A.N. Warning! AU ahead!

Third person POV

Deep inside the dimension known as Ghost Zone, was an unusual place. Giant gears and clocks were floating in a neverending mass of green and black. In the center of this place stood giant a clocktower. That was the lair of Clockwork, The Master of Time. The owner of the place currently stood in a massive room, on front of one of his viewing screens.

It was showing the image of a fifteen years old boy with jet-black hair and green eyes, fighting against a white skinned figure in dark robes. Of course, Clockwork knew who these two were. Especially the last one. Tom Marvollo Riddle, also known as Lord Voldemort. This person was guilty of many things. One of them the reason the Master of Time was going to have guests in three... Two... One.

"CLOCKWORK!" High voices resonated across the tower. Here it comes. Observants. Clockwork's biggest headache.

"I assume, you are here to discuss the matters of Thomas Riddle?" He asked, changing into his toddler form.

"YES! He has returned and you know that!" One of them shouted.

"No need to be so loud, I will handle this, as always."

"You are going to send your surrogate son, aren't you?" The second Observant asked.

"It shouldn't matter to you, I can't intervene directly. Now, please, care to observe the door?"

With that his guests went away. For once, they were right, Clockwork WAS going to send Daniel on a mission. Why not, he was completely capable for this. Young Phantom had faced beings considered gods in some cultures and emerged victorious.

Clockwork took the boy in when he was six years old. His parents were ghost hunters, very bright for that matter. But Ectology was a new science. And very dangerous. Ectoplasm itself was a hazardous material, which was why Jack and Madeline were wearing jumpsuits 24/7. And, as the Time Master saw many times, people never learn from their mistakes. The Fentons weren't exceptions. You would think the accident with the Ghost Portal prototype would teach them to take some precautions. It sent their college friend into the hospital for ten years! But no, they just needed to create another one. The Fentons built it in the basement of their own house. The new portal was bigger and more energy-consuming. Clockwork still remembered that day, when it was finished.

- Nine years ago -

"Kids! Get down to the basement, please!" Jack Fenton's loud voice rang through the entire FentonWorks building. He was a very tall man in his midyears with blue eyes and graying black hair, wearing a bright orange jumpsuit.

The basement of the Fentons' household was also a lab. Walls, floor and roof were covered in the lines of metal, shining with silvery light. Pieces of engineering were lying everywhere. And, of course, the pearl in this place was the Fenton Portal. Jack and Maddie had been working on this project for a long time. And now, it was finally done!

There was a sound of loud and fast footsteps on the stairs. Two kids came down. The first one was an eight years old girl with red hair and teal eyes. The second was a younger boy with black hair and icy blue eyes. They were Jasmine and Daniel Fenton.

"What is it, Dad?" Said the older sibling. Jack grinned.

"We wanted to show you our newest invention!" He answered.

"Is it that portal thingy?" Danny asked curiously.

"Of course, sweetie!" Confirmed Maddie, removing red googles from her eyes, "Jack, you can start"

"Yo-hoo!" The tall man shouted in excitement. He grabbed two wires from the floor.

"BANZAI!"

With that Jack plugged them. The insides of the portal were lightened by electrical sparks. Nothing happened after that, and the Fenton seniors walked away with dropped heads and sad looks. Then, the portal started making a whirring sound, and a green and black vortex appeared on the inside.

"It worked!" Both adults shouted in excitement and ran closer to their creation. That proved to be a mistake.

Last thing Danny remembered were blaring lights and loud alarms, mixed with his parents' shouts. He woke up very much in pain, every part of his body ached and he could barely move. Pieces of rubble were everything that surrounded young boy.

"Mommy? Daddy? Jazz?" He was shouting, fruitlessly trying to find his family members. Silence was his answer. Danny fell to the ground and started crying and sobbing. Suddenly, a blue circle, looking like a clock, appeared in the air.

From there floated a person in purple robes with a staff in his hands. The young boy was terrified by him. The man had blue skin, red eyes and FLOATED in the air. Danny was shaking in fear. The person just looked at him with a sad look.

"Worry not, child. I am not going to do anything bad to you," the now old man said.

"You are a ghost. Mommy and Daddy said they are evil," Danny responded, still shaking.

"I know what your parents told you, young one. But I can assure you, not every one of us is evil. Me, for example. Or you."

"W-what?!" The boy exclaimed, "I-I'm a g-ghost?!"

In response, Clockwork summoned a mirror and gave it to Danny. He was shocked by what he saw. The mirror was showing a boy with white and black hair. One of his eyes remained icy blue, while the other was glowing with deadly green light. Boy's skin became paler. It was too much for him to take in and Danny started sobbing again. The Time Master put a hand on the child's shoulder.

"Don't worry so much, Daniel, you are only half-ghost."

"Half-ghost?" Danny asked.

"Yes, and you will learn more about it later," Clockwork then added in sad tone, "I'm terribly sorry about your loss."

"Thank you," the boy said in a hoarse voice.

"If you want, you can come with me," At this Danny lifted his head and stared at the man.

"What?"

"You can go to my home, where I will teach you everything you need to know. What's your choice?"

Danny looked at the ground, deep in thought. This guy was a ghost, but... He was very nice. And he offered him a place to live. If Danny stayed here, he would go to an orphanage, and he watched enough movies to know that it was bad place. Not mentioning that he would be labeled a freak for his new appearance. Danny looked at the Time Master.

"Okay, mister..." The ghost chuckled.

