So, a nice little crossover. Takes place during the Horcrux hunt, after godrics hollow, but before they find the sword. In an attempt to grow stronger, Harry inadvertantly summons a servant.

War of the Grail chapter 1

The Summonings

Harry sits awake, watching the area surrounding the tent. 'How am I supposed to do this?' he thinks as he grips Hermione's wand, 'I can't beat Voldemort.'

He peaks his head into the tent, where Hermione was sleeping soundly. He takes her beaded bag and brings it back to the table outside.

Emptying it of its considerable library of books, he browses over the titles until something catches his eye. Rituals of the Great by Andreas the Invincible.

He flips through the pages. 'Maybe something on here can help." he sighs. On one of the last pages, Harry notices the ritual of the mighty.

Rumored to be the source of the great wizard Merlin's strength, this ritual is widely unknown as its difficulty is unprecedented, yet it does not cross the line of dark magic. If followed EXACTLY as written in this book, your magical power will easily surpass your wildest dreams.

Harry's heart beats faster than it had since he'd gotten the sorcerer's stone in his first year. Despite the supposed difficulty, it didn't seem too complicated. He needed some chalk to draw the circle, some external source of magic, and a single drop of blood.

He quickly read the section about the external source of magic, and he thought it might have been the answer to his prays. According to the book, a horcrux could potential be used, but would likely be destoryed in the process. His hand grabbed the chain around his neck, and he racked his brain until he found the spell he needed.

He conjured some chalk and began drawing the circle, and every symbol exactly as it was written in the book. Once he was confident that everything was perfect, he removed the horcrux from his neck and placed it at the center of the circle.

"Here goes nothing." he sighs and takes a knife from Hermione's bag. He reads the ritual again, and starts chanting. When he'd reached the correct point, he sliced the knife along his finger and let the blood fall on the locket.

Instantly the white circle turned red, and all of the symbols rose off the ground, spinning wildly around him. Harry grinned as he imagined that he might finally be able to defeat Voldemort.

Something went wrong, as the circle began glowing, and the ground beneath it seemed to disappear. Someone rose out of the circle and sneered, "You're my master? Just great."

"Who are you?" he gulps as the man stepped towards him. His black hair reminded him of Snape, but his facial features made him a dead ringer for Phenias Nigelus Black.

"Assassin." he smirks, and Harry's hand burned. Looking down, he saw a strange red mark burned onto his hand, "Damn and I thought you might not be the one. Well, I suppose that we're in this together, Master."

"Master?" Harry asks, and the man faceplams.

"Fantastic. I get summoned by some clueless kid." He says angrily, "Well, too late now. I guess I can give you the basics. Right now you're involved in a war."

"I know." Harry says.

"You know?" he stares, "You know that you're involved in the Grail war?"

"What's the Grail war?" Harry gulps, and the man glares.

"I knew it. You're clueless." he sighs, "Right now, you are one of seven masters vying for the chance to have your wish granted."

"Wish?"

"If you prevail, anything you wish will be granted." he smirks, "That is, if we win."

"What about the others?" Harry asks, "What do I have to do?"

"Nothing." he sneers, "Masters don't fight. That is the job of the servants."

"That's you?" Harry says.

"Yes. I am assassin, one of the seven servants." he sighs, "The others are Saber, Archer, Lancer, Rider, Castor, and Berserker. Other than their names, I don't know anything about them."

"So what do you have to do?"

"It's a war, and I'm an assassin." he smiles, "What do you think I do?"

"So the servants kill each other?" Harry asks.

"Basically, though my skills are slightly below average, so I have to find some other way to win." he smirks.

"How's that?"

He smiles and disappears, reappearing seconds later with a silver knife to Harry's throat, "A servant is no threat if you neutralize the master."

Harry gulps, but the knife leaves his throat, "Regardless, for the time being we are a team. So I suppose I'll have to let you live."

"Harry?" Hermione calls from the tent, "Who else is out there?"

"You are sure of this information?" Voldemort says calmly.

"Yes my lord." Malfoy bows, "We received a powerful surge of magic inside the forest of dean. I checked to make sure, but it was Potter."

"Do we know the source of the surge?" he smiles.

"I do not know." Malfoy bows.

"I do." His wife says quietly from the doorway.

"Speak." Voldemort glares.

"Bella should know as well. The Blacks are an ancient family. One of few who still practice the old ways," Narcissa says and her sister gasps.

"The war? It's started!" she says gleefully.

"What war?"

"An ancient competition called the Holy Grail War. Wizards summon incredibly powerful servants to do battle on their behalf. The winners receive whatever wish they desire." Narcissa says calmly, "Our mother taught us from a young age that the war would be enacted during our lifetime, but I'd all but forgotten about it before today."

"My lord." Bellatrix bows, "Cissy and I could summon servants who would happily fight on your behalf."

"Do it." he smiles, "And I shall as well."

