The box contains 468 cards, which astute readers will notice is the same number of cards included in the original board game!
One of the expansion’s biggest additions is that each class receives 10 new powers and 10 new talents. The new class cards flesh out the characters’ strengths and compensate for some of their previous weaknesses, not to mention adding a ton of flexibility and replay value to each class. Some of the powers are not combat-related, but are just as powerful and add variety for players that are looking for interesting new tricks.
For more information, including rules translations, visit BoardGameGeek.