagel. After that, it wouldn't be long before she found herself thrown into a carriage and taken to Camelot, where she would be questioned and then executed for the entertainment of its upper-class faeries.

Truth be told, it would probably be better if she did die. At least she wouldn't have to go on a quest to save this accursed land.

She could simply give up and take one last nap before Woodwose arrived.

It would be nice, wouldn't it?

And yet…there was still a small flame within Artoria. A small star that still shined and kept her going.

Even when death would be a better option, Artoria's being didn't want to do it.

Artoria closed her eyes.

But what could she do? At this time, it was already evening. At any moment, Woodwose would arrive with his retinue and all routes of escape would close.

She'd tried everything and failed.

How was she going to survive?

If only she had at least someone who could…

…

…

…

…Wait.

Artoria's eyes shot open.

Merlin's spell… She thought, sitting up, a fleeting memory coming back to her mind.

"U-Um, this is pretty new, Merlin." Artoria spoke nervously as she gripped her staff.

"I know, know. It's a pretty big jump from the lock picking and stealth magecraft you've learnt, but I'm telling you, it's going to be crucial."

"O-Okay? So what is this spell again?" Artoria asked.

"It's called summoning. It is a special spell that summons a warrior to help you in your time of need."

Artoria's eyes suddenly brightened up. "Really? Does that mean I can have my own knight to save me like I'm a princess?" She asked excitedly.

"W-Well…that's what it is, yes."

"Great! Teach me now!"

"Now, now…patience, Artoria. Let's go about it slowly."

Merlin taught her that this summoning spell could be used to summon warriors to help her.

Back then, Artoria thought it could help her summon her own knight, with whom she could play the role of a princess and have them save her.

Now…it was her only hope for survival.

I wish I had the staff with me. It felt more comfortable performing magecraft with that. Artoria thought.

"Okay, Artoria…think! What's the first step…step…right. Circle." Artoria muttered.

First was the summoning circle.

Artoria bit her lip.

W-Wait, I need something potent for something like that. Artoria thought.

And right now, the only thing she could provide was her own blood.

"Grr…oh bloody hell, I've got no choice." Artoria spoke before roughly scraping her left hand against the jagged surface of the floor, hissing in pain as the rock cut into her hand.

Artoria grit her teeth and pulled back her bleeding hand and began drawing a summoning circle with it.

And…done! She thought. The summoning circle could have been better, but right now she did not have the time. Woodwose could arrive any moment.

Next…catalyst…Wait, I don't have anything. Artoria thought before slumping. Looks like she just had to do it without one. Merlin didn't say what would happen if she performed this magecraft without a catalyst, but again, she just had to hope it worked.

With that, Artoria began her chant.

City of Acre, the Levant Coast, 1273 AD:

In a different time and a different world, the City of Acre sat on the Levant coast as the most prominent Crusader city of its time. Here, Christianity and Islam intermingled, as the muslim and Jewish population lived side-by-side with the Christian knightly orders.

Among those knightly orders, there were the mainstream Teutonic Knights who served as the main military force, the Hospitallier knights who operated the hospitals and the Templar Knights, were considered to be elite even among the other orders and were held with a degree of respect due to their higher experience with combat in the Levant during the Second Crusade, seeing as they've defended the Holy Land for more than a 100 years. Hence, the gates of Acre were guarded by a group of Templar Knights.

These knights rarely saw anything eventful. Every day, it was just admitting civilians or simply being annoyed by some who wanted to pick a fight. Even though the Templars underwent rigorous training to keep a level head, sometimes, they met people who could get under their skin.

…And one of those people was a rogue knight arguing with them at the moment.

The man was tall, with brown hair and a scar over his left eye. The man wore rather archaic armor that seemed to resemble that of Roman armour which had gone out of use centuries ago, along with a red cape running down his back.

Compared to the Templar Knights, the man had a much more rugged look, and spoke with a sharp tongue that would suit bandits.

"Honestly…" Sir Kay, one of the Knights of the Round Table, began.

"...What about me looks suspicious? Is it my scar? Aren't you supposed to be some of the best knights Christendom has to offer?"

"You have given us no information regarding your affiliation. Your coat of arms resembles those of the older kingdoms of England but nothing related to the ruling house of Plantagenet, you dress as if we've just come out of Rome's collapse…you certainly are odd." The Templar Knight replied coldly.

