The other big influence on the design was the two rares/mythic rares per pack. A common slot was removed to make room for the extra rare or mythic rare. This resulted in the rarities being shifted around. For example, normally in a large set, there are 100 (and sometimes 101) commons. Double Masters, because of the loss of a common slot, drops down to 91 commons. Uncommon stays the same at 80. The number for rares and mythic rares had to change because we didn't want any one individual rare/mythic rare showing up at a higher frequency than normal. In order to accomplish this, we ended up slightly more than doubling the rares and mythic rares. Rare is usually 53. It goes up to 121. Mythic rare is normally 15. It goes up to 40.