well lucky is kinda ... not true as far as ic an tell (own expierence and from other) the chance too get a rare increase everytime you draw a *ty common 3 star aka. zabuza. You have too draw around 5-10 times ten-draw = min. of 50 seal scrolls if ur unlucky around 100 seal scrolls. If you draw a rare ninja the increased chance is gone and you have too draw again .... and so on.

Ofc you could be lucky and draw from first time a jackpot ninja but cmon .....

more like every 7x10.

Draw from tendo for rares since you can get all rare ninjas beside chiyo chika collection for free in the game.