New monster heroes and allies will be given brand new rule sets that make them unique and fun, providing lots of flexibility for deck builders and new game play experiences. Monster allies, for instance, have no restrictions based on the hero that the deck is built around, giving them added flexibility. On the flipside, a monster hero deck featuring only monsters gets some cool benefits as well. Monster heroes each have a permanent power on the back of their cards.
The murlocs run in packs, granting each other bonuses that the others possess. I immediately thought back to my Magic: The Gathering days with the Slivers and was instantly excited, since the Slivers were some of the coolest creations in TCG history. The murlocs sound like they are going to be a numerous force at all times, swarming your opponent and building up lots of cool bonuses.