Each deck set includes 1 ready-to-play deck of 100 Magic cards (3 Traditional Foil cards, 97 nonfoil cards), a 2-card Collector Booster Sample Pack (contains 1 Traditional Foil or nonfoil alt-border card of rarity Rare or higher and 1 Traditional Foil Uncommon card), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 Life Wheel, 1 strategy insert, and 1 reference card
Then when you want to play a different deck, simply take out every card that has a Red or Boros border to divide the sections once more
A lot of them are 3 mana and in my experience, getting stuck on two lands with a bunch of 3 mana rocks in hand feels super bad
Look at Force of Will with 318 pristine copies already
Conclusion Fourth Edition was Revised with 50 cards removed and 122 cards added
Take Grindstone, for example