Narcissa begins drawing the circles from memory. Her mother had drilled it into her mind. Every line, every symbol flowed effortlessly. Meanwhile, Bella was informing Voldemort about what would be required to summon the servants.

She drew three circles, one for each of them. Her husband and son stood nervously on the side of the room. In her circle, she made a minor change. A single symbol was changed that could lead to her death. 'I will protect Draco, even if I must die to show him what he is becoming.' she thinks resolutely.

She places a small golden pendant, the last of the Black heirlooms shed received, long prepared for this very reason at the center of her circle, just covering the changed symbol.

"Bella, do you want the cloth or the stone?" she asks.

"I shall take the cloth. The stone magic will give a far stronger servant to my lord." she calls back.

She places the piece of black cloth at the center of the circle, and the clear stone in the last circle. "Everything is ready, my lord." she bows.

"Excellent. Then you will go first, Narcissa." he smirks. She walks to the center of her circle, knife in hand and begins chanting. St the right moment, she slices her finger and lets the blood drop on the pendant.

The white circle turned pitch black as a person rose out of the shadow. He was taller than she was, though not by too much, with untidy black hair. His face was masked in shadows save his eyes which glowed red.

Voldemort glared lividly at the man, "James Potter!"

James stands unmoving, staring into Narcissa's eyes, "Are you my master?"

"What is your name?" she asks, fully aware of the result.

"Berserker." he answers as the command seal is burned into her hand. She becomes overwhelmed by the weight of his madness, taking nearly all of her willpower to maintain consciousness. Remembering her mother's words, she allows the madness to almost completely engulf him, so as to lessen the strain on her own body.

Voldemort continues to stare angrily at the man, but motions for Bellatrix to continue. She likewise completes the ritual and the white circle turned blue. A man in a long black cloak, clutching a wooden spear, fangs visible through his lips.

"I am Lancer." He says after Bella asked, carving the seal into her hand. Seemingly satisfied that there was no risk to this ritual, Voldemort strode down to the last circle and completed the ritual. The result was a blue cloaked man with piercing brown eyes and a long white beard. His resemblance to Dumbledore was uncanny.

"Who are you?" Voldemort smiles.

"I am Caster." he answers.

Narcissa smiles slightly, glad that he hadn't gotten saber. The strain of maintain berserker became too much for her and she blacked out.

"Neville!" Augusta Longbottom called, "Come down here! We have something important to discuss."

Neville walked down the stairs of his house, "What is it?" he asks.

"It is time for you to fulfill a Longbottom family tradition." she smiles, "After today, you will truly be a Longbottom man."

She leads him into her study, where she had painstakingly drawn the circle for him to summon a servant.

"Neville, the grail war has begun. You know what you have to do." she smiles, handing him a gold ring with a large ruby.

Neville nods and places the ring in the center of the circle. He chants from memory and the chalk glows gold. A man in golden armor and a silver sword appeared, bowing to him, "Are you a master?" the man asks calmly.

"I am." Neville says confidently, "Who are you?"

"Saber." the men replies, drawing his sword and presenting it holy first to him, "And I swear that I shall assure your victory in this grail war."

"Thank you." Neville smiles.

"Well done Neville!" his grandmother claps him on the back, "No Longbottom has ever summoned saber before!"

"Thanks gran." he smiles, "And thanks in advance for your help, Saber."

"Naturally." he smiles warmly.

"I believe you need to know something that I shouldn't, so I'll wait outside." Augusta laughs, walking out the door and shutting it behind her.

"First of all, which spirit are you?" he asks.

"Godric Gryffindor, of the founders of Hogwarts at your service." he announces bowing to Neville, "Unless I'm very much mistaken, you are in my house, correct?"

"That's right." he smirks, "Gryffindor and proud of it."

"Very good." he smiles, "Now would you mind if I ask you a question?"

"Go ahead." Neville says.

"What will your wish be?" Gryffindor asks, "It makes little difference as I will fight regardless of your wish, but I wish to know the type of man you are."

"My parents were tortured until they lost their minds." Neville says quietly, "My only wish is to save them."

They were silent for a moment and Gryffindor says happily, "I couldn't have asked for a better master! You have my word that I will fight Merlin himself to make your wish a reality!"

"I can't thank you enough." Neville sighs, "Could you enter spirit form? I have to go back to school tomorrow and I'd rather not have to explain why one of the founders is following me."

"Certainly, but remember that I'm only one word away." Saber says as he disappears.

Luna wakes suddenly from her sleep. She'd just had the strangest dream, but she knew what she had to do. She took a piece of chalk and began drawing on her bedroom floor. Every symbol was so vivid. She effortlessly recreated the circle she'd seen in her dream, and took her treasure, a single hair from a crumple horned sronack to put in the center.

She chants the words that appeared in her mind, and at the very end, grabbed the knife she keeps under her sleeve and pricks her finger. The blood drops onto the circle which turns purple. A man appeared in her bed room, grooming a beautiful unicorn she knew was not there before.

