Monsters fight in an arena while you sit in the stands, secretly wagering on who survives the final round. Each turn you play a combat card to change a monster's strength value or activate a special ability from a faction. At the end of a round, the monster with the lowest total is eliminated, along with any bets placed on it. The strategy involves misleading your friends into thinking you support a creature, only to kill it off with a hidden card. The artwork on the cards is dark, but the text is tiny and hard to read under low light.