Ok, I think we should have the Rin'negan, and here's how I think we could do it, with the knowledge we have of it.
It would have 4 resets, I'll go through what I think each would cause.
First Reset -
You gain the constant buff, Rin'negan, all it does is provide a small defence increase.
The specialty Rin'negan Kekkei Genkai, which has one move Shōten no Jutsu it costs 5 points, and lasts 2 rounds, it creates a perfect clone of your enemy which attacks weakly and takes all damage.
Also, from Acad you can access all Specialties, as Rin'genan users can master all Jutsu types at early ages.
Second Reset -
Rin'negan buff increases slightly
You gain the abililty to use multiple bodies, these bodies are gained when you defeat someone in PvP. You have that person name added to your bio, and when you would die in the forest, that body dies instead, leaving you alive.
At this reset you can only have two bodies at once.
A Specialty move Multibody Defence, is added, is costs 4 points, it goes for as many rounds as bodies you have, eg, you have 2 bodies, it lasts 2 rounds. It provides a defence buff.
Specialty move Multibody Attack is added, it costs 4 points, last for 3 round, it attacks once for each body you have each around.
Specialty move Rin'negan Beast Summoning, it costs 12 points, lasts 1 round, It is one great hit, which attacks once for each body.
Thrid Reset -
Rin'negan Buff increases slightly
You can now have 4 bodies at once.
Forth Reset -
Rin'negan Buff increases slightly
You can now have 6 bodies at once.
I wont to know what you think of this, is it too much, should I make the Multibody style weaker, harder to use? I want input about this, I'm also offering to code this, as I think I can do most of these things.