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I want to play a lot of missions to get the booster pack. Let's see what's in it. What is the likelihood of getting a Legendary card?

Totally get it but you working harder not smarter! the higher ego you have the fewer starbits you will earn per mission. You have the potential to earn double what you earning now if you get your ego down to zero!

I have only bought a few packs, but its a gamble. You guaranteed a rare card, but might not always be a great card! But you never know! I scored some sweet ones and sometimes not so sweet!