Permanent

Zabuza and Haku woke up from Shin's genjutsu, but didn't find anything wrong.

Because Shin had casted Tsukuyomi on them, every detail was within his control, even sense of time, instead of the usual process of a long time passing in genjutsu and seconds passing reality, Shin did just the opposite.

Seconds had passed in genjutsu as Shin had completed the whole process in minutes.

" What did you do with the bones? You casted a jutsu, both of you got covered in smoke, now you have turned him somehow? "

That was what had happened from Zabuza and Haku's perspective.

Kasamaro shrugged, because Shin had already left the room before cancelling the Tsukuyomi.

" This is an Uchiha only transformation jutsu, permanently changes your body, it's a forbidden jutsu specific only to clan leader. "

Shin spoke nonsense like drinking water as Zabuza and Haku bought it completely, they really hadn't heard of such a jutsu before, forbidden Uchiha jutsu seems about right.

But Haku was eyeing Kasamaro with a regretful expression.

' But I liked Shin kun the way he was before.. he is still Shin kun..but.. '

Haku was trying console herself but she was right.

Kasamaro was for all intents and purposes was Shin, he had built this body entirely from scratch, even the original bones were discarded, this was a new body Shin had created, which had no connection whatsoever to the person who's dna it was made from.

Like an identical twin, very similar to Sasuke and Shin's case actually.

But while Haku was trying to think what to feel, Shin saw what she was thinking and shot that thought right in it's foot.

" Worry not, I can transform back to my original self as well, permanent means, now this is the only guy I can ever use this jutsu on, I still retain my original body you know. "

Haku smiled cheerfully, she was relieved, she would truly feel weird if she had to associate Shin with a completely different man.

Now she didn't have that problem, and Shin didn't lie either, like path's of pain, he can summon himself to Kasamaro or Kasamaro to him.

All it would need is tweaking it a little to make it look like lifting a transformation jutsu.

" Alright, but what would you do about the shikotsumyaku? "

Asked Zabuza, just a permanent transformation wasn't enough, and he 100% didn't care how shin or himself looked, if it increases your strength, it's good.

He wouldn't have ground up his teeth to spiky ones otherwise, a fine tradition of seven swordsman of the mist.

" Like I said, it's a forbidden jutsu, it's not that easy to be called forbidden. "

* Spish *

Shin bones grew from his palms as his flesh was torn apart, he didn't have that censored transformation from anime, he had the authentic Kaguya clan shikotsumyaku, which actually makes holes in your body.

Haku saw it happen and was very nervous for Shin's well being, how can she not, she can see inside the flesh of his plam and it's oozing blood.

" Oh, does it hurt? "

Asked Zabuza, to which Shin retracted the bones back in and his wounds healed automatically, that's right, that's how scary Kaguya clan's regeneration was.

Zabuza was very impressed at that.

" I heard Kaguya clan who had awakened shikotsumyaku had terrible healing abilities, seems like it's true, I can see why they were such a reckless bloodthirsty bunch, who wouldn't if you were unstoppable. "

Zabuza commented, admiring the raw potential of this ability shown by Shin, after Shin had felt the changes on him, he told Zabuza the answer to his question.

" Yes Zabuza, it does hurt, about as much as it would if a hole was poked through my palm. But this body stops the flow of blood pretty quickly so I don't bleed out, another benifit. "

Haku was looking sad as Shin shook his head with a smile.

" Don't be sad Haku, I am not that weak willed, if some pain can help me do what I want, I'll not hesitate. It's for me and for you. "

Haku managed to give a small smile but she was still unhappy with Shin getting hurt.

So she found a solution.

" Shin kun can you teach me that jutsu? I'll become this man as well, we will switch. "

Shin was a little taken aback, he still wasn't used to trusting anyone, but Haku's repeated attempts to help him was shaking him a little.

Say what you want, but Haku was pure, she wanted to help Shin with her heart, understanding that, Shin decided he won't treat her badly either.

Zabuza's loyalty was okay, but he had his own pride, Haku wasn't like that, unless Shin asked her to kill Zabuza she will probably follow him anywhere.

" Haku.. thank you. "

So Shin smiled a genuine smile at her as he gave a wry one shortly after.

" I would teach you the jutsu, but you can't cast it without a Sharingan, that's what makes it an Uchiha forbidden jutsu. "

Haku was feeling regretful but now that Shin had decided to take care of her, he will do just that.

" But don't worry, you can still transform into him, when shikotsumyaku isn't needed, I'll cast the transformation jutsu on you, nobody can see through one cast by a Sharingan. "

Like Naruto had transformed his toad summon into nine tails, it was possible to transform someone else as well.

Haku was now finally happy, she can help Shin take some burden, she was satisfied enough with that.

She was just that simple.