Hearthpwn

I feel like this card is going to excel in Renolock and Mechathun decks as a way to counteract aggro in the early to mid game.  Overall I think it's going to be a lot stronger then people initially think and I look forward to using it in my slower warlock lists. 

Not hitting face can be an upside if you're using it as a board clear, which can make a pretty big difference.

Example: You play Spreading Madness with 2 minions on the board. On average, half the shots will hit either player in the face, resulting in only about 4-5 damage against minions. If you play this card with 6 other cards in hand (not very difficult for Handlock), you're already getting more meaningful damage in this scenario. Of course, as the board gets wider, Spreading Madness will be more likely to hit minions and thus give more value compared to this card, but any stray shots hitting face can either make or break the result. Then again, Hellfire also exists for big boards.

TL:DR It's better than the "garbage rare" for clearing, especially on small boards.