>>72653450There are 28 unique variations of those Uproar cards. There's a famous problem in statistics, called the Coupon Collector's Problem, for calculating the number of cards you'd probably need to absolutely guarantee all 28 unique variations. That number in this case is about 110 card purchases.
However, this assumes the same probability for all cards. If the foil autograph ones are rarer, the number of trials goes significantly up.