"For all we know, you could either be affiliated with the False Crusaders of King Richard or the Holy Knights."

"Tch. You Templars are one bunch of uptight pricks, aren't you? I'm just a traveling knight from Eng…Britain." Kay spoke, not wanting to say what is essentially the name given by Britain by its invaders.

"That fat, slippery, Moor over there can vouch for me." Kay pointed out, spotting his muslim companion, a merchant, trying to move quickly into the city.

"...!" His companion tried to increase his pace, but another Templar Knight quickly came up and blocked his way.

"Are you with him?" The Templar asked with a french accent.

The merchant pursed his lips, intimidated by the towering presence of the fully armored Templar, before pretending not to understand English.

"Can you confirm you went with this man?" The Templar asked him in Arabic as the man shrunk in fear.

"N-No."

The Templar leaned closer, looking straight into the merchant's eyes through their helmet.

"N-No, good sir! I swear to Allah I don't know what that crazy man is talking about!" The merchant replied as Kay shot him a glare.

"Well, he insists." The Templar told the one standing in front of Kay.

"Let him be, then." The other Templar replied as Kay blanched.

"What?! You're letting him go just like that?!"

"We've verified his identity as a merchant."

"And what if he wasn't?"

"Then he would have shivered as if he was standing in the chilling cold of Sweden under Geoffrey's stare. You are a lot more suspicious, and until you provide us information, Acre is closed off to you."

"Oh, for…"

"Leave, or we shall do it ourselves." The Templar Knight spoke as the three of them unsheathed their swords.

"...Bastards." Kay spat out as he turned around and walked off, taking a swig of the bottle he'd bought from a tavern on the way.

They're on their last legs anyways. Heard the Moorish kingdoms are cornering them with each passing year, and it won't be long before these cities fall in their hands. Kay thought as he walked, soon finding himself amongst the desert sands as Acre started getting more and more distant.

With that, Kay fell back to his own thoughts about the past.

It'd been days since he found himself summoned to a world of chaos, with numerous factions of servants causing havoc. There was Ozymandias who was creating his own king of Ancient Egypt down towards the Nile rivers, there was Richard the Lionheart and his crusader army residing in Jerusalem, and there was of course, his faction…

…The Lion King's knights, where he and his fellow knights were summoned by the Lion King near Jerusalem.

What in God's name happened to you, Artoria? Kay thought, feeling chills down his spine as he remembered seeing the Lion King.

Watching his little sister stand before him, having ascended as a Goddess and being stripped of her humanity…

Words cannot describe the sheer horror I felt looking into her eyes. Kay thought. It was as if all his fears about King Arthur had been given physical form as the Lion King. And after the Lion King expressed her goals for humanity, Kay knew he was not going to be her ally.

After hearing what the Lion King intended for Humanity, Kay had nothing but disgust left in his heart.

I refuse to call that…that thing Artoria. Kay thought with a disgusted grimace. The Lion King may have Artoria's body, but really…his sister had died at Camlann, and the Lion king was nothing but a walking corpse that did nothing but scare him.

He knew Artoria would never agree with the Lion King's plans. And so, he would not join her. He knew some of the other knights would join her, and he might even die at the hands of one of them. But he was not going to join the Lion King.

That was the decision he'd made at Jerusalem.

And yet I cannot follow it through. Some knight I turned out to be. Kay thought.

He couldn't help it. Even after assuring him so many times that Artoria Pendragon was long gone, and the Lion King was all that remained, it didn't help easing the reluctance in his mind of fighting against Artoria.

No matter the timeline, Kay would always love his little sister. Even after he tried to distance Artoria from the Lion King, those memories of their childhood would come rushing back as he would start seeing a younger Artoria standing with that pure, innocent smile of hers instead of the Lion King.

So, after he decided, Kay saw that he couldn't do it. He couldn't bring himself to take up arms…

…So he ran away, like a coward.

Kay flashed a bitter smile.

I shouldn't be surprised. This isn't the first time I abandoned Artoria to her own vices. Kay thought before his heart grew heavy and his smile turned into a sad frown.

"Artoria…" He muttered somberly, imagining her younger self walking by his side, irritating him to no end with her endless speeches about kingship.

How I wish I could go back to going on adventures with that pig-headed buffoon again. Kay thought with a sigh.

But there was no use. It would really take a miracle if he one day found himself…

"...!" Kay suddenly felt a tug on his spirit core.

