You can know how close you are in each treasure by purple ninjas that you got in. You get a purple ninja every 70 seal scrolls you spend. For example in kage treasure: you go in recruitment and then you click the "i" *on from kage treasure and see all purple ninjas. Then you go to your ninjas and see how many of them you got. For example if you have 5 of them (also be careful if you got dupes too), you do the math: 5x70=350. You get a super rare in kage for about 1k seal scrolls so you have 650 more to go. @Qv told you how many seal scrolls for a super rare each treasure need