Keep the demons coming on your Warlock with Voidcaller, the latest Curse of Naxxramas card revealed! Also check out the Mage card Duplicate if you haven't seen it!
A real focus on demons is something missing from the major Warlock archetypes in the current meta, and it looks like Team 5 is trying to encourage getting back to that. Do you think this could help bring about more demon-centric decks?
And here's a list of all the cards revealed so far: Tip: Click the image to view a larger version where you can page between them all!