Hearthpwn

So, as you can see, this deck is Freeze Mage. I'm not sure this deck can work really good, but just give a try! I just reached rank 20 from rank 14 with 7/3 win streak. I don't know I'm lucky but I have something to explain.

1) Keep your Frost Nova and Doomsayer for late game (If you have 2 Doomsayer or Ice Block instead of Duplicate, it's fine.).

2) Don't use Arcane Intellect in turn 3. It will cause really bad for late game, because usually this deck ran out of card at late game, but if you combo, doesn't really matter.

3) Because of 1 Flamestrike, 2 Blizzard can get you out from really trickly situation, so think again when you are using Blizzard.

4) When you get secret at first card draw, don't remind it and remove it. Mad scientist can really helpful, because of secret.

5) Actually, there is many card that can clear Shade of Naxxramas, so if it's at 3/3, don't think about stealth and just hit minion or face.

6) There is less drop for 5~7+ drop, so keep 3 drops and 7+ drop for late game.

7) Belcher or Haunted Creeper is actually not really helpful for Freeze Mage, (Well, it's helpful for turn 2, though) so you can remove Belcher to Ice Block and Haunted Creeper to 1 Doomsayer and Bloodmage Thalnos

8) Reason why I didn't put Bloodmage in this deck is that since Bloodmage is 1/1, there is many way to clear Bloodmage if you are Druid, Mage or Rogue. But if you want early card draw, it's fine.