During play, Base cards (each with their own difficulties and abilities) are in play. You attempt to have the most power on the Base from your minions when the Base is smashed. Sounds easy? How easy is it when an opponent's Alien-Ninja decides to Beam Up your minions to other Bases - flat out Assassinate them? What about when the Pirate-Dinosaur player Full Sails in and releases King Rex to stomp your minions into the ground, or when the Wizard-Zombies use their Mystic Power to create an Outbreak, suddenly flooding minions onto the Base from the discard pile? Or what if you faced a Zombie-Dinosaur player instead and he created an Outbreak of massive beasts all at once?!?