Hearthpwn

Overview:

I came up with the idea of this deck after playing a similar one in a Paladin arena. Despite most of the cards being neutral Elemental minions, the decks works surprisingly well and is very flexible. 

Another good positive to this deck is that it doesn't rely on the latest Adventure Expansions, so players who don't have them can also play with this deck.

Play Style:

This deck involves keeping control of the board with minions, getting a lot of Elemental minions in hand, and then buffing them when appropriate to add lots of stat value to them. Many of these cards are also viable in most stages of the game and are very flexible against many types of decks.

Card Overviews:

Smuggler's Run

This card is great for combos with Fire Fly, Igneous Elemental, and Servant of Kalimos as it adds a lot more value to the minions in your hand. This is especially important considering that this deck relies a lot on minions to be successful. 

However, if necessary you can play this in the early game if you need quick control of the board (with cards like Tar Creeper).

Grimestreet Outfitter

Just like Smuggler's Run, great for buffing minions in your hand to add extra value to them; especially since this deck relies a lot on your minions. 

Hydrologist

I found this card to be a surprising must-have in this deck as it adds to the flexibility of the deck. Yes, Paladin secrets are not as effective as Hunter or Mage secrets, but having the option to choose the right secret to be in your hand at the right time can be a game-changer.

For example, I would have easily lost against aggressive decks if I didn't play this and get a Noble Sacrifice, or a Repentance against Taunt Warrior or Handlock; even an Eye for an Eye in the late game against a Mage with low health and a Fireball.

Acolyte of Pain

I added this card because this deck desperately needs card draw and with a buff it makes this card that much more viable to play.

Lay on Hands

I chose this card over Forbidden Healing or Solemn Vigil not only because (again) this deck needs card draw, but you need to focus more on getting control over the board with your minions over anything else. Playing cards like Forbidden Healing which use up a lot of Mana or Solemn Vigil which relies on you sacrificing your own minions to be valuable (which is a last resort for this deck) is out of the question.

Combos To Keep In Mind:

Equality + Consecration

Equality + Blazecaller or Fire Plume Phoenix

Fire Fly and Igneous Elemental Deathrattle + Smuggler's Run and/or Grimestreet Outfitter