Disclaimer: Hi! I just want to say that I don't own either Harry Potter or Percy Jackson & The Olympians. I am simply borrowing them from J.K. Rowling and Rick Riordan.

Author's Note: This is something that just popped into my head a few weeks ago and I finally got around to working on it. I hope you enjoy it!

Prologue: The Wizard and the Goddess

545 AD

The Isle of Britannia was decidedly cold this time of year. Summer was long gone and winter was reaching its peak. Most of the locals rarely strayed far from their doors, preferring instead the warmth of their own hearths to the bitter, icy winds and snow covered hills. The harvest had been bountiful this year, so food was plenty and therefore they had very little reason to seek the company or aid of others.

But now these locals were fast asleep, for the sun had long since set and the moon had graced the sky with her presence for several hours. All the world was still as only creatures of the night were awake, but even they did not wonder too far from their homes.

Yet, despite the lateness of the hour and the coldness of the night, a lonely figure made its way along an old and worn path. It moved slowly and with care, daring not to disturb the peaceful quiet that surrounded it. It tread lightly, barely leaving any trace that it had journeyed there.

As it passed, the moon's cold rays revealed it be a man, his skin wrinkled and weathered with great age and care. His snow white beard was tattered and tangled as if it had not been combed or washed for many days. His long hair was not fairing any better. For many twigs and leaves had found a home in his hair and they did not show any sign of wanting to leave it. His clothes may have once been very grand indeed, but now they were little more than rags, leaving his frail skin exposed to the harsh elements.

Yet, he seemed not to heed the cold or the dark either. For his thoughts were far away on other matters and on happier times. His inner eye saw not the rough terrain on which he traveled, but rather the splendid stone walls of a tall and magnificent castle. It heard not the rustle of leaves as they danced with the wind, but rather the laughter of a merry youth. It felt not the biting, chilly air, but rather the rush of a warm summer's breeze.

He knew nor cared not how far he had come, for his feet had ceaselessly continued to carry him on and on while his mind revealed in times long gone. Yet these memories brought him little comfort, for a single tear sprang to life in the corner of his right eye. It was soon followed by another and another, until both his eyes brought forth a shower of tears. Soon, the burden of his tears were too much to bear and casting himself upon a desolate rock, put his head in his hands and wept.

"I warned you, did I not?"

A single, sharp voice spoke through the darkness, bringing an abrupt end to the man's tears. He slowly raised his head and where a moment before there had been nothing but the wind stood a woman. She was tall and imposing and unspeakably beautiful. She seemed perfectly formed and her body was clothed in long robes of purple. Her long black hair flowed in the wind, and her eyes held a hard, yet compassionate look as they rested on the old man.

"Yes," he answered, his voice frail and full of sorrow. "Yes, you did warn me. And I have no one to blame, but myself."

"You have a good heart, Merlin," said the woman, stepping forward and taking both of the man's hands in one of hers, "but even the best of intentions can cause harm and destruction."

"I know, I know!" he moaned, resting his forehead on her hand. "Why did I not listen to you, why? If only I had. None of this might have happened! Everything destroyed, because of me! Because I was young and proud. Curse my pride! I thought I knew better, better than the gods." He looked up and met her gaze. "Better than you, Mother!"

The woman smiled sadly down at him. "You are half-human, my son, and even children born of the gods are apt to think they know better than their parents. It is, sadly, the way of the world."

Merlin moaned again and the goddess reached out and gently ran her fingers through her son's hair. "If it is any conciliation, my son, I too feel your pain. I have watched you long and from a far. Many was the time that I wish I could have given you the guidance you desperately needed, but you know the way of the gods. I could not interfere. And more's the pity! Perhaps if I had been allowed to help and guide you, this would never have happened."

"It is not your fault, Mother," Merlin said, gently but firmly. "You did warn me, but I heeded you not. Magic is, as you didst tell me, best left to the gods and not to mankind. And I should have listened to you, Mother, you the goddess of magic, Hecate. You, who knows more about magic than any of the other gods, you were the one I should have listened to. Instead, I chose to listen to my own foolish heart! And now Arthur and Camelot are destroyed because of it. I am a miserable excuse for a demigod and an even worse failure as a wizard."

