Warning: No Beta for this story yet and I am not from an English-speaking country, so feel free to correct any mistakes you may notice.

I do not own Harry Potter or Yu Yu Hakusho

Prologue

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The first thing Harry noticed was that everything around him seemed so big, and how weak and small his body felt. He then noticed how dark and dusty the room was. He knew this wasn't Privet Drive, and yet felt no surprise. In this way so specific to dreams, his mind and body felt like his own and yet he was merely a spectator. He remembered it, he had seen this very room not too long ago, down to the roaring fire. When was it? When had he seen this place?

He opened his mouth, and his voice was almost inaudible in the thickness of the dusty air.

"Wormtail..."

He heard a shuffle, and a man he knew was actually short in stature entered his field of vision and seemed to tower over him before he knelt in front of his seat.

"Master? "

The rat's voice was weak, hesitant and frightened, and disgust washed over Harry. Was such a coward one of the only two men he could count on in such times? This sparked indignation and rage, and Harry would have tortured the man here and then if he could have afforded to waste his energy like that. His storming anger aside, his voice was only calmly menacing when he spoke.

"He hasn't returned. Have you received a word from him? "

"N-no... He should come back tonight b-but... I di-didn't hear anything from him..."

Night had fallen. His second and currently most useful follower would soon be back with the necessities. Harry had to contain his trepidation.

As if to answer his thinly veiled impatience, a tingle on his senses, like a caress to his magic, warned him that someone had gotten through the wards he had created. They were weak wards, and couldn't do much more than work as an alarm and ward off any filthy muggles that may want to enter the house. His body could not handle the use of strong magic yet. But this would be corrected by the end of the school year at Hogwarts.

A knock was heard on the door, and Harry uttered a spell to unlock it and allow the man to enter. His follower knelt in front of him and presented him a wooden box, on which papers with ink writings were stuck. Harry recognised the symbols of a time-freezing barrier. However the seals were broken, and the man opened the box for him. In it was a single and very long silver hair that seemed to shine with what little light of the moon entered the room. It looked very much like a unicorn hair, yet Harry knew that this hair did not come from a unicorn, but from a much more powerful and dark creature, a creature feared and thought long extinct. A demon.

"Master..."

"Is it still usable?"

"It is. The freezing barrier kept it perfectly intact, and the demon's residual energy still surrounds it. I only opened it today to verify that we would be able to use it."

"Was there any other hair that we could have used? "

"N-no master... I found nothing else in the hiding place I found this hair in... I-I was also unable to find from what type of demon this hair came from, as all the scrolls left were almost completely destroyed by time and water..."

"I see. The demon may be able to procure us some more. We shall summon it tonight."

"Master? "

"The summoning ritual is ready. We will test it tonight, as I am feeling better. Wormtail..."

The rat looked up, without actually daring to look at him in the eyes. Who said rats were stupid? They were merely cowardly and pathetic, and those were qualities Harry could appreciate in a subordinate, as without them control became tenuous and a work of every instant that required to always be watchful in order to detect betrayal. It wouldn't do for Peter to realise that he had some intelligence, he was more useful kept in his current state.

"Bring me to the basement."

Wormtail stumbled as he got up, and took Harry through the once abandoned muggle house, the same one where everything would return to the state it never should have left.

They entered another room in which the floor was made of stone tiling. A few old and forgotten muggle machines were lined up against the walls. Wormtail used his free arm to light a few blue fires in each corner. A large square painted in black ink could be seen on the floor. Four wooden pillars were at each angle, with fluttering and sparkling inked papers stuck on them. The barrier would protect the summoner until the first half of the ritual was finished, and the future master was ready to tie the demon's soul to his own, chaining it and subordinating it to his will. Enchanted metal chains laid on the floor, waiting for their prey.

Wormtail sat him on a comfortable armchair near the edge of the square and knelt by his side. Harry gave his more competent follower the order to begin the summoning, and the man went to put the silver hair in the centre of the square before leaving it. The follower turned summoner then began a complex spell in the goblins' language, and the strange chant filled the room.

A white mist seemed to escape from the now shining hair. It filled the square from the floor to the ceiling, seemingly unable to leave it, the barrier creating a prison. Despite that, an overwhelming pressure that could only come from an incredibly strong power had begun to fill the room. Cracking sounds could be heard, and black lightning hit the limit of the barrier, straining to break free. A shout from a young voice, a voice neither clearly male or female, was heard. It cried in agony before it morphed to a masculine and more mature one. Soon they only heard a harsh intake of breath followed by panting. His follower took off the seals on the pillars and the mist, now free, began to dissipate, revealing a body crumbled and tied up at the centre of the room.

Harry suddenly felt a great delight when he took in the appearance of the creature he had summoned as a new and powerful force for his future army. The creature was beautiful. He could clearly see the advantages he would gain from having by his side a being that looked so much like a creature of the light. It would without a doubt make taking over wizarding Britain much easier. This being would not only bring fear to the hearts of his enemies, it would inspire confusion in the side of the light, as well as force awe and admiration.

The creature was male, its shoulders being too broad for it to be female. It was tied harshly to the floor in an uncomfortable position, its face not visible as it was turned in order not to have it crushed nose-first against the stone tiles. It was tall, almost seven feet, and completely dressed in a white flowing clothing. Long sumptuous silver hair spread all around it in a halo, and despite what little light there was, it reflected the blue light of the fire almost like water would. The long hair could not completely hide the two white canine ears perched on top of the creature's head. A tail covered in long silky silvery-white fur was caught in the chain in a way that must have been painful. Clawed hands had left deep scratches on the floor, showing that the creature had tried to resist.