"Hello." he smiles, "My name is Rider." as he says that, the back of her hand burns.

Hermione peaks out of the tent when she hears Harry talking to someone. 'Could Ron be back?' she wonders.

"Harry, who else is out there?" she says, and gasps when she sees a strange man with a knife behind Harry, "Look out!" she shouts, tackling him.

"Hermione, wait!" Harry says as they land in the center of the circle he'd drawn, knocking the horcrux outside the wards.

"Get off of me, you silly girl!" assassin yells as Hermione continues holding him. He throws her to the ground and jumps away, "Fine, be that way!" he says, throwing a knife at her.

"Hermione!" Harry shouts dismayed. She tries to move out of the way, but the knife pierces her left hand. She screams as the blood touches the circle and it turns green.

Harry watches as a white haired man with a long red coat appears beside Hermione.

"Who are you?" Hermione mutters in pain.

"I'm archer." he says, "I'll take care of them." he jumps towards assassin, and twin blades appear on his hands.

"Hermione!" harry shouts, running to her side, "Are you okay?"

"What's gong on!" she asks.

"I'll explain later, but we have to stop them." Harry says.

"Assassin." archer smiles, "Quite unlike you to take an active role in combat."

"And it's quite unlike you to attack at close range, archer." he sneers, "Normally I'd run when confront, but I'm sure that I can beat you."

"Just try." archer laughs, throwing both swords at him. Assassin dodges and throws a knife towards him, which is blocked by an axe.

"What is an archer doing with swords and an axe?" assassin smirks.

"Desperate times call for desperate measures." he shrugs, clapping his hands and creating a bow.

"I couldn't agree more." assassin smirks, drawing a glowing silver dagger with a green tip.

"I am the bone of my own sword." Archer chants, and the sword he created turned into an arrow.

"Dagger of the Serpent King!" assassin shouts, lounging at him.

"Stop!" two voices shout and both servants are brought to their knees.

Harry gasps as the mark on his arm burns again, and he's amazed that one of the marks looks darker. "What are you doing!" assassin shouts.

"He's right!" archer shouts.

"Just calm down and listen!" Hermione says, tears streaming down her cheek.

Archer sighs and the bow and arrow disappear. Assassin likewise lowers his dagger.

Harry brings Hermione up to speed about everything assassin told him. She mostly just nodded and winced whenever he tightened the bandage on her hand.

"Why did you suddenly stop when I said to?" Hermione asks archer.

"She's got a point." Harry says, "You both seemed eager to fight, so why would you stop just because we said to?"

"We had no choice." archer sighs, "When you give an order with a command seal, we cannot disobey regardless of the order. He should have told you that." he says, glaring at assassin.

"What can I say? I must have forgotten." he shrugs lazily.

"So you two can't fight each other?" Hermione smiles.

"Not until one of you release the command." Assassin glares, "And if you do, the other wouldn't be able to fight back. It would be perfect."

"Harry, how about we work together? Even if we don't know anything about the grail war, at least they can help with the horcrux hunt." Hermione smiles and Harry blots to his feet.

"Where is it? The horcrux was right on the ground!" he shouts, frantically searching. Hermione quickly helps him.

"Potter's in these woods somewhere!" a gleeful shout echoes through the woods, "Burn them to the ground!"

"Bellatrix!" Harry seethes at the woman that murdered his godfather.

"Harry, we have to find the horcrux and get out of here!" Hermione says, "You keep looking, I'll pack the tent."

Harry searches as the tent collapses behind him. Finally he sees it just as three people on black robes come into view.

"Are you sure he's here?" a wispy voice asks.

"Of course he's here. Lancer, find him." Bellatrix grins.

"There are wards over there." the tallest man says. Harry pales as the three start walking towards them. The locket was outside the wardline, so they'd be able to see him if he tried to grab it. But he couldn't let them take it back to Voldemort.

Harry steels himself and jumps out of the wards, grabbing the locker and shoving it in his pocket.

"There he is!" the wispy man shouts, sending a curse towards him. Harry ducks and the man falls over, bleeding profusely.

"Potter!" Bellatrix laughs, "Since when did you grow a pair?"

"That wasn't him." the last man says, throwing his wooden spear through a tree, "Come out, assassin. You can't hide from me!"

"Lancer?" assassin smirks, "I must be getting rusty if even you can find me."

"Nothing can hide from me. Which is why I know that archer and his master are just on the other side of these wards." lancer smiles, displaying his fangs, "Do you intend to fight me?"

"Nope." assassin smirks, grabbing Harry, "Just needed to buy time until they were ready to go."

Bellatrix yells after them as they run through the wards and grab Hermione's arm. She spins and they disapprated just as Bellatrix destroys the wards.

The servants are gathered. Now, the war has begun. R&R!