A/N: Hello Merlin and Percy Jackson fans! All of you out there reading this, you are my new favourite people!

So, the plot bunnies attacked me rather viciously tonight, while I should have been studying for a math test. But those bunnies were persistent. Thank them for this.

I hope you enjoy the prologue! I will try to update soon, but I make no guarantees.

The spells in here are either in Old English or Ancient Greek (I used both), and since I don't speak either, I used an online translator, so they most likely won't be accurate. If anyone speaking either language is willing to correct my mistakes, please do so!

DISCLAIMER: I, Jayfire, solemnly swear upon the River Styx that I do not own Percy Jackson or Merlin. That is all.

Prologue

"Ic ábannan uppan þæsealdhláford fultumas sylfum þæs Brytengrúnd," a beautiful dark haired woman, obviously a powerful sorceress, murmured over the edge of an endless pit – Tartarus. "Ic ábiddan ðú, eálá cræft dæl, æt ágiefan þæsálibbend Ic áscian. Ic ábannan uppan þæsrihthláford ánwealda sylfum þes ágenland, þæságend sylfum frumræden. Ic ábannan uppan þæscræft anferth Kronos."

For a minute, nothing happened. The dark cavern that was home to the entrance of Tartarus remained just as cold and imposing as ever. Even the sorceress' breath was still. Not a single thing dared to stir the air in that intense moment of anticipation.

Then it happened. The already chill air dropped another ten degrees, and if there were a single living thing with an ounce of common sense in proximity to the cavern, it would have scampered off into the Field of Asphodel whimpering, its tail between its legs. But the sorceress, having lost all sanity many years prior, let a cruel smirk grace her dark red lips.

"Yes. He is coming," she said to herself in contentment.

Another few heartbeats passed, the temperature still decreasing slowly, and the feel of an ancient and powerful presence began to encroach upon the perimeter of the pit, spreading outwards by a centimeter every few seconds.

Suddenly, the already changing atmosphere's chilling air dropped another few precious degrees, the heavy presence approaching wakefulness more and more by the second became impossibly heavier and the pressure rose sharply with a pop! of the sorceress' ears.

"Really, milord, must you do that?" she asked the dark shape now looming like a shadow out of the pit.

"Why, of course I must, Ailith," the giant form said, a hint of annoyance in his voice. "Why did you wake me? I was not due to reform for another three centuries! I was quite enjoying my break from those demigods. I can smell the sea-spawn, even from here."

"Yes, well," the witch, Ailith, started, "I believe now is the right time to act. Even though the Rómwealh and the Crécisc have united, they are weak. If you are to be guaranteed a victory against the gods, the best time to take Olympus is now."

"And what would you know about strategizing and determining the best time to attack? You are nothing but a sorceress," the titan sneered.

"With all due respect, milord, I must inform you that I am much more than a mere sorceress. If it were not for me, those wretched half-bloods wouldn't have come so close to defeat. Without me, Gaea would never have even had the strength to rise from her slumber," she replied coldly, an unspoken threat in her otherwise cold and emotionless voice. "Besides, names have power, do they not?"

"That they do," the titan conceded reluctantly.

"It is, therefore, no coincidence I was named Ailith, which means 'seasoned warrior'," the sorceress said smugly.

The smooth and convincing words spoken in the soothing, yet scalding and condescending, voice of the most powerful sorceress since Morgana Pendragon herself did exactly as they were meant to. The looming, shadowy form of the titan slowly solidified, until what looked like a twelve foot tall human being floated calmly above the pit.

"Ah, how good it feels to be back in my true form," the titan said.

He looked completely different from his human host of a few years prior, Luke Castellan. The only thing that remained the same were his glowing golden eyes. His hair was now a long, stringy black that hung over his face, giving him a shifty and mysterious air. His jaw was stronger and more of a square shape than Luke's had been, and his smiled was one thousand times crueler. He had sharp features, high cheek bones, joined together by a straight, statuesque nose. The titan had broad shoulders and strong arms and chest. He was clad in obsidian Greek-style armor with specks of constantly shifting colours. In his right hand he held the scythe he used to cut down his father; the scythe his own children had used against him. He wore sturdy black combat boots that could easily rival the pair Ares wore. Draped over his shoulders and hiding most of his face was a pure black cloak.

