Chapter 1. Reborn again

He was born, again. Like, reborn the 100536539th time. This time, he was born as Harry Potter.

He is an entity that remembers all past lives. He is reborn in a different universe each time he dies, each world with different laws.

Some worlds have good old physics, others have chakra, still others have the force, and some have mana, magic or aura. In some worlds, there are supernatural beings, like god. Some other worlds have mutant beings, like X-men.

Some worlds are in the medieval era. Some have prehistoric culture, and others have nations that span across the stars. There are very few worlds which exist in the modern era.

Sometimes, He was born as king. Other times as slaves or farmers. The only restriction was that he was born human

At first, he thought this as a gift. He learned everything, made everlasting empires, studied the laws of the world, even extended telomere so he did not age.

Then, somehow he died. And he is reborn.

Back to stage 1.

After repeating the process more than 10 thousand times, he/she had done everything possible to do. (Yes, he was sometimes born as a girl.) He was bored.

Everything he had done was irrelevant in another life. Only the knowledge was of some use, which he now had plenty of. He had no compulsion whatsoever to achieve anything. He had no goals.

He tried to do everything possible to end this never-ending life. He couldn't.

So he gave up, got bored, and lived lazily.

All that was left of his feelings were laziness and boredom.

The only reason he didn't suicide every time he got bored is because he had a probability to be reborn in a world where people are computer chipped, forcing everyone to labor. That was more frustrating than many other worlds.

Anyways, that's him, Harry Potter.

This world had magic. He noticed parents were magical, and there were some non-magical people too.

To figure out how this world was constructed, he nicked a book when his parents were sleeping. Easy.

And he looked up the fundamental principles of magic, as well as how to do light magic: Lumos.

Light magic is a simple spell that exists in almost all magical worlds. By looking at how to do such magic, he could find out how the magical matrix in the world functioned.

He got used to the laws, made himself some illusion magic, and continued to study the laws of this universe.

Learning the laws of the universe was a vital thing to do for Harry to maximize his inactivity.

Someday, when he was being lazy, a dark wizard named Voldemort came in and killed his father and mother. Some strange magic was put upon him when his mother died. He could get rid of it, but it wasn't harmful. Harry was just too lazy to investigate more about the ancient protecting magic.

Then, the dark wizard shot a killing curse at him.

Harry desperately wanted to live. In a modern world with magic, he could be lazier than some worlds with no supernatural forces. In a normal-physics world, he had to work even doing things trivial such as eating. In a magical environment, it could all be done with a snap of the finger.

So he did a space chirality rotation surrounding the killing curse using his magic. It was only possible to make such magic without understanding the principles of quantum, string theory, along with the understanding of soul and magical quanta. And some university-level linear algebra and the extended theory of relativity (to include magic).

Harry knew all that. So he did it.

The killing curse hit Voldemort.

Harry could sense the soul of Voldemort forced to leave his body.

Or, at least he was interpreting the waves of magic made by it to analyze its property and origin. One would normally need a supercomputer to interpret such waves, having multidimensional properties and radiation. Harry could do that.

Then, he sensed the soul splitting, as an unstable radioactive isotope's nucleus would.

One part of the soul was coming to him. He did not care.

Because the properties of this universe, a soul could only take control of one with weaker will.

Harry's mind was very strong. His mind was the only thing descended to him, life after life, wasn't it?

Souls interact with some higher dimensions of space. Death is a soul no longer being able to interact with our dimension of being, the rare objects that do interact with the far dimension is the resurrection stone and the veil. Souls only have self-consciousness while interacting with this world, so after death, the souls do not 'think' anymore. A portrait is a one-way passage that delivers some information of a dead, inactive soul to the portrait and redesigns a new sentient being on behalf the information.

Horcruxes are an anchor, forcefully pulling some part of the soul that exists in the far dimension to anchor to this dimension. They allow for the soul to stay in the dimension after they part from a body.

So Harry's mind or soul took up the soul fragment and decomposed it. He could learn a lot more information by the pathway, but mostly he didn't need it. The useful information was Voldemort's memories. Now he knew that there was a prophecy, Wormtail was the traitor, there is a secret chamber in Hogwarts, what the horcruxes were, etc, etc.

He also learned Parseltongue, because he thought it might be useful.

Then Harry re-programmed the anchor to be stationary to the higher dimension, not this dimension. By doing this, Tom Riddle's soul was pulled to the higher dimension, but it was already anchored to this dimension by 5 other horcruxes.

The anti-horcrux Harry made effectively canceled out one horcrux. Also, Voldemort felt his existence fade away a little.

After all work done, Harry got into a dilemma. Will he wait for someone to come, or will he just go somewhere on his own?

Before he could do anything else, Rubeus Hagrid came in.

Not long after, Sirius Black came in. They had a short debate about who will take the child, but eventually Hagrid took the child on Sirius's motorbike.

Harry was for a brief amount of time tended by Professor McGonagall and Dumbledore, but he was soon sent to the Dursleys. The look on Dumbledore was like you have to defeat him, but Harry really wanted to live lazily.

Harry was very satisfied with the choice. You see, muggles don't understand magic. So if he did some very difficult, new, or unknown magic, the muggles won't recognize it. He was free to do any magic he wanted.

Of course, there is the ministry of magic, so he enchanted his cupboard to absorb any wave emissions of magic performed inside it. It was a little bit of alchemy, transfiguration, and changing the magical properties in some unknown way to wizardkind.

Then, he undetectably extended some part of his cupboard and did some newly made Dursley-repellent charms in the area. Also, the extended part was disillusioned to everybody else.

Harry lived as lazily as he could in the next ten years. He just ate in the cupboard by duplicating what he'd already have and enjoyed the ignorance of his aunt and uncle. He did not go to muggle school. He was supposedly home-schooling. He knew all math and science, but was ignorant at history of this world.

He just used some magical beacon to connect to the ARPANET, gaining access to university research papers immediately. Why study?

Of course, when he was a little bit too bored, he sent some revolutionary 'suggestions' to the network anonymously, where this universe's scientists left out.