"You enjoyed too much power, Merlin, my son," Hecate told him. "As both a demigod and a wizard, you were a force to rival even us gods. The damage you could have inflicted is beyond imagination. Just be glad that only Arthur and Camelot paid the price, and not the entire world."

"Indeed," said Merlin, thoughtfully, but the next moment he drew back and recoiled in horror. "Mother," he said, his voice barely above that of a whisper, "mother, what if…what if because of my mistake…what if there are, or will be others?"

Hecate stared at him, puzzled. "Others, my son? I do not understand what you mean."

"Others like me! Other wizard demigods." The very thought made him shutter. "What if, unlike me, they don't have good hearts, or become accustomed to power and don't learn, or don't want to, control it? The world could be in danger!"

Hecate shook her head. "There are no others like you, Merlin. You are unique."

"For now," Merlin pointed out bitterly. "But there might be others. In years from now, children might be born of the gods to wizards and witches. Mother, we cannot let that happen!"

"And how are we to prevent it?" Hecate asked, her voice suddenly growing cold as a suspicion of what her son would ask of her began to form in her mind.

"The gods cannot have children with humans born of magic. They must not! The very future of the world depends on it."

"And how do you propose to prevent it?" Hecate demanded, her voice growing colder still. "The gods will not stop breeding with humans. We cannot. You know this. We have tried before to stop having demigod children and we and every time we have failed. And we cannot stop children being born with magic. Your own descendants care magic in their veins. Unless, you are proposing that we kill them."

"No!" said Merlin. "No, but we must keep them separate, gods with demigods and wizards. Wizards must not know that gods and demigods exist. And gods and demigods must be ignorant of the existence of wizards. They must not be allowed to mingle."

"Wiping the minds of wizards of the existence of gods and demigods is easy enough and the minds of demigods of the existence of wizards is easy enough, but wiping the mind of the gods? What you ask is impossible."

"Impossible because you are incapable of doing it or impossible because you do not want to do it?" Merlin asked, his voice defiant.

Hecate's eyes flared. "How dare you! I am Hecate, the goddess of magic and your mother, Merlin! I can do it! But you are asking me to betray the gods! If they even knew you were asking this of me…."

"Mother, please," Merlin pleaded, taking both her hands. "This is important! Not only are the lives of wizards, demigods, and mortals at stake, but even the gods themselves would be threatened if another wizard demigod were to be born! Think of that!"

Hecate sighed and the fire in her eyes died out. "I know, Merlin, I know." She closed her eyes for a moment and then when she opened, Merlin saw that they were filled with infinite sorrow. "I will do as you ask, but know this, my son, if the gods ever learn what we have done, we both will feel their wrath."

"I would gladly risk the wrath of the gods to save this world, Mother."

Hecate smiled sadly. "I know you would, Merlin. Your father was the same way and that is why I fell in love with him. I miss him." She stood there for a moment, remembering, but when she turned back to Merlin, her face wore an expression of complete seriousness. "One last warning, my son, I cannot promise you that what I am about to do will last for all time. Nothing like this has ever been attempted before. One day, a child of the gods may be born to a wizard. I cannot prevent entirely, but I may perhaps be able to delay it from happening."

"I understand, Mother."

"Do you?" Hecate looked intently at her son as if attempting to read his thoughts. "Do you, truly understand, Merlin? A day may come when another like you is born into this world and a day may come when it will be threatened by such a one. The damage done could be beyond reckoning and no one, not even me, may be able to stop them. This day may be unavoidable."

A moment of silence followed as Merlin took in what she had just told him. He sighed. "You are right. We may not be able to avoid it, but the least we can do is delay at as long as we possible can."

"Very well," Hecate said. "I doubt I will see you again before it is your time to meet Hades, so fare thee well, my son." Then in an instant, she was gone.

Merlin stared at the spot where she had just been. "Goodbye, Mother, and good luck." Then without another word, he turned and continued on his way, this thoughts no longer on the past but rather on the future he knew would one day come and that he was grateful he would never live to see.

Author's Note: If you read this, I only have one request of you: review! Please! Reviews keep more motivated. The more reviews I get the more likely I am to continue this.