Unleash the power of the titans with the Attack on Titan: Battle for Humanity Challenger Series This Challenger Series includes ready-to-play decks designed for new and veteran players. Each 62-card deck features the iconic characters Eren Yeager and Armin Arlert, offering two unique play styles. Experience UniVersus' first double-sided character card with Eren Yeager, who can transform into the ferocious Attack Titan for devastating assaults, while Armin’s careful planning and methodical strategy guide you to victory in this cruel, new world.