Disclaimer: All characters from the Naruto series are the property of Masashi Kishimoto. I am not seeking any kind of profit from this fanfiction.
There is a legend that has been passed down through generations. A long time ago in the Village Hidden in the Leaves, a nine-tailed-fox suddenly appeared. Its tails lashed out, smashing mountains and sending massive tidal waves crashing to the shores that flooded all of the beaches in the area. The ninja rose up to defend their village. The men and women fought admirably to slaughter the beast. People were covered with their own blood that seeped from wounds sustained during the battle, but the demon still remained unscathed as it mutilated the corpses of its victims. That monstrosity was like nothing they had ever encountered before. It was like the fox was from some other world.
The fox was crouched in a feral position, emitting fierce snarls that shook the ground like an earthquake. Its fur was the color of the sunrise and its scarlet eyes pierced the night sky with their murderous stare. The full moon was blocked from view by the demon's immense size and created a dark silhouette that spread fear to anyone who dared to look upon its form. A pair of enormous ears was perched atop its head that generated gusts of wind every time its head whipped from side to side as it devoured its victims. Its hot breath mixed with the cool night breeze to produce a smoke that flew from its nostrils and filled the air with a putrid odor that smelled of rotting flesh. Dark blood was smeared across its lips and rained down with every turn of the head. It was easy to tell from just looking at the beast that a single one of its paws was enough to annihilate six large trees, however, it preferred to lash out its tails in every direction which resulted in even greater destruction. The paws were reserved for the purpose of crushing the people unfortunate enough to have been below them when they came smashing down to the Earth.
Orders were being barked from all sides. "Hold the attack and wait for the Fourth Hokage!" screamed one of the ninja.
"It's getting closer; don't let it near the village!"
That night, one shinobi faced the nine-tailed fox in mortal combat. The Fourth Hokage would immortalize his name forever after that battle. It was a Hokage's duty as leader of the Hidden Leaf Village to protect the citizens that he or she was in charge of, even at the cost of their own lives. The Fourth knew what his job entitled as he summoned a giant beast of his own to fight the fox that endangered his subordinates. A giant ruby red toad wearing a deep blue kimono lined with white stood before the ninja with the Fourth standing proudly like a heroic storybook character atop its head. The Fourth's height combined with that of the toad allowed him to be only a head taller than the crouched demonic fox that trampled the Earth in front of him. An old wooden pipe protruded from the lips of the toad and sent dark clouds billowing up into the sky.
The Fourth shook violently as he stared into the face of the beast before him. Those wild eyes engraved themselves in his mind, and he felt his blood run cold, but he summoned up all his willpower and preformed the hand-sign that would seal both of their fates forever. A blinding light flashed through the sky and the beast disappeared while the Hokage's lifeless corpse lay atop the head of the toad. One final cloud of smoke flew upwards from the pipe and disappeared into the night. In that moment, a newborn boy was chosen to be the container of the monster's spirit, condemned to years of torment and hatred from the other citizens in the village. This is his story.