Hearthpwn

Deck overall

The same old and beloved (or not) Freeze Mage. The strategy is simple in general. Retard your opponent as much as you can until you filter your deck to get what is really important. 

Win Condition

This Freeze Mage has a versitile way to win the game. You can either freeze the board while burning your opponent's face. Or you can just retard the game until you get the a great amount of burn in your hand plus Evolved Kobold and then play Emperor Thaurissan to reduce its cost and throw everything up at once into your opponent. Another way to win is using Alexstraza and finalize your opponent with the burn you have left.

Deck Strategies

Overall

Always try to keep as much burn as you can. Filter your deck as fast as you can, and be careful to not overdraw important cards such as Emperor Thaurissan, Alexstraza, and others. Don't be afraid to use Bloodmage Thalnos to cycle your deck, but it can be helpful to increase your burn in the late game as well. Manage your health inteligently, control the board as much as you can, and when you see you can't do it anymore, use your burn and try to kill your opponent before he kills you. Keep in mind that you don't need to discount all your burn with Emperor Thaurissan. It's not necessary, unless you really need to give all the 30 damage at once.

Aggro/Midrange

Against Aggro/Midrange decks, try to burn your opponent while you deal with the board with AoE and freeze effects. Try to slow them down in the beggining of the game using Doomsayer and your cheap minions (Arcanologist, Mad Scientist, and others).

Control

Control decks can usually gain a lot of health, so you rarely will go all in. Try to bait them with some burn to make them spend their health gain and then play Alexstraza to get back in the game. Sometimes you can make them fell comfortable with their health giving some damage with hero power or your minions, and then finalize with Evolved Kobold + 2 Frostbolts and 2 Ice Lances, dealing an amount of 22 damage for 10 mana. The Pyroblast is in the deck to give that extra damage after your opponent spent all of his health gains and you don't have any burn left.

Mulligan

Always search for your low cost cycle cards such as Arcanologist, Mad Scientist, Bloodmage Thalnos. Against slower decks, you can either keep Arcane Intellect or Acolyte of Pain (careful against priest). Forgotten Torch is also a good keep as early game removal.

Substituitions

If you're facing too much Aggro, you can replace Pyroblast for Volcanic Potion, in order to help in the early game. Ice Barrier can also be easily replaced for another Forgotten Torch if you're struggling in the early game (it also gives more extra damage in late game). Primordial Gliph is not really necessary, it's easily replaceable as well.

That's my first contribuition to the community, hope you enjoy it. I'm open for any guide about the deck or anything. Thanks!