A second later, everything but his armor changed. One moment he looked like, well, like what the Lord of Time should look resemble. The next, he looked as if he was William Wallace wearing magical Ancient Greek armor. After another few seconds, and he looked, except for the armor, like a samurai warrior. His form was constantly flickering and changing much in the same way time changed.

All in all, the titan looked very imposing.

But it wasn't the constant shifting of his form that intrigued Ailith; it was the swirling patterns of colours that never once stopped their strange dance which caught the sorceress' attention.

"Yes, yes. I can see how you want to learn the secrets to my armor," the titan said. "The colours, always shifting and changing, those are the different times. The blue one is the time of King Arthur, the red is the Golden Age of Greece. They shift even today because everyone, in every single time period, is happening at once. There is nothing that has happened already, it is all happening."

Ailith could only gap at the titan's words. From what she'd heard while working with Gaea, all titans were dense and idiotic. Clearly, Mother Earth had been wrong. Kronos most certainly wasn't an idiot. He was a genius.

"Time isn't set in stone," she murmured to herself, suddenly understanding the words her mother had whispered to her every night.

In that moment, she understood. She knew exactly what had to be done to ensure their victory. She relayed her plan to the titan who now stood directly in front of her, uncomfortably close.

"I see your point, sorceress, but I do not have the power to perform such a task. Even at my full strength, I would not be able to do what you ask of me," Kronos said reluctantly. It wasn't like him to admit the impossibility of something when it questioned his own strength.

"Maybe not on your own," Ailith ventured hesitantly.

"Whatever do you mean?" the titan questioned.

"Perhaps, if we combined our powers, we could manage it," she suggested. She knew, already, that if they both put their powers together, their strength would be enough to perform their urgent task.

Kronos considered this possibility for quite a while. Before long, he spread his consciousness out and grasped at the thoughts flitting through the head of the young witch he now faced.

"We shall combine forces, then," he conceded, "but on one condition. You must swear your loyalty to me on the River Styx. If you do not, then I shall strike you where you stand and take both Camp Half-Blood and Camp Jupiter without your help."

"I, Ailith Elfrieda, swear my loyalties to the titan Lord, Kronos, on the River Styx," the witch said slowly, clearly annunciating each word.

"Good. Then let us begin."

Simultaneously, both great forces standing at the edge of Tartarus, incanted their own part of one of the most powerful spells.

"Ic álænan mín fífmægen æt ætstæl þes cræft feorhberend. Frumræden beóþ gebygu æt he will and forgiefan þæs oferlád sylfum þára hé brandhord. Rýne sylfum drýcræft, éaðmódian mec," Ailith softly uttered and all of the magic her body could manage to let loose at one time immediately flowed out of her outstretched hand and into the titan's body to combine with his own, primal magic.

Meanwhile, at the same time as the sorceress cast her spell, Kronos incanted his own. One he had known since the first time his unsettling golden eyes had opened, but had never dared use.

"Ἀφίημιἀμφίαλοςδιχάς- αἷμα ἀναμολεῖν ἄλλοτε, Ἀζᾶνεςἀμαυρόςδέκας Κάμελοτ. Περσεύς Ξακκσον, Ανναβεθ Χασε, ἄπαγεἄμοχθοςνύ, ἑνοποιέω βιθ μεδιεβαλ."

As soon as the words of magic left the lips of the sorceress and the Titan Lord of Time, two unlucky demigods found themselves being sucked into an uncomfortable swirling black vortex, travelling from their own time into one which was very far and very different from their own.

Of course, these two unfortunate demigods just happened to be Percy Jackson and Annabeth Chase.

A/N: I hope you all enjoyed the prologue! Drop me a review and let me know what you thought! (hint, hint)

Here are the translations for the spells:

Ailith: (Old English)

"I call upon the ancient forces of the Earth,"

"I ask you, oh great pit, to yield the one I seek. I call upon the rightful ruler of this land, the lord of time. I call upon the great titan Kronos."

Ailith-surname of the sorceress; means seasoned warrior.

Elfrieda-name of the sorceress; means of powerful magic.

"I lend my powers to aid this great being. Time shall bend to his will and allow the transfer of those he desires. Elements of magic, obey me."

Kronos: (Ancient Greek)

"Send two half-bloods through time to land in the darkest decade of Camelot. Perseus Jackson, Annabeth Chase, begone from the now, merge with the medieval."

Thank you all so much for reading!

See you next time,

Jayfire~