Hello,

This is one of the skillbooks' effects.
Hopefully it clarifies your question, have a nice day :)

Thank you for the quick response.
Is there a thread or something that explains these changes?
And we dont need to buy the books for the mysterys to have this effect? Because i didnt purchased sasukes books, gaara and haku doesnt even have the skill books system yet.

If your Sasuke was not skillbroken and this issue occured, then it is probably a bug, I'll let our team know about it, will look into it :)

Concerning the changes, you can see them when you hover over the skills in the Breakthrough tab

You don't need to buy books. All you need is to collect enough Ninja Fragments for a book to be activated.

Ninja > Training > Breakthrough.

You can choose to update your Sasuke to version 1 or 2.

Version 2 is where your Sasuke's barrier won't disappear, unless it was taken down by someone such as Roshi or Tendo.

Version 2, also allow your Sasuke's chase to use Chidori Stream as you may have seen in Orochimaru's TI.

There is a ninja skillbook somewhere online you can look up. I dont remember where. I'm sure you find on Google :)

For me, I am still deciding whether I should go version 1 or 2.

I don't see where you choose to update 'version 1 or 2' in Breakthrough, at least from my screen. Do you mean the 150 frags Kirin +1? Quite certain it does not involve Chidori Stream as well. Maybe you could take a screenshot to show what you're referring to?

I wonder how many fragments it takes to get Kirin to +2, especially since +1 already takes 150.

hes talking about skill mutations which arent released yet, this is the fluid system people refer to from china, it gets released at a significnatly later date, skill books function far differnetly

kirin+2costs 200 frags