Disclaimer: Naruto is the work of mangaka Masashi Kishimoto, Harry Potter is the work of author J.K. Rowling. The author makes no claim to ownership of the aforementioned works and no profit from this fanfiction.

Uchiha Fukurou

Of Foundations, Betrayals and Bloodlines

Shimura Danzo looked over the files of two young genin. What he looked for was not something easily put into words. Their psychological profiles lay opened before him and he read and re-read the best guess analysis of his intelligence section. Danzo was known as the Darkness of shinobi and he held the belief that it was the darker side of shinobi life, the sacrifice and toil of those who would never be named that maintained the peace of the world. For the tree to stand the roots, buried in darkness, must be strong.

He was currently contemplating two new tools that his organization had been made aware of. In all possibility it was a trap, a set up to place spies within the midst of the AnBu but a spy that was known was a spy that could be used or even turned. He saw so many very promising things about these children. The Uchiha held the power to control Kyuubi and in the past their members had proven a threat to the village Danzo had sworn to protect. The clan as a whole was not to be trusted but they were simply too useful in so many ways.

The Kyuubi incident placed a new, more deadly emphasis on that threat. Their impudent, if experienced container was dead as was the Forth Hokage, a capable if idealistic ruler. All that Konoha had left was an infant vessel, an increasingly weary Sandaime, a generation quickly growing up ignorant of war's harsh reality and The Foundation. Orochimaru's research was one avenue that Danzo chose to pursue, it was dark work facilitated with bodies both live and dead obtained or discarded by The Foundation. The letter from Hanzo was another opportunity, one that could strengthen Konoha in the years to come if negotiations continued along a positive vein.

But the Uchiha clan was a knife held to the breast, a danger that was foolishly tolerated by the Sandaime. They needed to be defanged, destroyed if need be. The measures of the Nidaime were proving to be insufficient as the old died and the young simply forgot the sins of the past, with it, the true price of peace. So Shimura Danzo sat in his candle-lit office looking over the files of two young shinobi. He thought to himself that sometimes the best cure for a poison was a share of the poison itself. Then he smiled a little...

The Chunin Exam held in the Hidden Leaf that year was far from the bloodiest in recent history, that dubious honor went to Iwa and its Landmine Prairie Test, complete with explosive clay grenade toting prairie dog summons. It was, however; the most bitterly fought. Mentally and physically exhausted teams raced to Akagahara which proved to be a trap master's killing field. Teams that had used up too much chakra forged ahead to their peril, teams that waited to recover from their ordeal in the caves before proceeding, faced stiffer competition as the number of competing genin rose with time. In the end there were only three teams that passed, the fourth scroll was lost when genin teams from all five of the great nations decided to recreate the Third Shinobi War in fast forward.

Team Chun Chu, Itachi's genin team and a team from Hidden Mist were the only ones to pass. The death toll from the first to exams wasn't made public but a substantially smaller number of living genin would be leaving the exam than had entered it. The assembled teams learned from the jounin in charge, Akimichi Chouza, that the last phase of the Chunin Eaxam would be a tournament style competition held a month later. Fukurou and his fellow competitors were given a speech from the Third Hokage, a smirking Orochimaru behind him, about the exams being intended to promote peace through war-by-proxy. After being informed of their opponents for the first round, the teams were sent on their way.

Shigure returned home to be greeted by her father and older brother. "I'm in the final round." She stated. She got her poker face from her father, her brother however; favored her with a smile and a warm, "Well done!"

"It was announced that the final exam will be held in a month's time." Her father said, "We will use this time to improve your techniques and prepare, your sensei has already been informed of this." Her dad raised an eyebrow as he held up something for her to see, "She also left you a scroll when I last talked to her, apparently it has all the 'essentials' that you need."

Shigure smiled inwardly as she opened it up and checked the contents sealed on the paper inside. "Exploding spike traps, exploding pit traps, exploding wire traps, exploding poison traps, explo…."

With a twitch of a lip as the only sign of her excitement Shigure rolled the sealing scroll back up and said, "SQUEEEE!"

Aburame Kōki gave his twelve year old daughter a look, "…Squee?"

Ignoring her father's question and her brother's mirthful shudders of suppressed laughter, Shigure turned to go up the stairs, "I'll be ready to go in a minute father..."

"Squee?"

She turned and shot him a glare that women at times use on particularly stupid men, "In a MINUTE!"

Sunglasses slightly askew, Kōki licked his lips and nodded, "I-in a minute… yes… take your time."

