Disclaimer: I do not own RWBY or Fate Series. They belong to their respective owners which are Rooster Teeth and Type-Moon if I'm not mistaken. I don't own anything, except a laptop and a NA FGO account.

Prologue

This lore had been passed down from generation to generation.

Two Gods, the God of Darkness and the God of Light created the world. The Brothers created the land, the sea, and the sky. They placed the sun to illuminate the day and the moon to illuminate the night. The God of Light pushed his power into the land, giving lives to plants and animal alike. The God of Darkness created Grimm in turn, an act meant to balance the scale of life and death. Human being became their next creation. Together they molded a unique being that continuously tether between good and evil.

Centuries passed by, and the world prospered. Kingdom rose and culture spread. Tales of bravery of human against the force of evil flourished. Until one day, it all stopped. A woman filled with grief over her lover's death pleaded the Gods to give her beloved a chance to live once more, only to be refused. The woman then raised armies against the Gods, angered by the Gods' response. Disappointed by the human rebellion, the Gods departed from the world, leaving behind a monstrosity, The Beast, to clean the world of the old human and to prepare the land for a new creation.

The Beast sprouted 72 great Demon from its bodies. Demons filled the land, the sea and the sky. They towered over the mountain like a great pillar. No army, no hero managed to halt the Beast nor the demon advance. It continued to fill the world with deaths and horror.

As humanity was about to breathed its last, an oracle appeared.

"Oh brave one cometh forward, we shalt bestow thee the power to square backeth against the dark. Thy believeth shalt fuel us and our legends shalt strengthened thee. Speaketh thy holidam. Thee shalt becometh every valorous in the world of the death. Thee shalt did lie out all evil in the world of the death. And thus we shalt giveth thee blade to dare thy fate!"

In response to the oracle, eight heroes banded together and performed the ritual. They made a pact to the spirit of legend, spirit from another world, another history. They each swore an oath to the spirit and in return, the spirit granted them strength bordering the realm of legend.

The Saint of the White Flag

The King of Knights

The Divine Ancestor

The Lone Meteor

The Sun Incarnate

The Old Man of the Mountain

The Mage of Flowers

The Hegemon of Vast Plains

These Heroic Spirit granted strength to the heroes of old to counter the Beast. After a long and grueling fight, the heroes managed to vanquish the beast, sealing it forever inside a deep abyss.

From that moment on, humanity begun a new page to their history. Those with deeds worthy of legends crossed into our world, forging contract with those they deem worthy. They are our guardian, our savior, our Patron, the Heroic Spirits. They brought with them gift of knowledge, power, and prosperity to us, their Protégé. And with the Protégé at the lead, Remnant welcomed a new era of Peace and Prosperity.

###

"The end." With the story over, Juniper Arc closed the book and smiled to her children. She took a glance at each of them to gauge their reaction. Rose, the second daughter, was looking quite bored and already half asleep, judging from the way she is swaying back and forth. Well, to be expected really. Rose has past the normal age for hearing bedtime story and she has listened to this story probably around a hundred times before.

Juniper turned her attention to the other three instead.

Jaune, Verte and Sapphire returned her glance with a look filled with joy, excitement, and impatience bundled into one.

"Mommy can you tell us another story?" Jaune, the oldest between the three, spoke first. He was the one most taken by her story. Currently eight years old, it was to be expected that her little boy would be excited hearing the story about heroes.

"Hmm, I don't know Jaune. I already promise Daddy that you will all turn in soon so that you can practice your magecraft tomorrow morning." She let out a fake yawn and closed her eyes, pretending to fall asleep. "Mommy is really sleepy too. Can you wait until tomorrow?"

"Mommy please, I promise that I will sleep after this one! Promise!"

"Yeah mommy! Tell us another one."

"Please, Please, Please!"

"Mommy is pretty tired. Oh how mommy wish that someone will give mommy a big hug to wake her up."

All three of them scrambled toward her in an instant, almost tackling her to the ground. Even Rose who seemed to want nothing more than to go back to her own room joined in on the chaotic group hug, enveloping the small statured Vert in the process.

Juniper let out a giggle at her children antics. They are so precious when they are this young.

"Alright! Mommy is all charged up and ready to go!" The three young ones let out a loud squeal while Rose futilely tried to hush them. "Okay what story should it be next?"

"Argonaut! No wait, Heracles! Tell me about Heracles mommy!"

"I want to hear King Arthur tales!"

"How about something short like how Edison discover electricity?"

"Booo! Rosie's pick sucks!" "I don't want to hear boring things!"

"Alright, alright no fighting girls." Juniper interfere before her daughter resorted to name calling, or worse, crying. She then looked at her only son who is visibly raking his brain for the story that he wanted to hear the most. "How about you Jaune? Whose tale do you want to hear?"

Jaune visibly surprised by her attention on him, began to murmur names after names, heroes after heroes. Juniper patiently waited for him to answer clearly, until finally Jaune decided on one particular hero.

"Uhm… Mommy, can you tell us about The Saint of the White Flag? About Jeanne d' Arc?"

The Saint was a famous hero, one of the original to cross into their world. She was idolized by the people of their family who had long adopted her way of life. Juniper can confidently state that the Arc family was the most French-like Christian people on the face of Remnant.

