four enemies are dealt onto another player board, face down, and you face off against them one at a time. the monster attacking the first troop in your player board, figuring out damage, and then repeating as need be until that monster is killed or until the monster has killed all of your troops. then, if you have no troops left, any monsters left end up doing damage to the base. but having these unknown monsters means that you have to guess when you might want a stronger troop, because you might not want them right at the front. or you have to decide, do you want to use an 