Moon Slayer: Chapter 1: The Letter.

Hello, my young friends(Or elder, if you're older than me, which is highly likely, as I'm still in Highschool.), Dark here with the beginning of another Possible Parallel Universe, as the Multiverse theory states. Enjoy.

P.S. This fic is also me experimenting with Yaoi. If you don't like it, DON'T READ IT!

P.P.S. The explanations are a bit long, sorry about that, but I just imagine the Soul King as someone that describes things to the finest points.

P.P.P.S. Just a couple of notes.

1. This happens just after the Soul Society Invasion, and Aizen's Betrayal

Begin!

Tensa Zangetsu sighed as he relaxed in the Inner World of his wielder. He was lying on the side of a building, recalling how he got here.

'Not like there's anything else to do here.'

(Flashback)

Harry Potter groaned as he opened his eyes.

He turned his head as he heard a voice.

"Hello Harry Potter. It is good to meet you." Said the voice. Harry gaped as he saw the source of the voice.

The Entity in front of him appeared to be humanoid in physique, with slicked-back dark hair, oval eyes with black sclera and unusual pupils and very thin eyebrows. It does not have any arms or legs.The Entity exists within an unusual barrier that is framed on either side by bright white curtains as the focus point of a large, elegant room.

"W-who are you?" The Child managed to stutter out after a long time.

"I have many names. I am referred to as, 'God', as 'The Almighty', as 'Kami-sama'. But I have one name that I was birthed with, and that is Soul King, or Reio-sama. You may refer to me as any of those names." The Soul King stated.

Harry's eyes were wide, and his jaw was agape. THIS is God, or the Soul King as he said?

"Why am I here, Mister Soul King?" He asked.

The Linchpin of the Soul Society smiled at the child as he answered.

"Harry, you are here because you died. But you died before your time. You were fated to die of natural causes, in the year 2120, at the age of 140. Instead you died at the age of 14, dying by the hands of your Nemesis, all because your discovered the manipulations of your former friends. Harry Potter, it has been decided by myself and the Zero Squad of the Soul Society, residing in the Realm of the King, that you are to be Reincarnated as the Zanpakutou of Ichigo Kurosaki, entitled Tensa Zangetsu, or Zangetsu when in Shikai."

The Information stated by the Soul King baffled Harry, He wasn't supposed to die in the graveyard? Zanpakutou?

"What is a Zanpakutou? And is the Wizarding World aware of how I died? Is Cedric alright?"

The Soul King looked a bit confused, before recalling that Harry would have no idea what a Zanpakutou is, and of course he'd be curious about his friend.

"Your friend, Cedric Diggory, is alive. He informed the Wizarding World of the death, and the return of Tom Riddle, or as he refers to himself as, Voldemort. The 'Minister of Magic', Cornelius Fudge, is in denial, and insists all is well. Foolish Human. As for what a Zanpakutou is, A Zanpakutou is the main weapon of the Shinigami, the Arrancar, and the Visored. The Zanpakutou of low-ranking Shinigami are called Asauchi and do not have names, but the Zanpakutou of Shinigami of rank have names. In its sealed state, a Zanpakutou has the form of a Japanese sword. Such weapons are unique swords generated from their owner's souls. Its shape differs depending on its owner.

Depending upon the Shinigami's ability to communicate with and control their Zanpakutou's spirit, a Zanpakutou can manifest itself in two additional forms and revert to a sealed state. These two forms, known as Shikai and Bankai, are akin to upgrades for the Zanpakutou, giving it abilities far beyond those of its simple use as a sword. Shinigami usually carry their Zanpakutou in its sealed state, and activate the released forms as necessary.

A Zanpakutou can change size and shape depending on the spiritual strength of the owner.

All Zanpakutou have two levels of release. The first one is Shikai and the second one is Bankai. The power and forms of Shikai and Bankai are dependent on the Zanpakutou, and vary according to the wielder's strength and training.

Most Zanpakutou look like regular katana, with slight variations between them as one would expect between different swords.

Zanpakutou can also be disguised as other objects, though such objects seem to need to be of similar proportions to the sword itself.

Shikai is the second form available to a Zanpakutou. To activate it, the Shinigami needs to learn the name of their Zanpakutou. This is not as easy as simply picking a name, for the living spirit of the Zanpakutou already has its own name. The Shinigami must be able to communicate and harmonize with their Zanpakutou effectively, which requires being able to speak to the spirit within its world.

The blade changes shape and gains special abilities by chanting a Kaigo, or release incantation. Using the Kaigo, followed by the name of the Zanpakutou, activates Shikai. It is crucial to memorize each phrase, for every Zanpakutou has a different incantation.

The commands vary between users and range from a simple imperative verb to a short poem. They often relate to the Zanpakutou's signature ability or hint at the nature of its spirit. This step may be bypassed by expert Shinigami who have learned how to use their Bankai.

