Origin of a grimm soul

I don't own Naruto or rwby

Naruto stared down at the hand in his chest before looking up at the one whom owned that hand his killer was someone who he thought of as a friend but now in his new monstrous form Naruto couldn't help but think that the outsides now matched the insides.

Sasuke smirked darkly as he pulled his hand from Naruto's chest watching as the red aura died away his smirk increased before griping Naruto's shirt or what was left of it and forced Naruto to look into his eyes as he felt them change Sasuke could feel his eyes become stronger "Thank you for your death now be washed away Naruto." and with that Sasuke threw Naruto into the river and making his way into the forest.

Naruto gurgled as blood trickled upwards mixing with the water as he fell beneath the waves.

In the mindscape

Kyuubi growled in annoyance it had just woken up months ago and now it was going to die Kyuubi began to grin as it heard its favorite voice "Hey Kyuubi is the dumbass dying?" Kyuubi nodded to the 'true/dark' Naruto.

Dark Naruto began pondering as to what to do when an idea struck him "Hey Kyuubi I got an idea." Kyuubi turned to him confused Dark Naruto smiled.

Outside the mindscape moments later

Naruto's world was beginning to fade from view unaware of his body leaking a black ooze leaking from the new hole in his body or the skull fox mask, bone like fox ears and tails growing on his body 4 whole hours passed within the water all searches had been called off an hour and a half ago and by now a thin sea of the black ooze covered the surface and animals were now beginning to return to the lake for the water.

The animals of the forest cautiously took drinks from the water drinking ooze as they did so and over the course of 5 minutes all those who had drank from the water began to change their bodies became pitch black and they began to grow bone like armor across their form this was the birth of the first grimm.

Naruto floated to the surface the black ooze had finally stopped pouring from the hole in his chest and the wound itself had sealed an angry red marking spread from the wound and over the armor around the wound several Nevermore scooped him gently from the water and laid him on the beach of the lake the newly made grimm gathered around there creator and master.

After a few minutes Naruto opened his eyes and was greeted with his new unintended creations all lying beside him all staring intently at him "What in the hell are you?" muttered Naruto when a sly voice whispered in his head "Why my dear idiot they are a part of us our hate for humanity given a shape…aside from me anyway…and for now it's time for you to take a little right Kyuubi?" Naruto's eyes dilated in fear before shrinking down to nothing becoming red as it did so leaving a pupiless eyes as the sclera faded into black as a red aura covered the now possessed Naruto.

The grimm surrounding Dark Naruto became more and more violent as the aura grew before Dark Naruto roared his first order to his new race "Go hunt!"

6 months later

It started out small people disappearing into the night and never returning then small groups of people then small town began disappearing leaving nothing but tiny traces of buildings and other human made structures.

The ninja villages weren't truthfully worried until they got reports about the large amount of these events happening and occasionally the odd beasts that were sometimes spotted near the lost town and then without warning Kiri vanished off the face of the map along with any spies of other village's that were in the territory long with all the towns.

This caused the remaining villages to begin pointing finger causing higher amounts of tension between villages increasing the death rate although by this point it was almost impossible to tell whither those who died in a fight or just plain disappeared as the bodies always vanished unless the body was taken immediately after they were killed.

In other news Sasuke had returned to the leaf after a quick scan over Orochimaru's jutsu library with his sharigan he left deeming Orochimaru below him and there for no longer able to train him and so he left for the one place where he knew he could get what he needed and be treated like a god Konoha.

The high tension between the villages lead to lots of fights which meant lots of opportunities to test his new jutsu and in turn become more powerful but since the village elders practically forced the council to allow Sasuke back into the village they also kept a close watch on his secretly of course 6 Root operatives at least at any given time for his safety and to make sure Orochimaru didn't make another attempt to get the Uchiha whom still wore the ass bow that was customary with those who followed Orochimaru.

But oddly enough Orochimaru's activity had gone silent in the last few months then Kumo went dark then Iwa and snow and then finally wind country and now here sits the new Naruto his eyes faintly glowed through his mask now lighting up with a dark purplish red while he sat on the gates of Konoha allowing his friends to handle the boring parts and then he looked down at the few already gathered with a smile as Sasuke the last member of the party was brought forward and forced to his knees sweating from the exertion of trying to fight his captors.

"Ahh the old gangs all here." said Naruto fake cheer in his voice as he dropped from the gate and landed softly on the ground before moving forward and stopping in front of the group.

The rookie nine forced to kneel before this 'stranger' Sakura spoke up first "Who are you how dare you do this to Sasuke?!" Naruto chuckled at her "And to think that I had a crush on you…what a waste of time."

