Third Person's POV;
The absorption of Gyuukie's Chakra was different for both Dexter and Kurama. It didn't hurt like it did with Shukaku. In fact, the absorption itself was not different from Choumei's. What differed was the effect it had on both of them.
For the first time it didn't feel pleasurable for Kurama, it itched. Her tails itched in an annoying way and she felt how her body changed. Over the time it took Dexter to absorb Gyuukie's Chakra, which was three full days, she grew a tenth tail. Her fur turned white with her hair doing the same. Of course, this wasn't permanent and could be changed, but it showed that her base form was no longer in her orange-red color.
She felt how her Chakra capacity increased beyond what should be possible with Gyuukie's Chakra. A third eye formed on her head and her skin paled significantly. She now resembled an albino with her skin and hair color.
She also knew that the Reaper Death Seal was no longer a problem, she could escape whenever she wants to. Something she would only do if it doesn't kill her Dexter.
At the end, she was confident that she was the most powerful being on the planet, next to Dexter. Because he did change as well. In simple terms, he was no longer human.
His already absurd amounts of Chakra were again increased and fused with his body, changing his cells and making him into something like her. He now was a construct of Chakra too and could, with enough practice, change his body to his liking.
His Rinne-Sharingan eyes turned red and a third formed on his forehead. His hair, as well as his skin, became white as bones and his body became more sturdy. This were all the visible changes. The largest was his new status as a Chakra being, he was fairly sure that he now knew how to use his third eye.
Only the basics, but he still somewhat knew how to travel between dimensions and also how to enact the Infinite Tsukuyomi. On top of this came a large increase in Chakra control. It all felt natural as if the Chakra itself wanted to be used by him.
But not all was good and well. Dexter had no problems with his new power, his body still had the godly constitution of [A Body without a Limit]. He could hold millions of times of the energy he now possesses without being in danger.
Kurama was different, the moment the changes were complete she felt that thinking was harder than before. There was also a desire of gaining more power. These changes were at first ignored by her, but the moment she really considered killing Dexter, so that she could absorb his Chakra, made her cancel her earlier dismissal instantly.
This was a problem and has to be spoken about.
So after three days Dexter opened his three eyes for the first time since starting the extraction and felt good beyond anything he has felt since being born into the body of Naruto.
“Yo, is it finished? You look cool, is nine-o now ten-o, everything cheerio?”, asked B. He had dozed off a few times during the three days. The extraction didn't hurt and his link to Gyuuki wasn't weakening, so he allowed himself to sleep a few hours a day.
“Yes, everything went well, all that is now left is the creation of Kura-chan's body. Thank you, B, without your agreement we would have to fight you, which might have destroyed most of Kumo.
Here is the promised rap book”, said Dexter. He then gave B a thick book with rhyme suggestions and teleported both of them back into B's room. There they were greeted by A who promptly hit B in the face.
“Where were you? And who is that?”, asked A with a snarl.
“Yo bro, this is nine-o, now ten-o. He asked to have some of Gyuuki's Chakra”, answered B from inside the wall.
“And you gave it to him? Just like that, without asking me?”, asked A angrily.
“Surio, he would have taken it by force if I haven't given it to his girlfriend and soon to be wife of course”, he replied, while stepping out of the rubble that was once his wall.
A turned around and glared at Dexter.
“Your clothes look similar to the ones of the Uzukage, are you him?”, he asked, still with an angry tone.
“Yes, I have collected the Chakra of every Bijuu so that I could make mine into the ten tailed Juubi. Yours were the last and I made sure that they will have their strength back the fastest. Thanks to their cooperation I wasn't forced to fight them”, Dexter answered calmly.
“All of them? What about Iwa's or Kiri's?”, asked A a little surprised. He hasn't gotten any information about the death of their Jinchuriki.
“They are alive, but without the strength of their Bijuu for the next few years. B and Yugito will be at full strength in less time, probably lesser than a year”, answered Dexter.
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“You know that this could be seen as an act of war?”, asked A with a raised eyebrow.
“Yes, but it matters not. Now I'm able to give Kura-chan a body and anything else is not important. Kumo, Iwa, Kiri, Konoha, Suna and even Uzu are nothing in comparison to my Kurama. I will now go. Uzu will leave Kumo alone and we don't seek war with you”, said Dexter and before A could reply vanished with a white flash.
Dexter reappeared inside a deep forest far away from any human settlement.
°Dex-kun, we have a problem°, said Kurama suddenly.
°I'll come inside°, replied Dexter instantly and went to their shared mind-place.
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Dexter's POV;
Kura-chan sounded worried, so I hurried to get to her. She was inside the living room, sitting on a chair and holding her head.
“You said there is a problem?”, I asked while taking in all her new changes. Her new white hair and paler skin were looking good. The third eye will need some time to get used to, but that was the same with mine and we both should be able to close them.
“Yes, there is a problem, the Chakra, something is wrong with me”, she said with a slight tremor. She then rubbed her temples as if she had a headache.
I walked over to her and stroked her back softly.
“What happened? From the look of it, you changed into a ten tailed Bijuu. We both somehow are now like the Juubi. With me having slightly less Chakra”, I said.
“The Chakra, it's.. as if it has a mind of its own. It wants me to get more”, she said slowly and grabbed my hand. The next moment she squeezed hard and spun me around. I was now with the back on the table and she loomed over me, eyes wide and new rows of sharp teeth grew from her mouth.
“Kura-chan?”, I asked softly. She had a hungry glint in her eyes, yet the moment she looked at mine she reeled back in shock. Her new teeth vanished the same moment and her face looked shocked.
“I'm sorry, since the transformation I have this growing desire of gaining more Chakra. And you smell so..so... delicious.... What is happening Dex-kun?”, she said and looked at me with fearful eyes.
