Kemba, Kha Enduring Meow
Each Collector Booster will have the following contents: Collector Booster Info 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
Discontinued : Officially stated it wont be restockedmaking scarcity a huge driver of value
You can also easily abuse Lotus Field alongside Crucible of Worlds and friends
Its Brainstorm ability lets you draw three cards and then put two from your hand back on top of your deck