He raised his right arm to notice it was dissolving into mana particles.

"What's going on?" He spoke in a panic.

Why am I dissolving?! My spirit origin's not even damaged?! Kay thought, as half of his body had already dissolved.

Kay then smirked.

"At least I won't have to get down to the mess of battling the Lion King…" He spoke, before he quietly vanished from the sands, never to be seen in the Holy Land again.

Immediately, Kay noticed he was in a dark prison cell, lit only by the torches in the corridor outside, kneeling and looking down to the ground.

A prison? Wait a minute…did I just get summoned? Kay thought, noticing a summoning circle.

Getting summoned while he was still materialized was certainly odd, but Kay was no magecraft expert. Merlin can handle that headache for all he cared.

Well, time to say my piece. Kay thought.

"Servant Saber has answered your summon. I ask of you…" Kay spoke, before looking up at the person who must have summoned him.

"Are you my…Guh!" Kay spluttered as he noticed who was sitting in front of him.

Blonde hair. Green eyes.

I-It can't be… Kay thought as his mind grind to a halt, the servant having completely forgotten his sentence as he looked at Artoria Caster.

Artoria and Kay stared at each other dumbfounded before Kay spoke.

"...Artoria?"

A/N: Hello to new readers. I am Hsuyaa, who's been on this site for a year now. My other stories are all crossovers, so if you don't read any fate crossovers, then this must be the first fic you're reading from me, hope you enjoy it. And yes, this is a LB6 fanfic, whose reasons I've listed below.

And to those who've read my stories before: This is the result of a promise. I'd promised that if I managed to get all LB6 servants in the first pull on their banners, I am going to publish an LB6 fanfic. And guess what? Oberon and Barghest were welcomed into my account today. So, as I promised, I'm giving you guys another fanfic. Besides, I think I need another story before I can start getting my groove back, since I'm still struggling to take forward the other three. I'll make sure things are much better by August, and I'll get down to a schedule in updating my four stories now.

But anyways, as you can see, the fic's premise is 'What if Castoria summoned Sir Kay during the night of Tintagel's destruction?'. I was considering to choose between either Kay or EMIYA, but considering Shirou and Artoria is pretty much a common trope now, I wanted to go for the dynamic with a lesser known character whose relationship with Artoria is arguably as important if not more than that of Shirou and Artoria. Plus, I wanted to explore Kay's perspective of Arthrian legends, considering that with how much we get from Lancelot, Tristan and Mordred, Kay's views of King Arthur aren't as deeply explored. So, I just wanted to write a fanfic with Kay as the protagonist.

So, Kay from Camelot Singularity gets summoned to the British Lostbelt by Artoria. I may have bended the nasuverse rules a bit here in regards to summoning, and I'll see if I can come up with a plausible explanation on how the hell Kay made it into the British Lostbelt.

Hence, we now get to see Artoria's adventure with Kay by her side. I may have to play around with the timeline a little bit to ensure Chaldea comes into the story a bit later, and I probably will change LB6's storyline in this fanfic (Because as great at LB6 is, I want to write my own storyline taking place in Faerie Britain). I'll also be fleshing out the world of Faerie Britain a tiny bit more, maybe add some political flags, military classifications, customs of the different faerie clans and a little bit more events filled into the history (Since again, I am a history nerd who loves the world of Faerie Britain, and wants to add some of my own touches to further flesh it out and fill in the gaps.)

Hope you guys enjoyed and constructive criticism is appreciated.

Foot notes:

Flag of Oxford: Now, in real life, Oxford's coat of arms features a red bull. But considering that Lostbelt Oxford is the capital of the Fang Clan's Duchy, I included a wolf as well, since most of the fang clan faeries are shown as Werewolves. The Wolf and the Bull is a homage towards both Lostbelt and PHH Oxford, while I think Morgan's spear would probably be her symbol (Although I'm thinking of designing a separate flag for Lostbelt Camelot). The spear is placed above Faerie Oxford's symbol to indicate Morgan's higher position as the High Queen. The dark blue colour is just a nod to Oxford University.

Crusaders in Acre: Acre, if you know your Crusader history, was the main city for the Crusaders in the Levant. Considering the Teutonic Order was founded in Acre, I believe Teutonic knights would be the largest military order in the city in terms of numbers, while the Templars would remain as elite units. Not much to expound on that.