Ixalan/Booster Battle Packs
Each sample deck contains basic lands, commons, 4 uncommons and 1 rare. Besides the Welcome Deck 2017 cards the decks also contain cards from Kaladesh, Aether Revolt and Amonkhet. They do not contain cards from Hour of Devastation or Ixalan.
The Ixalan Booster Battle Packs are not available at Wizards Play Network stores, but only at large "big-box" stores like Walmart or Target.