Reigakure
Naruto was a small and blonde baby who had the unfortunate fate to house a beast of mass destruction. The beast is known as the Kyuubi no Kitsune and sealed into Naruto by his father and mother by using the Reaper Death Seal. As the name implies the Grim Reaper his self appeared and sealed the demon into the child in cost for the father's life and the mother died from blood loss, but there was a factor missed a human, let alone a child, was never even to be in a hundred foot radius of death energy and the Reaper's energy left an imprint in the child's DNA.
The Reaper a being knowledge and boredom knew he left the imprint and wanted to see how things played out and with a grim smiled he left in a swirl of white figures and the tortured screams of the damned. From the DNA imprint the child's hair flickered between blonde and silver, the hair then lengthened to his waist. Then he grew small unnoticeable, but there, bumps on his forehead. Finally his skin paled to corpse level, all of both his eyes turned white with a tinge a grey, and he grew sharp teeth, and his nails also grew sharp.
He was brought before the council of Konohagakure, a village of prestige. They immediately called for his execution saying such a thing need to be killed before he kills them. The Sandaime, the recalled leader, rebuffed all of the requests saying a brusque no. Instead they settled on having Tsunade perform a physical Genjustu over the child and Jariaya put a stabilize seal before they left the village. With the child back in his 'original form ' the council backed down a little before they left plotting on how they would rid themselves of the obvious devil child for good.
Barely five years later Naruto's DNA kicked in and his eyes turned grey and he saw passing spirits and noticed the seal over him. He gave a mighty frown before stole ink removal and used it on himself. The illusion over him as his true form showed. He looked in a mirror as his skin turned ANBU initiates mask white, as two inch long horn appeared on his forehead, as his hair grew out to his calves, and when his teeth and nails sharpened in anger. Around him burst ghostly white chakra along with his blue chakra accompanied by a sinister red chakra.
The burst didn't last long and he wasn't close enough for anyone to feel it but a something felt and gave a feral smile and snapped his fingers. Hearing a thump, Naruto whirled around claws bared instinctually but paused when all he saw was a leather-bound book. Opening it, the child saw that it said Reishigan and looked on interested. The book stated that the first stage let the user see spirits and use spirit/soul chakra. It then went on explaining that the only way to get an increase in spirit chakra was to send corrupt souls, the more corrupt the more energy, the Reaper and the way you go to the second stage is to be in a stage of insane bloodlust.
Naruto found nothing wrong with such things and decided on doing exactly those things. Hearing another clang he turned to see a small and black dagger. He approached it slowly and picked it up and couldn't help but smile a deranged smile as he flowed through katas that seemed to come out of nowhere. "What do we have here boys a small freak child," sounded a rude voice.
When Naruto turned around he saw twenty bandits and gave them a smirk. While he contemplated how he was going to send their souls to the Reaper the knowledge came by itself and that all he needed to do was kill them with the dagger. Letting out a spine rattling chuckle he let out a small wave of killing intent before he rushed them slicing them in places that killed them on contact. One tried to get away from the massacre but failed and with a shout of," To the Reaper!" he was dead along with his associates.
He felt an influx of power and smiled his smile pondering if he should change his name to Shi and decided yes on it. He went back to the leather bound book, grabbed it, and started walking further out from the village wondering what sorts of souls he would send to the Reaper in his lifetime. He walked all the way to Wave Country killing all corrupt souls, knowing innately who to kill, and taking books on several subjects and weights. When he got to Wave he inhaled deeply feeling the corruption that surrounded the place like a blanket.
He walked and frowned because he hadn't learned how to walk on water yet, but then he saw a small paddle boat and he got in and rowed all the way to the mainland. He followed his sense of corruption and was led to a treehouse-like hideout and slit the throats of the snoozing guards outside the establishment. He freed all the slaves killing all others before a particularly strong evil soul made itself known and he shot off towards it finding a midget taking his clothes off and walk towards a chained up woman with a menacing smile.
Shi gave a snarl and the midget twirled around and shouted," Guards!" when they didn't come he walked to his cane and brought the blade out before rushing the child, believing he could take care of him himself. To bad that it was to dark for him to see the features of Shi for if he did he would have known that it wasn't good to rush the Reaper-like child blindly. Shi danced around the pathetic swings and looked disgusted before he sent Gato's soul to the Reaper. He cut the woman out and left his, tales will be known.