The Prerelease format lets players first construct and then compete with a 40-card deck, setting aside four Prize cards at the start of play. It's a great way to get in some quick games with family or friends and to begin developing strategies ahead of the expansion's general release. Each Build & Battle Box includes a 40-card ready-to-play deck featuring key cards from current and prior sets and features one of four unique foil promo cards. It also contains four Pokémon TCG: Sword & Shield—Brilliant Stars booster packs and a deck-building tip sheet.
The Pokemon TCG Sword & Shield: Brilliant Stars Build & Battle Box includes:
- Four packs of Sword & Shield – Brilliant Stars in the kit
- A deck-building kit known as an "evolution pack" which includes one of four possible stamped holographic SWSH Black Star Promo and enough cards to battle using just the kit.
- The box, which functions as a deck box.