Hearthpwn

First off I feel that freeze shaman can have a place in the future as a popular deck type but it needs more cards to assist with it (I'm not good at costing so feel free to suggest costs and make the cards if you wish)

Spells: 

"Permafrost"  

Freeze all minions, add a Ice Shard to your hand. 

"Ice Shard" token card 

Deal 1 damage, deal double damage to a frozen target.

"Icicles"  

Add 3 Ice Shards to your hand.

"Ice Age" 

Cast Evolve and Devolve then freeze all minions.

"Frostbite" 

Deal 3 damage to a minion and freeze it, if already frozen give it +2/+2 instead. 

Weapons 

"Ice Dagger" 

Whenever you attack add a Ice Shard to your hand. 1/3

"Frozen Fist" 

This weapon is immune while one of your minions is frozen. (Doesn't lose durability) 5/1

"Hammer of Ice" 

Battlecry: Freeze your hero, you can attack while frozen. 3/4

Minions 

"Frozen Totem"

At the end of your turn freeze both heroes. Totem 0/4

"Blizzard Bringer" 

Battlecry: Freeze all enemy characters add a Ice Shard to your hand for each one frozen.

"Shattering Ice Totem" 

Whenever this takes damage add a Ice Shard to your hand. Totem 0/6

"Golem of Ice" 

Has +1 attack for each frozen character. Elemental 1/8 

"Misbehaving Ice Wisp" 

Battlecry: Freeze your hero. 6/6 (low mana cost) 

"Ice Wisp"

Battlecry: +1 Health for every friendly frozen character.

Hero Cards 

(Unsure on name) 

Battlecry: Friendly minions can now attack while Frozen. 6

Hero Power 

"Frozen Touch" 

Freeze a minion, add a Ice Shard to your hand.

Surprise: The 5th element

Similar to the artifact keyword of Rafaam this allows you to pick 1 of 3 treasures but the main difference is that the are lots of treasures that can show up these can be spells or weapons (minions are summoned via spells so they make sense). There are no class specific treasure aka class cards but there are cards that synergies well with some classes such as affecting armor or healing. There are a unlimited amount of treasures to find, all varying usefulness (so yes this is based on RNG but thats what i'm going for as looting chests in any game it is completely random what you will receive). To obtain a Treasure Chest you have to play minions, spells or weapons that give you a Treasure Chest in anyway such as these following cards:

Now for some example treasures:

Now for the challenge kind of thing, i'm curious to know what treasures you've found in your chests (basically your ideas for treasures) i cant wait to see what ideas appear and go nuts, Have fun adventuring! 

If you think Gorehowl is powerful....

A low cost but low health minion that can be a powerful presence if the requirements are met.

The Grunt Warlord

Zeddicus Grimsbane

He used to just be a minion in the Horde but after a brutal battle he was left wounded with many others. he banded them together and formed the Reckoning, a force made up of minions and grunts left behind. His goal is to end the wars and claim the land of azeroth for him and his minion brethren. 

His special Keyword is Overrun

So in other words as along as you have 1 more minion than your opponent it activates, it doesn't activate if you have a equal number so if the board is full nothing happens

This class is based around keeping your opponents board clear and yours full with benefits for keeping it that way, With lots of bonuses from adjacent minion based bonuses and having a couple wildcards aswell.

And finally the example cards

two ideas

1. 2v2 matches in both wild and standard take a look at fullas gaming video on it for ideas 

2. Community made updates comprised of expansions of user created cards

I hope this is considered sorry about the text slightly running over

If you are curious who this is he explains to the player in WoW about Y'Shaarj and the Klaxxi

http://i.imgur.com/wFdeuTS.png imgur link just incase of issues with attachment

Thank you for checking out my card i wish the best of luck to everyone else.

Interacts with Spell Damage and cards like Yogg-Saron, Hope's End, Mana Wyrm, Violet Teacher, Troggzor the Earthinator, Arcane Giant etc. etc.

Let's be honest, a lot of the cards in Servitors of the Loa are REALLY REALLY good. This card is even better if you can get one of the Loa through it and have it cost 0. The fact that the expansion has so many brilliant cards is what makes this card so strong.

Whoops wrong thread.

So, an idea for a future Quest (I do believe we will see more, and that Blizz will continue with the 2 class legendaries per Exp pack)

Basically, it rewards Mages for careful use of their Hero Power, by pinging down minions, the Hero power grows stronger, and therefore more capable of taking bigger minions down, or burning down the opposing Hero.

Frazzled Editor 100%. That is the most creative submission I've ever seen in these competitions

A very flexible card that can be played at any turn to fit in the curve smoothly especially on the turn before the turn you play the "If you played an Elemental last turn, ..." card like the Latest Shaman Legendary, Kalimos, Primal Lord.

"It was forbade from declaring as the fifth elemental because the Shaman scholars all agreed that (mainly Morgl the Oracle) 5 elementals is just too much to master. Mmmm mrrrggk."

Note#1: This card's Battlecry has two steps:
1. First, it consumes all of your remaining available mana;
2. Then, this minion is transform into a random Elemental that costs that much.

This means that you will summon the random Elemental with an extra mana cost of (1).
For e.g: If you play this minion at turn 9, this minion will transform into Ragnaros the Firelord or Anomalus.

Note#2: If you spend 10 or more mana (with The Coin or Innervate), you will only get the (currently) highest cost Elemental, Ozruk.

Possible Outcomes (A full List of the new-declared Elemental minion tribe):