Mystery Booster is a booster pack release inspired by those Chaos, Cube, and off-format drafts. It is, in effect, a chaos draft in a pack. The set itself contains a whopping 1,694 reprints from all throughout the game’s history plus 121 copies of something new and surprising. You could fill an entire eight-person draft and not see the same card twice. Each booster box contains 24 sealed packs of 15 cards.