"My name is Clockwork, Daniel. Follow me," with a twirl of his staff, Clockwork created another portal. Before the pair stepped inside, Danny asked.

"Wait, how do you know my name?"

"I know everything."

And with that, the Time Master and his new ward walked through the blue circle.

- Present Time -

As the time went, the two became closer. And on Danny's first deathday, the young boy called Clockwork 'daddy'. Even if he mumbled that in an half-asleep condition, it still warmed the Time Master's core as nothing else did.

And Clockwork was proud of his son. Despite his young age, starting from eleven, Danny had done many heroic deeds. He befreed Aragon's kingdom from the tyranny of the Dragon Prince, encouraging his sister to rebel against the ruler and fight against Aragon himself. Danny also returned Pandora's box to its' owner, when the Box Ghost stole it, trying to finally scare anyone. He was also helping out here and there, and there was hardly anyone in the Ghost Zone who hated this boy.

And there was a feat, which put his name in the legends. Pariah Dark had awoken from his sleep. The fool who opened his prison, another halfa named Vlad Plasmius, wanted to acquire power given by two artifacts: the Crown of fire and the Ring of Rage. Separated, they were nothing but accessories, but together they could make a mortal very powerful, and a powerful man - a god. But despite all the odds and hardships, young Phantom defeated the Ghost King and saved both worlds.

"Dad! I heard the Observants' shouts, is something wrong?" Clockwork heard his son say.

Danny was now fifteen years old. He was currently wearing a black and white T-shirt with his signature 'DP' in the middle, blue jeans and sneakers.

"Yes, Daniel, come over here, please," said the Time Master, gesturing for Danny to come closer.

"Who are they?" Asked young Phantom, looking at the screen. His father smiled slightly.

"Answer me, Daniel, do you believe in magic?" Danny blinked in surprise.

"Well, Desiree can do magic, so I guess I shouldn't be surprised," after that Clockwork summoned two chairs and the small family sat on them.

"Let me tell you a bit about the Wizarding World. Unlike ghosts, wizards and witches," Danny snickered at that, which was ignored by his father, "live alongside muggles, people without magical abilities. They just hide very well, since Medieval ages that is"

"And, as in every society, there are people who abused the power given to them. Dark wizards. The most famous of them is Tom Marvollo Riddle, also known as Lord Voldemort. People tend to avoid calling him by name. In the magical world, heritage means very much. So called 'Purebloods' are considered nobility, these are ones who have both wizarding parents, 'Halfbloods', who have only one, and 'Muggleborns', who were born in non magical family."

"It's the last of them that Voldemort wanted to destroy. The Wizarding world was thrown into a full fledged war, which ended fourteen years ago. You see, some wizards had the ability to see the future. Even if they see it like an Observant, only something that's going to happen with the current flow of time. And Voldemort got the 'prophecy', that he would be defeated by Harry Potter, who was an infant at that moment"

"Lily and James Potter, Harry's parents, went into hiding, but they were betrayed by Peter Pettigrew, a friend of theirs, and their hideout was found. During Halloween night, Riddle came to them. He killed the older Potters. But, when he tried to do the same thing to Harry, Avada Kedavra, the killing curse, backfired on Voldemort, leaving the infant with a lightning shaped scar. No one heard about the Dark Lord until now."

"A few months ago, after a special ritual, he returned. The reason Observants are so angry, is that Voldemort tried to cheat with Death."

"Why didn't he tell me anything?" Danny asked. They were kinda buddies with an ancient ghost. How much people do you know who can say 'I drank tea with Death last Sunday'?

"The topic didn't come up. Anyways, there are such things called Horcruxes. When person commits murder, cold blooded murder, their soul splits. Wizards discovered a way to put the pieces of soul into certain objects. These are horcruxes."

"So, I need to go there and destroy these things?"

"Not exactly, you are going to school," Danny beamed at his father. Since an 'accident' happened when he was six, Phantom never had a chance to go to school. He was educated by Clockwork and his old friend Ghostwriter. It was interesting, but lonely. Then a question came to the young halfa's mind.

"What school?" Clockwork smiled.

"Why, magical school, of course!"

"But that means..."

"You are a wizard, Danny"

"Wow. It's a lot to take in for one day." Nevertheless, the boy was excited. "Imagine, how..."

"Pranks can wait, Daniel," Clockwork said, interrupting Danny's thoughts and causing him to pout.

"Now for some details. You will need to catch up with material, since you are going to be in fifth year. Usually, Hogwarts doesn't have an 'exchange students', but the Headmaster is an old friend of mine. I'm sure he can do something, even if the Ministry is after him"

"Why?"

"The Ministry is the magical government. It isn't the brightest one, sadly. They don't want to accept the fact that Voldemort has returned. They think that Albus wants to become a minister himself, and call him crazy. Mr. Potter in the meantime is called a liar"

"Now for the other things. Your appearance seems human, but you will need to wear an eyepatch to cover your green eye."

"Is there any timeline where I can change my appearance?" Danny muttered.

"Yes, there are. You will go by the name 'Daniel Work' since it's my known last name between wizards. You will go buy supplies tomorrow. I can't go, sadly. My last visit was very long ago, I should be 'dead' by now. Take this," with that Clockwork gave his son a golden ring with a ruby on it. On the back side was written word 'Work'.

"This is a Works' lord ring. It will give you some privileges and reputation you might find useful."

"Wow. Thanks"

"No need to thank me. I believe you need to prepare for the trip, so good night"

"Good night, Dad!"

A.N. So here comes the first chapter of my crossover, what do you think?