Memories of the Mangekyo
Chapter Three:
Hogwarts
Utilizing 'Kamui' enabled me to arrive at King's Cross well before Eleven. I had learned in Diagon Alley that my eyes perceived Magic in a manner similar to that of Chakra, so My intention was to view the station through the lenses of the Sharingan and thereby locate a concentration of Magic, considering the reclusive and strange ways of wizards it would be unlikely to locate it unless you knew where it was. Or like me, had a Doujutsu capable of perceiving energy flow.
After perceiving the location of the barrier all that was left was to determine the method of entry, after observing for a short period of time I had discerned that you simply walked through it as though it did not exist. Having entered the platform the first thing my eyes beheld was red. Red, the color of freshly spilt blood, if not for the fact that I had trained my mind I would likely have had a flashback to the night of the massacre, it helps that my memories as Sasuke are, slightly removed, from my life as Harry.
After boarding the train and locating an empty compartment I opened my Potions book, activated my Sharingan and began reading. After completing the memorization of my textbook I closed my eyes and began to sort the information, ensuring I could call it up at will. What few knew back when I was Sasuke was that the Uchiha clan had to go through complex mental exercises in preparation for the awakening of the Sharingan, these mental exercises were matched in complexity scale and effectiveness only by the Yamanaka clans mental exercises. These were what enabled the Uchiha to utilize their copied techniques and free form genjutsu with peak efficiency, truthfully, Sasuke believed that Hatake Kakashi had likely trained long and hard to utilize the techniques he copied from others, otherwise they would not have been nearly as effective, either that, or he was just a true genius. Sasuke was not a genius, on the other hand, Harry was.
Although a part of his strength came from the memories of Sasuke, had he relied entirely upon those he would never have advanced, at the moment he was far stronger than all three Sannin together, in terms of Chakra, Control, Speed, Reflexes, Ninjutsu, and Genjutsu, Taijutsu was less, but even so, Harry's unique style developed with the fact that he was smaller than most largely made up for it. Add in a Blade and Harry could beat most shinobi Sasuke had ever met, except perhaps Madara and Pein, they could nullify most of his advantages after all. And ultimately, Harry had little but theory for anything Sasuke was incapable of.
Harry had placed a potent Genjutsu about his compartment to ensure that eyes would not notice it, and that no one would consider entering it. This meant that his train ride was rather uneventful.
Upon arrival Harry heard the call of "First years this way" and followed, stepping onto the boat, due to his reading Harry knew that his skills as a shinobi were unheard of, thus he had decided to hide any overt skills, like walking on water, around third year he could loosen up a bit as they began learning things he could use to simulate his shinobi skills.
When it came time to for his sorting he went and placed on that hat. "Hmmmm, a Good mind, cunning too, loyal too those who earn it, hard to get too you, not at all a Gryffindor, you would slaughter most Slytherins, you're not open enough for Hufflepuff, very well, it had better be, RAVENCLAW" the hat shouted the last word to the whole hall, I was quite pleased, this would enable me to accelerate my wizarding training quite a bit as Ravenclaw's were acknowledged bookworms, lovely.