I am going to post 3 chapters daily for now.
This is a translation work, but i am in need of some pocket change soooo....
100 power stones = 10 extra chapters ;
200 power stones = 20 extra chapters;
300 power stones = 20 extra chapters;
500 power stones = 55 extra chapters;
600 power stones = 65 extra chapters;
As for range between 400 it would depend on my mood 😉😉😜. But rest asured it will be more than 40.