Druid - Juicy Psychmelon As much as I love Flobbidinous Floop for many reasons, the Disco Melon is everything you could want and more. As much as it's going to ruin Wild (let's be realistic, it will, and it'll cause a resurgence of Aggro decks), it enables a lot of fantastic decks to help wrap games up, and it'll queue Dirty Rat left and right. Why do I like it so much? Mecha'thun combos, that's why. Wanna know why the card doesn't draw a 6 mana minion? Hemet, Jungle Hunter. Count your blessings.
Hunter - Flark's Boom-Zooka To be capable of dumping minions in the graveyard or populate your board with tokens just feels so good. If you can get your Deathrattles to trigger twice the turn you play FBZ, you are almost guaranteed a victory. Let's not forget all the Poisonous minions you could summon with this. This card really is something special.
Priest - Cloning Device This card is capable of giving you so much information about a specific part of your opponent's game plan, what's there not to love? Information is really important to have on hand during each turn, this feels like a staple inclusion. This card is also really good with Psychic Scream, and could be a lot of fun with Weasel Tunneler. Something to think about.
Warlock - Demonic Project As obnoxious as this card will be alongside Gnomeferatu, we need more disruption BECAUSE of Druid. No other class is as scary these days, and I don't feel like enough was produced to help fight the ever growing Druid threat. I feel it necessary to include this card, regardless of everything else Warlock was given.
Shaman - Electra Stormsurge Holy mama, what a card. Shaman can double its Battlecries, Deathrattles with Baron Rivendare and can double its Spells now? This card has so many applications, I don't even know where to begin.
BIGGEST DISAPPOINTMENT - Harbinger Celestia No one gives a single fuck about a Neutral Mirror Entity. BTFO, you horseshit thot. So bad. It can work, but I'm pretty sure spending 4 mana on a Fire Fly doesn't sound good, and in the case you get lucky and get a big minion, your opponent is either bad, stupid, or has a plan. You've done hardly a thing for yourself by showing your opponent you're playing Mirror Entity, and I pity anyone that pulls this card in a pack. Sooooooooooooooo bad. Shame on you, Blizzard. You've squandered an awfully good opportunity here, and wasted beautiful art on some smart ass idea that everyone is laughing at right now.