Ben 10 Sumo Slammer Battle Set 1: Heatblast, Ripjaws, Upgrade, XLR8, Greymatter, Vilgax Sumo Slammer Battle Cards- original humorous artwork Collect and trade cards - or use the cards to challenge your friends to a Menko card battle The blister pack doubles as a dojo arena. Place your figures in the arena and challenge your friends, last Sumo standing is the winner