here is the thing: for 299 fee'z you can change THE ENTIRE PACK (not just the legendary card....) and this as many time as you want (however, this feature seems to bug for some people and if so you'll need to ask the support team for corrections...)
The mini pack gives you one legendary card that you do not already own. (but you cant change the card once it is decided...)
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--EXYLEME--"-oh mon dieu! ils ont tués Kenny!
-espèce d'enfoirés!"