Achievement of the Shikai is a mark of control of a Zanpakutou, and it is a requirement for advancement within the Shinigami ranks, for most seated officers are capable of Shikai. It is required in order to achieve the rank of lieutenant, for it is a requirement which most captains look for.

Bankai is the second and final upgraded form of a Zanpakutou. To achieve Bankai, one must be able to materialize and subjugate their Zanpakutou spirit. Materialization means the opposite of getting dragged into the Zanpakutou's inner world: the wielder needs to summon the Zanpakutou's spirit into the physical world. It usually takes 10 years or more to achieve, plus the experience needed to master it. Despite the Zanpakutou spirit being subjugated for their Shinigami to learn Bankai, the Zanpakutou also becomes stronger and learns Bankai at precisely the moment their Shinigami learns it. Even though Bankai is the final stage of a Zanpakutou, it does not mean the Shinigami's growth ends there. A Bankai, especially one recently obtained, can evolve even further as its Shinigami gets stronger.

The power and forms of Shikai and Bankai are dependent on the Zanpakutou, and vary according to the wielder's strength and training. But in general, one's power can grow 5 to 10 times greater by attaining it. Only the strongest Shinigami can use it, and it is the ultimate technique of a Zanpakutou. Those who achieve Bankai always have remarkable roles in the history of Soul Society.

Zanpakutou are the trademark weapons of the Shinigami. Capable of cutting spiritual bodies, they are among the few weapons which can be used to combat Hollows. Each Shinigami carries a Zanpakutou, and each Zanpakutou is unique: the swords are reflections of a Shinigami's power and soul, and sentient beings unto themselves. The Zanpakutou's name is the name of the living spirit which empowers the sword and lends its strength to the Shinigami who wields it. These beings can vary greatly in appearance, and have their own distinct personalities, which match their owner's.

A Zanpakutou's shape and abilities are based on their Shinigami's soul. Once a Shinigami learns his/her sword's name, they can communicate with one another and grow stronger together. Zanpakutou are born with their Shinigami, and they die along with their Shinigami. Shinigami use them in battle as a reflection of their heart. When released, they can display a vibrant power. They are one with the Shinigami, and they share a Shinigami's conviction.

Inside each Zanpakutou is an incarnation which manifests itself upon the Zanpakutou's transformation. The Zanpakutou you will be reincarnated as is Tensa Zangetsu."

Harry's eyes were wide at the lengthy and detailed explanation, and he was going to become a Zanpakutou?

He then felt himself changing, it made himself ache a little, but it wasn't that bad.

When it stopped, a mirror formed next to The Soul King. What Harry saw shocked him.

Before him was a tall , and lean-built, teenage male. He had pale skin, high cheekbones, blue eyes, and long ragged black hair with brown highlights, his attire consists of black pants, low-heeled boots, and a long, amorphous black robe with a burgundy highlight that flares out into ragged ends, with white lining and a hood. In his hand was a sword that resembles an oversized khyber knife. It has no tsuba and no proper hilt; what Harry holds is the cloth-wrapped tang. The sword is as long as Harry is tall, and has a black blade with a silver edge.

Then, the Mirror disappeared, and in its place, a iron door appeared, it bared a hourglass symbol on it, and where the keyhole would be, was a hole that appeared to be able to fit Zangetsu into it.

"Tensa Zangetsu. This door will send you into Ichigo Kurosaki's Inner world, on the date of his birth, 15 years ago. To open it, you must force the door open with your blade. Now, Abandon your fear. Look Forward. Move forward and never stop. If you pull back, you will age. If you hesitate, you will die. Now move forward, and BECOME THE STRONGEST!" At this, Tensa ran forward, and stabbed his blade into the hole in the door, and broke it open, and in a flash of light, he was in a sideways city, standing alone, with a white orb taking the form of a bleached white baby, in a Shihakusho with the colours reversed, and black and yellow eyes, with a large katana next to him.

(Flashback End)

Tensa's musing was interrupted by pure white arms wrapping themselves around him.

"Hey, what's gotcha thinkin' so hard, Tensa-kun?" Asked Shirosaki, and he placed his head in the crook of Tensa's shoulders.

"Just thinking of how I came to exist in this realm." The sword spirit replied.

Shirosaki frowned at the memory, recalling how Tensa told him of his past, and how he died.

He was about to comment, when the duo noticed large clouds in the sky, covering the sun. In an Inner world, this almost always signified confusion.

The two got up and walked into one of the buildings through a window, and looked into a television that was in the building, connected to Ichigo's Vision. What the two saw shocked them to the core.

Ichigo was currently holding an envelope with familiar handwriting on it, the writing said:

'Mr Ichigo Kurosaki,

Second Floor Bedroom on the left,

Kurosaki Clinic,

Karakura Town,

Japan'

"NO!" Tensa shouted in shock. 'This can't be happening!'

(Chapter End)

Hey guys, did you enjoy the beginning of a new story, a new possibility? Please read, fave, follow, and review, this is Dark, signing off.