In Magic the Gathering booster packs are 15-card packs you can buy at Magic stores and sites. They are perfect for increasing the size of your card collection, playing tournaments, or just getting new cards. It's always fun to open packs and see what all the cards are. A booster pack contains one rare or mythic rare, three uncommons, and eleven commons. However, sometimes the commons are replaced by land, tokens, and tip cards. Each booster pack is for a certain editions, like Worldwake, Scars of Mirrodin, Zendikar, Rise of the Eldrazi and etc
Although with most booster packs you get a rare, around every eight booster packs, that rare is replaced with a mythic rare. Booster packs can be used for a variety of tournaments as well.
==Some tournaments use an alternate rule called Rare Drafting. When the tournament using a rare draft is over, the rares, mythic rares, and foils (or anything predetermined to be valuable) are separated from the rest, and the winner gets to choose one of the cards, and the second player can pick one after that, and so on.