From the back of the box:
"Warball is a revolutionary and original trading card game that pits players against each other in fierce head-to-head competition using weapons previously unknown to man.
Warball combines an exciting fantasy backstory with a mosaic of ominous characters, and opportunity to conquer lands, and the challenge of fighting an intense war. In addition, the appeal of collecting spectacularly illustrated cards and the unique element of firing Warballs against ruthless opponents tests a player's manual dexterity and sharpshooter skills.
What makes this game different from all other trading card games is the collectible, 'empowered' Warballs embedded with highly detailed figures and stylized icons ready to wage battle in tandem with the cards."