I originally dismissed Dark Iron Corruptor as being too expensive (when you factor the extra 2 mana to remove the Cursed! card) but you also have to factor in that the opponent also has to lose that mana or suffer the same fate). If you are playing a Reno or Handlock deck you may actually want to be taking extra damage per round as it gets you to your molten giants that much more quickly!Merchant would be great if you can play it on turn 1 and you don't have the coin but how often will that happen? Most of the time you will probably end up wtih a pretty worthless 1 drop in your deck. Could be worth the gamble, particularly for Rogue, but I'm not sure it would be consistent enough to be called broken.Eranikus certainly seems risky. Could work in a Silence deck, though (I'm just playing with a Silence Priest right now which is proving great fun!).I like Zon'Ozz I think it could encourage all sorts of clever combos and ideas for decks around it.
Merchant could use something, maybe...Battlecry: If your opponent has The Coin take it and give them Store CreditStore Credithttp://imgur.com/GKgkj2PAnything but the banana.
Warlord has an interesting mechanic, and might work, but currently is way too OP. Eranikus is cool (imagine double innervating him out on turn 1), but he's a green dragon, not a red dragon.Flip the table is the best card in the game and needs to be made immediately.
Merchant? Wait, we have and who also drop The Coin..
Actually the picture for Eranikus is accurate, its from one of the comics but I believe he's in the swamp of sorrows or some similar place with bizarre red lighting.