Each Collector Booster contains 15 cards + 1 token:

• 1 foil showcase card / borderless card of any rarity
• 1 foil showcase / borderless common or uncommon
• 1 non-foil showcase / borderless rare or mythic
• 2 non-foil showcase / borderless commons or uncommons
• 2 foil regular / borderless rares or mythic
• 1 non-foil extended art rare or mythic
• 1 foil showcase basic land
• 2 foil uncommons
• 4 foil commmons or lands
• 1 foil token

That’s quite a lot to take in. Basically what you’re getting is:

• 4-5 rares or mythics
• 10-11 commons or uncommons
• 1 foil token

All of these cards are either in foil or have a special art.

MAGIC THE GATHERING - COLLECTOR BOOSTER PACK (ENGLISH) - CORE SET 2021 is categorised COLLECTIBLE CARD GAMES / MAGIC: THE GATHERING / PACKS / BOXES and sold by l'Imaginaire, a store and specialised website.