Hiko was talking with one of his older cousins, Santa Yamanaka, "So this is what you need help with?" The man asked him, looking at a scroll, "This is quite ambitious of you. Inoichi-sama's grandmother created this technique. Are you sure you can pull this off? What are you using for the medium?"

Hiko tapped the hilt of his katana and Santa nodded, "That could work… but learning to bounce it around might take more than a month."

The younger ninja shrugged, "Sensei worked with me to the point where I have confidence in my skills. I won't lose to the others for a lack of ability. Even so, my teammates know my skills, unless I come up with something new, I'll definitely lose."

Santa frowned in thought, "Yeah… You have that Uchiha on your team right? Uchiha Fukurou? A technique like this would probably work well against a doujutsu user. I guess you do need the edge, and working on this might help me too."

Hiko shrugged, "It's not just Fukurou, Shigure-san isn't a pushover either. But I guess you're right, maybe this'll take him and Itachi by surprise."

Santa smiled in anticipation, "Well let's get started! You've come a long way squirt."

"Don't call me squirt!"

"Squirt!"

In a hidden location under a certain shrine, Uchiha Shisui presented a familiar looking scroll to the Elders and his Clan's leader. Fugaku looked it over, "Amazing…" was all he could say.

"You managed to retrieve an Uzushio Technique scroll, an original too…" One of the Elders commented, "This is quite a find Shisui, does Danzo suspect that the scroll in his possession is not the original?"

Shisui smirked, "Danzo had everyone from the mist hunter-nin to our own AnBu convinced that the defector was the primary object of the mission. His own pets shadowed the mission and they never let their eyes off of me… Which made things easier for me, as far a Danzo believes, the original was destroyed and the one he has in his possession is the sole copy found by the defector. The sensor he set up to watch me will confirm it."

An elder near the back told them, "These techniques are the basis of the sealing techniques used on all Konoha Jinchuriki. He must be trying for a play at the container. He probably intends to eventually have a copy made and presented to the Sandaime… a copy of a copy! Fu fu fu!" Dark laughter filled the room.

"Shisui…" Fugaku said, "Itachi and Fukurou made it into the final round as we expected. I've arranged for you to begin training Itachi in preparation for the exam, Fukurou will be handled by another" Shisui acquiesced without comment as shadows flickered across his face.

"That will be you, Mikoto…" said Elder Michiru.

Fugaku's wife, who had been quietly sitting behind him in the flickering candlelight blinked in shock, "Me?"

Fugaku seemed a little displeased but held his silence.

"You men folk have been letting this child run circles around you for more than two years now!" The Elder panned her eyes over the sheepish looking men in the room, few met her sharingan eyes. "Perhaps this situation requires a woman's touch. You can lead a horse to water but you can't make it drink. Forcing Fukurou-kun will only alienate him and he's already proven adept at avoiding your attempts to draw him into the fold Fugaku. But all boys yearn for their mother, Mikoto! You are a jounin-level kunoichi of the Uchiha Clan! Train him for the exam and use this opportunity to form closer ties between Fukurou and his clan… as it should be!"

"Of course I will do as you say but what about Sasuke?" Mikoto worried, he still too young to be left unattended.

"Hmph! This too requires a woman's touch! Fugaku, for the next month I'll be staying at your home and taking care of Sasuke-chan while your wife is away." Michiru announced imperiously.

Mikoto sighed, "Thank you mother."

Fugaku nodded with a stiff expression while his father shot him a commiserating look from across the hall. The clan leader seemed even more displeased at the prospect of having his mother-in-law over for the next month. What if she decided to stay? Somehow he forced out a polite, "P-please take care of us…"

"I see," Another Elder stated turning to Shisui, "If that boy is a true inheritor of our bloodline, inevitably he will face Itachi in the finals. Not only will their battle prove the strength of our clan once again to the assembled powers but a loss will bind Fukurou to us as securely as winning under Mikoto's tutelage. A rival to be surpassed will only serve to excite our blood…"

In the two years since becoming a genin Fukurou had come up with a theory regarding the differences between magic and chakra. Fukurou know believed that what he had known as magic was really a form of Onmyōton or the Yin-Yang release. The mental magics, animagi transformation, charms, transfiguration and divination all fell into this realm of chakra techniques. As natural users of such techniques among ninja were rare to find, this theory explained why the proportion of wizards in Harry's world were smaller when compared to Fukurou's.

Inton or Yin-release was the manipulation of one's spiritual energy to give form to one's dreams and imagination. As a wizard this had been the mental and emotional requirements that drove a spell, like the happy memories of a patronus, the visualization needed to change a match into a needle or the deliberation required for apparition. Techniques that required Inton as a component resulted in mental strain and fatigue which accounted for the way a wizard grew tired after casting one too many spells but did not, necessarily die as a ninja might. In the case of Inton, someone who overused the ability was more likely to fall into a coma that was the common side effect of magical exhaustion that Harry was familiar with.

Yōton or Yang-release was the manipulation of one's physical energy to breathe life into form. Fukurou recognized this as the other half of most transfigurations and transformations that changed one object into another or a person into an animal. Tonk's and Teddy's metamorphamagus abilities most likely stemmed from this ability. It was what gave impetus to the transfiguration of match into needle, the vitality that caused wizards to age more slowly than their muggle counterparts, the determination that fueled movement through space and time during apparition. Harry had never had cause to use them but he had known of spells and rituals that drew upon life force to charge themselves or to spark the physical transformations that wizards like Voldemort had gone through in an effort to enhance their selves.

Thus, Onmyōton, the combined use of Inton and Yōton was what Harry had called magic. And Fukurou had inherited it, at least in part. The spiritual energies of Harry Potter now belonged to Uchiha Fukurou, whose heritage already gave him powerful spiritual energies. This boost was what gave his sharingan their peculiar ability to easily breach a person's mental barriers and sympathize with the inner thoughts of others with but a glance into their eyes.

But to properly wield the eyes of an Uchiha one needed the body of one as well. Physical exercise the likes of which Old Harry had only seen as an Auror Trainee became the norm as a member of Team Chun Chu and it seemed that his body was altering itself to accommodate the Yin chakra within it by adapting and trying to develop a matching amount of Yang chakra. Fukurou was finding himself growing much, much stronger for the exercises that he underwent and his chakra more potent. The amount of Yin chakra that his body possessed was also having another effect, this time on his chakra nature affinity.

Fukurou was training in one of the grounds that his that Uncle Teyaki had arranged to be set aside for his use for the upcoming Chunin Exam. He held a steel tipped arrow to his lips and breathed on it. The metal turned a dull cherry red and the wood began to smoke slightly even with the fire resistance seals on it. Quickly nocking the arrow, Fukurou sent the projectile sailing down range to a set of targets set up a measly hundred meters away in the middle of a small pond. The second his arrow impacted the log, the whole thing went up in flames with an audible, -FRUMP!- as the wood shattered into pieces from the explosive force of having the water that saturated it, instantly evaporated by the power flowing from his arrow's fire chakra inundated tip.

Carefully, Fukurou nocked another arrow that he had breathed on. In this case the arrow tip glowed pale green and in the sight of his sharingan there were several rotating blades that twisted about the arrowhead in a conical helix. This arrow made a sound akin to a buzz saw when it hit the target post. Rather than explode, the arrow chewed through the wood and came out the other side, flying downrange through another tree and a rock before burying itself in the earth.

Fukurou nocked a third arrow, this one he held a moment, concentrating carefully on sending his chakra in a cycle that coiled through the arrow, tighter and tighter. The bands of chakra wound tighter, rubbing against each other and building a charge that gathered at opposite ends until a violet glow enveloped the entire arrow. Letting it fly, the arrow seemed to slip through the target post as if it didn't hit it at all. It continued on unimpeded by the trees and rocks it collided with until it buried itself three meters into the earthen embankment that was the reason for Fukurou being at this particular training ground.

While one's nature affinity didn't bar a ninja from learning multiple types of nature transformation it did however make it easier for a ninja to utilize the element he or she held an affinity for. One example of this is the Grand Fireball technique. While a common Konoha ninja skill, most users without a fire affinity only manage basketball sized fireballs or at best, wide gouts of flame capable of engulfing a man's entire torso. Compared to that, the Uchiha Clan fielded so many ninja with a fire affinity that one wasn't considered an adult until one could spit out a cottage-sized fireball.

Most chunin possessed at least one nature affinity that allowed them to give their chakra the properties and nature of a certain element. Most jounin possessed two and in some cases, with time and hard work even developed three. Fukurou unique nature allowed him three affinities at an age most ninja would have been fortunate to develop one. And now he was running through all the battles he had witnessed during the first two rounds of the Chunin Exam, particularly the fights of Suna and Kumo genin. He tried recalling the jutsu used and began to replicate them from memory.

The next few hours were spent slinging around a selection of lightning and wind attacks. At times he tried combining the wind attacks with his fire style jutsu. The results were often spectacular. It was this sight that Uchiha Mikoto happened across when she came looking for Fukurou. Thought neither knew it, their meeting was to change the fate of their clan and village.

AN: Chunin Exam Finals next up, some training, some fights and a battle of bloodlines. Enter, Yuki Clan of the Village Hidden in the Mist.