Fortune cards are sold in random booster packs and give players of any class some additional benefits during game-play. The first two sets were Shadow Over Nentir Vale and Neverwinter, with Fury of the Feywild scheduled for November 2011 and Spiral of Tharizdun for early 2012. Each set consists of 80 cards made up of rare, uncommon and common cards, plus a few promo cards.
From the Publisher:
Fortune Cards are a new D&D gameplay enhancement that showcase the chaotic and unpredictable nature of adventuring in a fantastic world of danger and magic. Every time players begin an encounter, they draw cards from their decks of Fortune Cards, activating the game benefit at the appropriate time. Each card provides a game effect that enhances attacks, defenses, or provides some other sort of benefit to a player character. For example, a card might provide some temporary damage resistance, a bonus on your next attack roll if you charge, or give you a reroll when a certain condition is triggered.