The only sounds left in the room were now an irregular breathing accentuated by soft threatening growls.

Harry lifted a hand, and the chains on the floor became a bit longer. Immediately the creature tried to stand, but it was only able to kneel partially before the chains became rigid, making it impossible to move, and forcing a gasp of pain to escape from its still invisible mouth. Silver hair then flew around as a pale and finely sculpted face snapped up in rage, and feral dark golden eyes glared at him with outrage and bloodlust.

Harry wasn't intimidated. The creature was currently unable to do or even try anything.

The glare sent his way also demanded an explanation, and he found amusement in the fact that even in such a vulnerable position the creature refused to let go of its pride.

"Wormtail, bring me closer."

The short man immediately came toward him, dark gold eyes following his movements warily. Harry was once again lifted and then brought into the square, held slightly higher than the creature's eyes yet still able to reach and touch it when he would need to. Pale lips opened as the creature spoke for the first time, and a short sentence was spat at him in a language that sounded eastern. The tone suggested that it was a demand mixed with an insult.

Whereas Harry's voice was a wheezing whisper, almost inaudible, the white being's voice was deep and rich, almost seductive in a way, yet suggesting danger, like how some people perhaps imagined Death's voice to be.

It was captivating, and Harry could feel the shiver of fear that went through Wormtail at the sound.

"Do you speak our language?"

After a moment of silence, a growled answer was heard.

"What are you brat? "

Harry had the strangest feeling that the creature wasn't one to bluntly insult anyone unless deeply angered or worried. Everything about it seemed too dignified and commanding to sink to such a level. The use of the word "brat" could not anger Harry, for it was an expression of weakness, and rather than feeling anger, he felt a sort of unexpected mirth. It must have shown on his face – and truthfully it had been the intent – because the white being snarled.

"I am the wizard that is to be your master, and I was just about to finish the ritual that will bond your demonic soul to mine."

The creature's eyes widened. Harry lifted his hand and brought it to rest on silky silver hair.

A hoarse cry escaped the being. Harry's mouth stretched into a pleased smile, and this despite the fact that he was starting to feel a far-away pain himself, one that truly felt like his own. It kept getting stronger, even as he took his hand away. Just as he started to feel pulled away from the body he occupied, he saw the pale and panting man look at him in the eyes with a knowing smirk on his face. His dark voice suddenly seemed overlapped by a younger one.

"Good try, wizard. But I am no one's slave."

Harry suddenly felt torn away from his body, no, not his, someone else's, someone he had begun to know very well, and slammed back into his own as he woke up with a splitting headache.

His own gasp of pain as he woke up filled the bedroom and the dream seemed to leak out of him and invade his reality, making the familiar and welcoming place look sinister.

Harry kept his hands on his head, fearing it might split in two should he not hold it together. The headache was agonizing, to the point of making thinking near impossible. He could not remember everything clearly, already the dream was slipping away, but silver canine ears and golden eyes were like burned on his retina, and blinking could not make them go away.

The boy got up from his bed with a groan of pain while trying not to wake up Ron, Fred, and George. He tried to embrace the memory of the nightmare, in hope that it would not dissolve into the air like mist, as the last one did. He reached for his glasses, a quill, ink and a piece of parchment, and started to write. When he had finished describing everything in detail, he took another roll of parchment and wrote a short letter, feeling too drained to make it long or reassuring. His eyes searched around for white feathers before he realized that Hedwig hadn't come back yet.

This was urgent, Harry knew it deep down. This was no normal dream, and it was already the second one. Someone needed to be told about this dream or whatever it was, and if Sirius was so far away, then he would not be of much help. One solution left...

He shook Ron hard. His best friend groaned and turned around, almost punching Harry in the face and breaking his glasses in the process.

"Mwha izit... Tooearly... 'tilnight..."

"C'mon Ron wake up!" Whispered Harry harshly in the redhead's ear.

Blue eyes blinked up sleepily at him.

"...rry?"

"Yes. I need to borrow Pig."

"... The bloody hell for...?" Mumbled Ron while he was slowly getting up. Or more precisely stumbling up.

"A letter to Dumbledore. Then we can get back to sleep, I promise."

"Blimey... Couldn't have waited could it?"

Said Ron, but one look in Harry's direction told him how serious this was and he nodded.

"Come on, I left him downstairs, can you imagine the four of us in the same room plus Pig? Wouldn't have ended well I bet... We wouldn't have gotten any sleep with the noise the little bugger can make. But then I'm not getting any tonight anyway..."

Grumbled the boy a bit over-dramatically. One letter sent later, the two teenagers crawled right back in bed and slept away. And although Harry had no guarantee the headmaster would even take him seriously, he felt a bit calmer and had no more nightmares that night.

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Important AN: I cannot guarantee regular updates, as I am in the last semester of my last year in University, and that means I have a lot of work. One thing I can promise is that I will not give this story up, I will finish it, even if it takes me years to do so. I always disliked unfinished stories that leave you craving for more, even though you know that it won't ever be updated again, so I swore to myself that I would never do that. If I do, then something terrible must have happened to me, you're warned ;) .

Also, a repeat of the warnings from the beginning: I don't have a beta-reader, and this is my first story in English, so feel free to point out any mistakes I will make (yes, will, there will be some, it can't be avoided), especially if they are plot-related. I won't take offence, far from it ^^ .

There, that's all! Please Review!