Don’t let that stop you. If you tap the ‘Summon’ icon at the bottom of the main menu, you’ll be taken to the portal that allows you to summon ninjas either one at a time or on groups of 10. You’ll also see that you have multiple choices, including summons that cost you friend points and others that take Ninja Pearls, the game’s premium currency.
The friend summons have their purposes, mostly for producing fodder to level up the ninjas you actually want to use. But what you’re really interested here is the Ninja Pearl summons, because that’s where you’ll find the good stuff: characters that are three stars and up.
While it can be tempting to rush over there as soon as you have five Ninja Pearls, you really want to wait until you have enough for a multi-summon, because your chances of getting a four- or five-star ninja seem better that way. Be sure to check back often, because the game’s deals change semi-regularly, and you might find that the multi-summon is cheaper from time to time — like at launch, when there was a special one you could use three times for just 30 Ninja Pearls.
How do you get more Ninja Pearls? That’s where that determination comes in. Simply grinding out story chapters gives you five Ninja Pearls each time you clear one. And logging in each day can get you more, especially if you rack up consecutive streaks of days played.