Mana is like money and pretty much everything in this game costs a certain amount of mana to use
Here is what that means in practice: Most boxes return 2,450-3,000 in card value from guaranteed pulls your SR and AR quality determine the floor 1 in 6 boxes hits a SAR, instantly adding 3,500-28,000 depending on which one you pull The best-case scenario Lillies Clefairy ex SAR returns over 3x the box cost from a single card The guaranteed AR slot is worth watching in this set specifically
You can also sacrifice noncreature tokens, like Blood, Treasure, or Clues
Additional combat steps lets you spin the wheel more times, so enter: Seize the Day, Relentless Assault, World at War and crew
Standard Japanese booster boxes commonly contain 30 packs, with many packs holding 5 cards, while English booster boxes usually contain 36 packs