Pick your favorite hero, rescue your friends, and win battles to defeat Thanos! Battleworld is a revolutionary cooperative, expandable, collectible adventure game featuring dozens of characters from all over the Marvel Universe! Players get to crack open the mysterious Thanostones during the course of play to reveal the mystery character inside for a constant sense of surpise and delight! 12 Battle Balls per box. Each Battle Ball provides fully-playable introduction to Battleworld in a collectible size! Each Battle Ball includes: - 5 battle cards - 2 Micro Collectable Heroes one is still trapped in Thanostone, - 2 hero cards and everything you need to play!