Everyone froze only one person ever had a crush on Sakura Kiba growled "How are you Sasuke confirmed your death demon?!" Naruto smirked behind his mask and pulled down on his shirt revealing part of the mark in his chest "Yeah well obviously the reports of my death were greatly exaggerated but for real I met two things inside myself first the Kyuubi then my inner darkness and at first we fought for control over my body then we brokered a deal instead of trying to kill one another we merge." Naruto then moved in front of Sasuke and moved his mask to the side of his head and smirked before ripping the mentally disturbed Uchiha's eyes out leaving him to scream in pain and anger while the rest gagged at seeing someone's eyes tore out.

Naruto smirked "Can't have you messing around with those eyes of your now can we?" Naruto began rolling the eyes in his hand before putting one in his mouth and swallowing "Yeah learned not to let you Uchiha keep your eyes when I fought Itachi now he is a man that I can respect it is a shame that I had to kill him but unfortunately he was with a group that got in my way." Sasuke became quite as Naruto spoke and all was quite before Naruto put the other eye in his mouth and swallowed before Sasuke began to tremble.

"You filth demon beast you dare to take my revenge from me?! I will kill I'll kill you kill you kill!" Sasuke suddenly became quite as Naruto suddenly appeared in front of him and began to form a rasengan and whispered into Sasuke's ear "Does this seem familiar Sasuke?" before ramming the sphere of chakra into Sasuke's chest slowly earning more screams of pain and splashing blood across the ground and once the sphere could be seen poking out of the back of Sasuke's shirt Naruto canceled the technique and stood up before signaling for the grimm to drop the body.

Naruto's smirk became a wide smile as he turned to the rest of the group and nodded to his grimm and with that the grimm clawed all but Hinata, Shino, Shikamaru, and Choj's throat out.

"You all were saved by the grace of your past especially you Hinata this is more of an apology for the pain I caused you over the years due to my former ignorance." Naruto bowed his head before looking into Hinata's eyes and was greeted with a hurt acceptance.

"Is my family dead?" asked Hinata still looking into Naruto's eyes Naruto replied quickly and quietly "All of your guy's immediate family is alive along with most of those that don't carry your bloodlines but Hinata your clan elders are dead."

Hinata's eyes gained a bit of happiness earning a small gentle smile from Naruto before he closed his eyes and frowned slightly "I am going to leave and let humanity start again Shikamaru, Choj your family is in your compounds go and stay there for an hour by then all my grimm and I should be gone."

The two teenagers left in mute silence occasionally looking back worried about Hinata who wasn't dismissed but after a minute they were gone from view and Naruto collapsed to his knees.

"Hinata I have one favor to ask of you and after all of this I could understand you denying me but please kill me." Hinata froze as Naruto's words rang through her ears "Why?" asked Hinata quietly.

"I have no purpose any more my sole reason to exist was to get revenge on the Uchiha and get rid of the atasuki and to do that I had to get to the Jinjuriki before them but unlike them I took the long rout and I slowly untangled their chakra from one another before I absorbed the tailed beast while leaving the people alive and once that was done I attacked the atasuki base and devoured their members before consuming the husk of the ten tails and with my death there will be peace it may be only for a little bit but with my death chakra should disappear and the grimm as well so please Hinata end me." Naruto once again bowed his head waiting for a death stroke but to his shock Hinata gently cupped his chin and tilted his head upward before she desperately kissed him.

Once she broke the kiss she stared into his eyes with more determination than Naruto had ever seen before "Give me a child something to remember you by if you succeed I will…do as you ask." Naruto smiled gently and cupped her face "Ok then let's begin."

Naruto and Hinata left to the remnants of whirlpool country and Naruto succeeded in four months Hinata began showing signs at six months and by nine months two children a boy and a girl were born both were born with silver-ish blue eyes and a mix of their parents body types but beyond that they couldn't be any more different the boy looked much like his other even had small tuffs of blueish hair and two cat like ears on his head and a cat tail while the girl had blond hair and no animalistic characteristics.

Naruto was happy again he felt he had a purpose again with all the time spent with Hinata she easily convinced him to raise the kids with her but while he was with her over the past nine months and he felt his want to die fade he began developing a jutsu to absorb all the chakra in humans aside from the small amount required for them to live and once his and Hinata's kids were born he discussed it with her and so the jutsu was activated and the world was changed forever.

730 years later

Naruto looked up from his journal written in a long dead language before spotting an energetic young black hair girl running around a feisty looking blond as they exited a boat at the port Naruto smiled when he saw the girl's eyes they were the same as his children with a small chuckle Naruto spoke to himself "Seems that my genes still run strong after all this time."

Naruto got up with a smile "Might as well introduce myself." and with that he got up moved towards the odd pair.