The Collector Booster is aimed at the player who values collecting the cards. It's designed to be the best value for people looking to prioritize collecting hard-to-find cards. You'll have more access to foil cards as well as to the various special treatment cards and will be the only booster with extended-art cards. 

Collector Booster Contents:

• 4 foil commons, common dual lands, or basic lands
• 2 foil uncommons
• 1 foil showcase basic land
• 1 extended-art rare or mythic rare
• 2 foil rares or mythic rares, or foil extended-art rares or mythic rares
• 2 showcase commons or uncommons, or a borderless card
• 1 showcase or borderless rare or mythic rare
• 1 foil showcase common or uncommon, or a borderless card
• 1 foil showcase or borderless card, any rarity
• 1 foil token