Okay, so this is my first fanfiction, and I'm really going to try and make something interesting and fun to read. Please review at the end, and give me some pointers please. Thanks.

DISCLAIMER: I do not own naruto in any way shape or form, if I did, do you really think I'd be writing this? Hell no, this'd be canon.

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Naruto looked at Sasuke, who was now right in his face, fist plunged through his chest. The chirping of the Chidori echoed through out the Valley of the End. Blood flowed from all of Naruto's wounds, while Sasuke was winded, and looked worn out. They both continued to stare down each other. Sasuke's body was marked with the curse of the heavens.

"Naruto, you were the only one I considered family, you are like a brother to me." Sasuke stated his voice flat and emotionless.

Naruto couldn't say much, blood poured out of his mouth. He could feel the taunts of the Kyuubi roaring in his head, to take his power and crush the Uchiha. The blonde gave into the whispers of power, and red chakra began to surge out of him. It was completely covering his chest, when it suddenly stopped. Originating from his heart, a black chakra began to seep on top of the demonic chakra, taking control. The unfamiliar energy sent a pulse, sending Sasuke flying back. It then wrapped around Naruto, just like a cocoon.

Sasuke picked himself up slowly, standing on wobbly legs. He looked up to see pure black encasing Naruto's form. He could feel a confliction of power inside it, each trying to dominate. He stood back a bit, and prepared to end it. Making a few handsigns, Sasuke charged Naruto once again, lightning gathered in his palm. He let out a battle cry, and thrusted the Chidori forward. It was stopped by a pale skinned hand, ending with black claws.

Naruto was going through a series of emotions, a whirlwind inside his head. He wanted to access Kyuubi's power, and he could feel it, then it just stopped. Instead, a different feeling embraced him, and he couldn't stop it. It washed over him, and he seemed to be suspended in absolute darkness.

Inside Naruto's head…

Naruto couldn't see anything around him. Darkness. Just darkness. He looked around and screamed out for anyone.

'' Is anyone here!" He yelled, "C'mon show yourself!'' He couldn't hear anything either. It seemed like he was everywhere and nowhere at once. He couldn't explain it. He tried to move, but couldn't, something was holding him. It was a weird sensation, and he wished it would end. Then all of a sudden, he heard a voice.

"Allow me to finish this. Do not worry young one."The voice boomed.

After hearing the loud voice, Naruto attempted to look around, but forgot he couldn't move. "W-who's here?" He asked, slightly stuttering.

"Do not worry about that. Just sit back, and relax."It said, and everything seemed to stop

Back on the outside…

The grip on Sasuke's wrist tightened, and the Uchiha winced, but refused to make a sound. The blackness began to recede, until it was a slight haze around Naruto. Sasuke's Sharingan eyes couldn't believe what he was seeing.

"N-naruto wha-"He went to say before he was interrupted by a fist planting itself in his gut. He flew back, and rolled on the water. He held his side, and looked up at Naruto.

Naruto's form was finally revealed. His normally healthy skin was pale, like he had seen a ghost. His fingernails were long gone, replaced by sharp, wicked looking claws. His once cerulean blue eyes were also replaced. His eyes were now onyx black, and his sclera was bloodshot. Naruto continued walking towards Sasuke, in a menacing strut.

Sasuke stood up slowly, his bloody red eyes showing determination. He ran forward, and aimed a shot at Naruto's face, and the blonde ninja ducked under it. Naruto went to return the favor, aiming a straight punch for the solar plexus. Sasuke's cursed eyes however, saw it, and he spun around the hit. He jumped back, to create distance between the two.

"Whatever that power is Naruto, it won't help you now. You are nothing compared to me, baka." He then chuckled, and his hands flew through very familiar signs while channeling his chakra, and he ended on the sign of the horse. He brought his left hand to his mouth, forming a circle, and let loose a long breath.

"Katon: Goukakyuu no Jutsu!" Sasuke yelled, releasing a fireball of huge proportions at Naruto.

Naruto's now black pupils watched as the ball of fire came towards him. His eyes narrowed, and he brought his hands into his trademark seal. With his fingers in a cross formation he grinned, but this was full of malice.

"Kage Bunshin no Jutsu." He said, his voice was devoid of his usual enthusiasm, and it sounded a little more evil. With the call, two altered Naruto's formed on either side of him. The one on his left grabbed him and threw him up, and the fireball incinerated the two clones. While in mid-air, Naruto made another clone, which threw him towards Sasuke. Sasuke and Naruto both threw punches, and collided with the other's head; each smirked, thinking they won. They were both rewarded with the great surprise of Kawarimi. Two logs fell into the water.

With Sasuke…

Sasuke was on a small patch of earth in the water. His back was up against the mountain, to ensure there were no surprise attacks. With his Sharingan activated, he could see practically everything in front of him. He continued to look in every direction, in hope of catching sight of the blonde. He grunted in frustration when he still saw no sign of the blonde.

With Naruto

Naruto stood on top of the cliff, looking down at Sasuke. He looked at his hands, and saw that the claws were beginning to recede. He decided enough was enough. He watched as the Uchiha's body stiffened with anger. Naruto chuckled, and jumped off the edge. He was preparing to smash Sasuke in. At the last second, Sasuke caught a glimpse of movement, and moved just out of the way. Naruto's fist connected with the ground, causing a small crater to appear.

Both fighters rushed at each other, and engaged in a taijutsu match. Neither one seemed to have the upper hand, both matching the other perfectly. Little by little though, Naruto seemed to be pushed back. Sasuke smirked.

"I told you, you could not match up to me. Now I'll prove it." Sasuke said confidence full in his voice.

Naruto merely glared at him. His claws were almost gone now, and his color had begun to regain. His eyes seemed to be lighter as well. He still fought with ferocity. He would not back down, and neither would Sasuke. The black haired teenager continued to gain the edge. It looked like Naruto had no chance, until the both jumped back, and prepared their final techniques.

Sasuke once again, for the third time, charged up his Chidori. His right hand was thrusted down towards the water, and his left hand gripped the opposite wrist. It started off with a little cackle, and eventually became a full-fledged current.

Naruto, without the aid of a clone, held his arm out, palm facing the heavens. Blue chakra began to swirl around in his palm, and it slowly became tainted with black. The Rasengan was fully completed in his hands, though it looked more malicious now. They both rushed at one another, ready to end this conflict.

"CHIDORI!" Sasuke yelled, both his voice and his attack slicing the air.

"Rasengan." Naruto said, his voice still flat.

The opposing forces met, and for a minute, nothing happened. Then, a dome of energy expanded to cover them. It continued to flash from blue to black. This continued for what seemed to be forever, as if time stopped around them.

The energy dome that concealed both Naruto and Sasuke began to shrink, until it collapsed on both ninjas. When it fully disappeared, both of the fighters were back to their original forms, and unconscious. They both had fallen on their stomachs, their heads level with each other, facing the other.

The two teenagers stayed like that for another hour, the rain had already begun to pour, but their bodies would not allow them to wake just yet. After about another half hour, Shikamaru, along with Gaara, Temari, and Kankuro, came into the valley. They saw all the destruction that had occurred, and began searching. Gaara had his sand crawling everywhere, acting as an extended sense of touch. Kankuro had both his puppet's roaming around, connected to his fingers through chakra strings. Temari was on her fan, riding it in the air, to get an aerial view. Shikamaru, unfortunately, had to search normally.

"So troublesome." The young shadow manipulator muttered to himself.

He continued to walk around, his hands stuck in his pockets. He was also kicking a rock, to somehow sate his boredom, but wasn't successful. He went to look in a little crater, until he heard Temari yelling from above.

"I SEE NARUTO! HE'S WITH THE BASTARD!"She screamed from the skies. In a matter of minutes, the sand siblings and Shikamaru were at Naruto and Sasuke's bodies.

"What the hell happened here?" Kankuro said, shocked at all the collateral damage.

"I do not know, Kankuro. But it was surely something bad." Was all Gaara could say, in his usual monotone voice.

After a little more conversation and a debate on how they would bring them back, everything was decided and they were off. Gaara was carrying Naruto in a stretcher made of sand, while Kankuro was hefting Sasuke using Karasu. They began their journey back to Konohagakure.

A/N- Well, this is the first chapter of my first story. I hope you guys thought it was interesting. No, I'm not going to explain what exactly this new power is, but it will be explained how he got it in the next couple chapters. Remember to review, and help me out.

Until next update,

Sullie-Superhuman-