Board Thread:Questions and Answers/@comment-24.107.66.12-20150514220750/@comment-2185884-20150515040158

I'd say it's all up to chance I feel like. I've gotten mostly 4 star units, then like three 5 star units. only one 3 star unit. I got one 6 star unit once my luckiest summon. Your best chance is to save up for when the have the increased chance events, but even if you get only 3 star units they're usually good, just have to go through trouble of evolving them. Over all id say its all chance, because even when I got 5 stars they were worthless.