This set include all 5 different prerelease packs, each one representing a different clan in Tarkir: Dragonstorm.
 
Each Tarkir: Dragonstorm prerelease kit contains:
5 Tarkir: Dragonstorm Play Booster Packs
1 Tarkir: Dragonstorm Seeded Booster with 14 clan-aligned cards
 A random FOIL Rare or Mythic Prerelease promo card, drawn from any rare or mythic in the set with a foil year stamp
A Spindown Life Counter