Disclaimer: I don't own Harry Potter or any of it's characters. It all belongs to J.K. :)

It's been quite a time since the four greatest wizards of all times founded the school of witchcraft and wizardry of Hogwarts, where young wizards could learn how to control their power. For a long time, peace reigned free through the green and sunny fields of the school. However, it didn't last for long. A big black cloud covered the whole castle, hiding the sun that once shined brightly, when the four founders found themselves in disagreement.

Salazar Slytherin was sick of having his thoughts put into oblivion by the other three founders. Gryffindor, Ravenclaw and Hufflepuff were quite happy with the situation of the school, unlike him. Mudbloods were making friends with pure-bloods, and nothing could let Lord Slytherin more disgusted.

He would end this. Once for all.

It was a sunny Saturday when Godric Gryffindor walked by the black lake with his 17 year old daughter, Isabelle Gryffindor. Isabelle was his greatest pride. She was bold as her father, but nothing could deny that she inherited her mother's cleverness and beauty. Her red hair, witch was trapped in a golden tiara studded with rubies, fell to the middle of her back. She had a skin as white and soft as snow, and her eyes, like her father's were blue as the sky. Her posture was worthy a princess. And that was what she was to Gryffindor. A princess.

While they talked peacefully about her future, by the lake, an argument began in the Great Hall between the other 3 founders.

"Salazar, we've already talked about this. This school will host pure blooded and muggle borns as long as we think it's proper." Said Rowena peacefully.

"You? It's always you, isn't it! My opinion has been forgotten for too long now. I DON'T HAVE TO BEAR IT ANYMORE!" shouted Salazar.

"Can't you see, Salazar? These kids can't just be kept in the muggle world with their uncontrolled powers! Just think about the chaos!" sair Helga.

"That's why I say that we should exterminate all muggles."

Silence fell in the great hall. Helga and Rowena stared at Salazar in disbelief, as Godric and Isabella approached the three.

"What's happening here!" said Godric already annoyed. He knew what was coming next.

"Our friend once again disagrees with our choice, Godric." Said Rowena with a drop of sorrow in her voice.

"Not that pure-blood story again... Please Salazar, try to understand-"

"I've tried for too long, Godric, I really have. But I can't. To be perfectly honest it's not of my interest to understand your love for the mudbloods. For now, I'd be satisfied if you heard what I have to propose."

"We've already talked about this, and it's settled!" Godric approached daringly to Salazar. "And there's nothing you can do to change our opinion, Salazar!"

"Oh, nothing? Are you sure?" Salazar said softly approaching slowly to Isabelle "What about your beautiful daughter's future? Would you dare to risk it or would you miraculously change your mind?" he said touching softly the girl's neck, like a knife cutting her throat.

"Father!"

"You wouldn't dare, Slytherin!"

"Oh, I would. I-"

"I'D KILL YOU BEFORE YOU EVEN THINK OF TOUCHING A SINGLE HAIR OF HER!" Godric's bellow echoed through the great hall as he pulled Isabelle closer to him.

"Your words… got poison, Salazar." Finally said Helga, with tears in her eyes.

Salazar stared arrogantly at his partner's faces. Helga looked horrified. Rowena, which held her daughter's hand, stared daringly at him. And Godric was the perfect image of fury.

"So this is your final word?" He said finally.

"Yes." Rowena answered.

"So be it."

Salazar walked slowly by the three founders and the girl, and stopped by Godric. Looking with fervent hate into his eyes, he whispered slowly:

"They will die, Gryffindor. All of them. Even if don't finish this task, my heir will. And he will watch your reign of mudbloods fall, for he, himself, will destroy it, as the prophecy says. They will die. And there's nothing you can do about it."

"THEN I SHALL DIE AS ONE OF THEM!" answered Godric, with pure loathing, his right hand closed strongly around the hilt of his sheathed sword.

Without breaking eye contact, Salazar went to the middle of the empty Great Hall, and with a flip of his wand, the tables were pushed against the walls. The kids who have woken up by the loud argument, were watching the whole scene from the Great Hall's entrance doors, where now Rowena Helga and Isabelle tried to keep them out of the hall.
Isabelle looked over her shoulder a lot of times, worried with what would happen. Both, Salazar and her father, have always been good friends. She couldn't understand what was happening to Salazar. He never threatened her like he had today. Actually he never harmed her in any way. He was always like an uncle to her, and now it seemed like he'd kill her for power, with no regret, although she couldn't understand how her death could bring power to him, in any way. The mere thought brought tears to her eyes, but she had to keep strong, for her colleagues who were watching the whole scene right there.

"As you wish, then, my lord, Gryffindor." Finally said Salazar, bowing theatrically, with his wand in hand.

Godric approached also with wand in hand. They exchanged one last hateful glance, and attacked:

"Confringo!"

"Incendio!"

A big explosion erupted when both bolts of light met, making the students scream. The duel intensified at each second, in a murderous non-verbal clash of colourful spells and curses that Isabelle was sure she had never seen before. She could feel the power emanating from both wizards, and she knew what would happen if she just stayed there watching the duel.

She looked to her right, where her mother and Helga were desperately trying to take the students to their common rooms. She had to do something. Anything. No one could help her now, but she just couldn't just let the two men kill each other in front of the students.

So, she ran to the middle of the great hall, her heart racing in her chest, like a bird yearning to be released. She stopped really close to the line of fire. Then, everything seemed to happen in slow motion. Her father's eyes suddenly turned desperate as they found her eyes. She could hear him screaming for her to get out of there, but her legs wouldn't obey. She looked over Salazar, who had an evil grin in his face looking from Isabelle to Godric. When she shouted for them to stop, a bluish light came in her direction involving her whole body, like a cold jet of water. She saw her father running to her, but it seemed to be too late. When she looked to where Salazar was, he was already apparating.

The last thing she heard were distant howls, like her mother's terrified cry, and her father's despaired yell:

"Isabelle! My Isabelle! What have you done, Slytherin!"

And everything went black.

A/N: Hey guys! That's my first official fic, and I'm really excited! Hope you like it! So I was inspired to write this fic by Mozart4302's video in youtube about the Founders (you guys should watch it! It's awesome!) Anyway, tell me what you think! Tell me if I should keep writing!

And that's it! Kisses =*

silly-sunshine

PS: just some explanations: there's some AU because of Godric's marriage with Rowena. And I thought that Salazar could apparate in Hogwarts, like Dumbledore did in HBP, because he's a founder, he can do whatever the hell he wants, and stuff… xD