I want to cap this at three or four, any more and it'll be too chaotic which I agree with. When it comes to aging someone can be reborn as any age, like an old man can return as a child. It'll be a way from preventing a character from becoming too old to the point where they shouldn't be alive anyway due to real advanced age. For each reincarnation I decided that I'll be hashing out details with the writer in PMs, after initial character creation no one is going to know anything about a character's new form without some guess work or otherwise.