i got everyone in the shops because i was just collecting ninjas Hahaha LOL
If you dont really need those ninjas on the shop then save the points for later.
They are gonna update the shops soon and someone you might like may be there.

I see, thanks for the info. I am not sure for which ninjas i should aim so i guess i'll just save up for level 70 i will have lots of scrolls till then and also i seem to be weaker than players on my level and i don't know the reason and it's really frustrating. Losing to people and the survival trial seems so hard i can't pass the 11th and 12th challenge, because i have no ninjas left alive lol