Get ready for the all new Core 2020 Set! Looks for all new planeswalkers, abilities, legendary cards, and more! Theme Boosters help new and casual expand their collection with colors that theyâ€™re already invested in! All new Core Set 2020 themed boosters packs are like jumbo packs: each pack has 35 cards including 1 guaranteed rare or mythic card!! Each Theme Booster box has 10 packs, each pack has 35 cards.