DC Comics Deck Building Game: Crossover Pack #1 Justice Society of America
Product Review (submitted on October 27, 2015):
This little expansion helps the base game by the addition of new heroes and villains. Lets be honest, you can only play as the core heroes so many times before you get bored. The villains are fun and add a little twist to the game. The very few "main deck" cards only come up few and far between in the stack. If you have the base game or one of the bigger boxes, it is worth it.