I tried to go over to her, but she pushed me away with her tails. “No, please stay away! Your scent, it makes me lose control. I can barely hold myself back”, she said and distanced herself farther away.
“Okay, so you are telling me that you gained the need of getting more Chakra?”, I asked to confirm the problem.
“Yes”, she simply said. Hmm, this might only get worse with time. She resembled the Juubi with the face she made a few moments ago. Is that why the Juubi isn't more than a raging monster? Could it be that it can't control the massive amounts of Chakra it has?
Why isn't it affecting me then? I do have a little less than Kura-chan, but it still dwarfs the amount I had before getting Gyuukie's..... Wait, I still have my wish for a limitless body. Is that why I am in full control? And then there is the [Calm Mind] skill.
“I think I know what is happening, you are getting crazy from the amount of Chakra you now have. Your body can't handle the stress and the mind slips into pure instincts or gets influenced by the Chakra itself”, I said in an attempt to explain what happens.
“So what? Anything was for nothing and I will become more feral until you have to put me down before I lose control and attack you? I don't want that! I want to be with you. We wanted to take strolls on the shore of Uzu or eat some of Dan's chicken dishes.... I want to wake up next to you while knowing that I am not only in your head”. Her voice broke at the end and she was sobbing openly.
I so wished to go over to her and hug her, but her tails would keep me away. Too strong were her fears already.
There were three solutions. The first would be to let her ignore the problem, she will most likely someday lose control and attack me. So this one was out. The second one was even less on my might do list, it was killing her.
And the last one I came up with in this short amount of time was to take some of her Chakra away. We would have to seal half of her Chakra, probably in me, as the Reaper Death Seal would be perfect for it. The other half should be able to handle the Chakra.
“Kura-chan, I think it would be possible to seal one-half of your Chakra into the seal, while the other half, the half with your mind, will be transferred into your new body. This way we might reduce the amount of Chakra and automatically stop the influence on you”, I said after a pause.
Her head snapped in my direction, her eyes wide. “No!YES!... Do it, it gets harder”, she shouted and I left the seal the moment she finished her sentence.
This will take most of my Chakra, the body will need to be as strong as possible, with all of her skills available. It needs to be a Chakra construct so that she can still transform her body, yet at the same time, it's not allowed to be incorporeal. And I have not as much time as the Sage of the Six Paths, so there was no maturing time. This is why it will take most of my Chakra.
So I clasped my hands together and opened all three eyes for maximum Chakra control while sucking Mana in at the same time for a bigger boost.
“[CREATION OF ALL THINGS]!”.
Bones began to form in front of me, first the marrow, then the skeleton. The form was that of a woman. Muscles, blood, organs, cells the brain, basically, a whole human followed. On top came the skin and hair, her white ten tails and her fluffy ears.
Now I had a human body, it was stronger than any natural human, but still not enough. I pumped Chakra into it, enough to give every Bijuu a run for its money.
The amount of Chakra was so much that the ground around me cracked, the sky turned black and a storm began to form. Birds and forest animals were surely running away from the Chakra output I was creating.
The body absorbed the Chakra, it got stronger, sturdier and then changed. It started with a weak glow that turned brighter and brighter until the whole body glowed in a bright green light. This took more than two hours and the finished product was Kura-chan's normal body form with the constitution and capacity that could easily take her previous nine-tailed form.
On a side note, I noticed that my Chakra turned green and was no longer blue.
However, that wasn't what mattered now, what matters is that I now have to separate Kura-chan's Chakra from her and push her mind and half of it into the body. I reached out towards her Chakra. It was a burning red ball and lashed at my probe the moment I got into contact. It started to suck on my own Chakra before it reeled back right after.
Which was good, because it meant that she still had some control. I willed my Chakra to trap hers and then tried to separate the ball into two halves. It didn't work. It tried to eat my own Chakra now more often and was starting to wiggle itself out of the trap.
“Sorry Kura-chan”, I whispered and forcibly separated the ball. It looked as if a butcher knife was hacking a piece of sturdy meat in two. I had to attack the same place over and over, or it would have melded back together.
All this while hearing the painfully screams of Kura-chan. This wasn't an easy and painless way, it had the finesse of a butcher that was cutting bone and meat. For the first time since I can remember I felt pain from causing pain. Her pained wails cut as deep as I did to her core.
Her Chakra wasn't keen on being separated and tried to fight back, it first tried to stitch itself back together, but the stitches were cut faster apart than they were made. So it started to shoot spikes at my own core. Red spikes shot into my green core and pierced it in an attempt to both absorb me and stop me.
It hurt like hell but was nothing to the mental pain that came from Kura-chan's wailing. So I gritted my teeth and continued with more force. I almost didn't notice that I started to bleed from my eyes, ears, and nose, so focused were I on the things inside me.
And then, after countless seconds filled with struggle, my metaphorical butcher knife came down for the last time and cut Kura-chan in two. I held both of them away from each other and guided one of it towards my hands. It was the one I heard the sobs comming from.
The other I put into the Reaper Death Seal and closed the gates, not knowing if it could do me harm.
Kura-chan has now reached my arms and I put my hands on her body, from where I then began to push the Chakra inside. She was still way more powerful than all of her siblings combined with herself, but the overall amount was less than half of what she had before the separation.
I tried to hurry and pushed her inside as fast as I could, this would have been the death sentence to my arms if it was before the transformation. Now it only left burned skin and some internal damage.
Then, I don't know how long after I started, it was finished and all of her was inside her new body. I fell down and hugged her body, totally exhausted and only barely noticing that I forgot to make her clothes as well.
I gathered the last remains of mental strength and teleported us inside my bedroom in Uzu, a moment later exhaustion overcame me and I fell asleep.