Useless boosters and repeated cards
It should be possible to change the offer of previous boosters in Mastery Pass. Why to open a Brothers Wars booster if I don't need it? If I mastered the Brothers Wars in previous pass and complete the cards... so why to open a booster now if I don't need it? When I would be able to open antique booster instead of it? We lose too much with repeated cards on Arena!!! And those are cards that we payed time, effort and money to buy! SUGGESTION: If happens to appear a rare card that I have already, why can't I even win a simple common or uncommon wildcard?! The same when it's Mythic! I already have four mythical cards, the fifth card I will lose dramatically, why can't I even change this "mythical" card for even a common or uncommon? Here in Brazil everything is expensive because the dollar conversion, we pay five times the original value.