Defenders of the Realm: Global Effects
The Global Effects promo are a set of cards that are shuffled into the Darkness Spreads deck at the beginning of the game. As they are revealed, they will have various effects on the game, with 5 of the effects being good effects and 5 being bad.
There are currently a total of 28 unique Global Effects cards, 14 good and 14 bad. The promo packs contain 10, 5 good and 5 bad that are completely randomized.
You are able to combine Global Effects from the expansions/promos however you would like, affording a great variety from game to game.
Note: All sets are completely random.
For more information: http://boardgamegeek.com/boardgameexpansion/102582/defenders-realm-global-effects-cards