Each Collector Booster will have the following 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 (45 rares, 8 mythic rares)
- 2 Foil rares or mythic rares, or foil extended-art rares or mythic rares
- 2 Showcase commons or uncommons, or a borderless card being previewed by Martin Juza on June 8 (5 commons, 6 uncommons)
- 1 Showcase or borderless rare or mythic rare (8 rares, 17 mythic rares including 5 versions of mythic rare Teferi)
- 1 Foil showcase common or uncommon, or a borderless card being previewed by Martin Juza on June 8 (5 commons, 6 uncommons)
- 1 Foil showcase or borderless card, any rarity (5 commons, 6 uncommons, 8 rares, 17 mythic rares including 5 versions of mythic rare Teferi)
- 1 Foil token
In a pack of a Core Set 2021 Collector Booster, you are always getting a minimum of four rares or mythic rares, and about 45% of the time, you will get five. Each pack will include 11 foils (plus the foil double-sided token) and 4 non-foil cards.