Hearthpwn

Asking for advice from you lovely people!
This might sound a little weird what with me making the deck and all, but I'm new to deckmaking so i'd really appreciate it if everyone could comment what changes they'd make to the deck to suit them/make it better. That way I can see what different things to try out, so I can see which works the most, and to make it the best and most consistent deck that I can.
That being said, I still have no idea whether or not this'll work out at all, as I have yet to try it out and do the testing to make it work, but I definitely want to give it my best shot.
Anyways, thanks for reading!

EDIT: After some testing I've swapped some cards, It's late in Europe so I'll post my reasoning tomorrow. The deck needs a LOT more testing to see what cardlist produces the highest winrate.

The idea behind this deck is to implement the beautiful lady Chillmaw into Freeze Mage. It providing a large taunt with massive AoE damage makes it suitable for sustain. Of course, in order to make this reliable, some cards had to be replaced, namely 1x Explosive Sheep, Flamestrike, and Archmage Antonidas. However, they have been substituted for 2x Azure Drake and Chillmaw.

The ideal scenario is being able to trigger Chillmaw's effect of Alexstrasza, being able to hold off enemy attacks with taunt, deal with larger minions, or wipe the board with AoE. However, to create consistency, I included Azure Drakes as they match the Freeze Mage theme of Spell power and card draw. A last resort is to play mind games with your opponent. If you play her before Alexstrasza, knowing that you're playing freeze mage your opponent may assume you have Alex in your hand and make inefficient trades. Likewise, in a dire situation where you have to play her after Alexstrasza, they may assume you have no dragons in hand and trigger the deathrattle by mistake.

Win Conditions:
( ">" Means next turn. "Cardname" means that minion dies before your next turn. "[Cardname]" means this is the essential move, with the rest up to the cards in your hand)
Alexstrasza > [Attack] + Hero Power / Pyroblast / Fireball / 2x Frost Bolt / x2 Ice Lance 
Alexstrasza > 2x Fireball + Frost Bolt /  2x Frost bolt + 2x Ice lance + Hero Power.

If you have Alexstraza and they heal or gain armour, hopefully you are still able to attack and kill them. If not, don't be afraid to play any minions and start going for their face. Chillmaw will be very useful in this situation.

Removals from standard Freeze Mage:
1x Explosive Sheep can be dropped due to the need for card draw to make this deck consistent. Try your best to mulligan for a Sheep, however.
Flamestrike isn't neccessary in all freeze mages, and Chillmaw is able to provide large AoE damage, along with taunt, and a big body should it survive.
Archmage Antonidas is a tricky one, but the inclusion of extra spell damage and larger bodies capable of hitting the face made me feel a straight up pyroblast would be most effective.

Substitutions:
Acolyte of Pain ===> Malygos
Thanks to FunKaliTy for the suggestion, if TGT slows down the game enough, swapping out an E.S. for Malygos could be useful, and provide an alternate win condition.
Acolyte of Pain ===> Explosive Sheep 
Again, explosive sheep could be substituted depending on what you run into. If you find early removal is needed more than card draw, don't hesitate to swap them out.
Pyroblast ===> Archmage Antonidas
Depending on your playstyle, you might want Antonidas instead of the pyroblast to hurl fireballs at the opponent's face and get another big minion on the board.
Bloodmage Thalnos ===> Loot Hoarder
If you don't have Thalnos in your collection you can swap him out for a Loot Hoarder, it achieves the same card draw effect, and has one more attack for taking out early minions.

I'm no expert and have only come close to legend, I just want to try out this deck, and wanted to see what other people thought. It'll need a lot of testing and tweaking, but I have some hope for this deck.