War of the Spark - Theme Booster Display BoxRules Text Contains: Theme Boosters help new and casual expand their collection with colors that theyre already invested in. This listing includes 1 factory sealed Theme Booster Display Box. Theme boosters are different than normal boosters: Each Theme Booster contains 35 cards, including 1 Rare or Mythic Rare. Some packs even contain a foil card! One color per pack! Build a deck on demand for the way you like to play Magic. Set: War of the Spark