An example of a Sealed Deck Format is a Booster Draft, which also comes in two types of formats. The first is a basic version, where each player receives 5 unopened booster packs. Then once they have been told to, each player has 40 minutes to open their packs and build a 20-card deck using only the cards they pulled from their packs. This is the format used at Sneak Previews. When doing a Booster Draft, the following rules apply: