Avengers Assemble! And there came a day unlike any other, when Earth's Mightiest Heroes were united against a common threat! On that day The Avengers were born - to fight foes that no single hero could withstand! Join the Avengers and battle against the Masters of Evil, or fight for victory as the Squadron Supreme. Bring Justice like Lightning with the Thunderbolts, or rewrite history as Kang the Conqueror, Master of Space and Time! The most powerful Marvel characters can now be found in the Vs. System, the most popular Super Hero TCG ever! 14 cards per pack.