"Oh Jaune, are you sure? Haven't you heard about our family Patron over and over again from daddy and grandpa Arc?"

"Yes, I mean, I like Jeanne, She's so cool and our names are similar! I want to be her Protégé when I'm older, mommy"

Juniper can feel her face stiffen hearing those words. It was a childish declaration but hearing Jaune said it… Knowing that your son dream was unreachable, knowing that if other people hear him they would only pity or jeer at him, knowing that her blood was the cause of it, Juniper can feel an invisible weight settling down her stomach.

"Mommy? Are you okay?"

"Oh! Sorry dear, mommy was preparing the story so it will come out well. You don't want Jeanne journey to get paused halfway, do you?" The children shook their head from side to side. Sapphire even covered her mouth, trying her best not to make noises.

"Okay, in another world long, long ago-"

###

Jeanne d' Arc, Maiden of Orleans, La Pucelle, Saint of the White Flag, she was one of the original eight heroic spirits that make contract with humanity. Her first Protégé named his family after her own family name, Arc.

Arc family would later become a noble house boasting powerful Patron, none other than Jeanne d' Arc herself. Generation after generation, one of their member would always be chosen by the saint as her Protégé. Her Protégé would then be chosen as the Head of the family, leading their family to glory surpassing the previous generation.

But as all things come to an end, the same goes for Arc family glory. In one instant, Arc family would turn from a noble houses into the house of failures, abandoned by their Patron. During the Great War, 85 years ago, Marcus Arc led the counter invasion against Mistral. Filled with rage at the death of his loved ones, he razed tens of settlement in Solitas, leaving a mountain of corpse at his trail. Only stopping when faced with the King of Mistral, the Protégé of the Great Hero Heracles.

Disgusted by her Protégé atrocities, The Saint never granted her blessing to the family again. For four generation following the Great War, not one Protégé appeared in Arc family. Their family was cursed, none of the Heroic Spirit ever deign them worthy. No matter how many talented children are born, no matter how they plead forgiveness to the Saint, no matter what they sacrifice, the situation did not change at all.

"So imagine my surprise when I saw it, Glynda" the current Protégé of the Mage of Flower, the supervisor of the Avalon Tower showed his deputy a pleasant smile. "I see that the Saint finally relented and give the Arc a chance to right their wrong. Oh, or perhaps she come back knowing that their family have right their wrong?"

"A vision from your [Clairvoyance]?" The deputy raised her eyebrow in curiosity.

[Clairvoyance C+], the headmaster personal skill, is a privilege given to one who contract The Mage of Flower. Glynda knew that the vision come at random and the headmaster himself has no control over what vision it will be. Sometimes the vision showed something easy to interpret, but most times it only showed a bunch of nonsense. This instance seemed to be the former one however.

"Yes, I saw a man with the Arc emblem walking through the dark, the [Crest] pulsing red on his hand, a flag waving in the distance." Ozpin fiddled with his Scroll, scrolling down a list that shows a number of names. It was the Arc Family register, most likely. "A man from the Arc family will make a contract with the Saint. It was an easy interpretation. A rare instance when my vision are obvious about its meaning."

Glynda could understand the headmaster eagerness. The Saint of the White Flag would be a great addition to humanity. Not only was she a powerful Patron, but her forgiveness for the Arc folly would mean that her assistance to be assured for years to come.

"Do you want to make contact with the Arc, Ozpin? To deliver the good news?"

"What would that accomplish, Glynda?" The headmaster let out a chuckle before putting down his Scroll. He already gave up on this endeavor. Locating the potential Protégé from the large number of Arc man is near impossible effort.

Firstly, he cannot make the visage of the man in his vision. Secondly, he does not know when exactly in the future the vision take place in. The man in his vision might not be born yet, for all he knows. Not only that, the Arc family effort to raise the chance of a Protégé appearing included giving birth to as many children as possible. In the last 80 years, not one of them has less than five children per family. Locating a single man out with those condition? Not a chance.

"As usual, the only thing that we can do is to watch out for the future." He looked out to the window, watching the Protégé training below from the inside of his tower. "With the [Advent] coming we will need every help that we could get Glynda."

Yes, the Advent. The calamity. The Evil of Humanity. The nightmare from centuries past will walk the land once more. The vision he had as one burdened with the memories of his predecessor from a time long long ago.

To protect the human order, Heroes need to be gathered once more.

Author Notes

This is my first story, a quite ambitious crossover between RWBY and Fate Series. Details will be explained at later chapter, but to make it clear:

All Character except the heroic spirit will be from RWBY

The term Servant and Master are replaced with Patron for Servant and Protege for Master. The Protege will gain power according to their Patron, in simpler term: it will be a Class Card fiasco for all the character.

Yes, I accept any input for the story including ideas for Patron and Protege pair. If you do have an input to give, please comment by all means. You don't have to, but I will really appreciate it if you also give a good reason for it. If I do implement your idea for the pair, i will make sure to credit you for it.

Lastly, I am well aware that both my English and writing skill need to be polished. I am Indonesian, so please go easy on me.

With that said, Thank you for reading this story, I hope that it will be a fun ride from here on out. See you.