Planar chaos booster pack contains 15 cards per pack. Distribution is 1 rare, 3 uncommons, and 11 commons. Some boxes contained packs with two rares. Since the second rare was in an uncommon spot, this had the effect reducing the amount of uncommons in certain boxes. These boxes appeared to have been evenly distributed amongst a case (six boxes). If you recieve packs from these boxes the distribution would be 2 rare, 2 uncommon, and 11 commons. Released in 2007, Planar Chaos is the second set in the Time Spiral block. The set contains 165 black-bordered cards (50 rare, 55 uncommon, and 60 commons).