Hearthpwn

redid

Priests usually take a beat from rush decks, this is for control priest stall the game and don't die at turn 5. So basically it costs (1) less when you are below 10 health, if you have 3 life points, it costs 3 mana.

Mage has flamestrike, blizzard, ice-block and ice barrier to come back, combined with natural cards, plenty if you ask me. I will make this when I get back to my comp, very straight forward:

Legendary druid spell

10 mana

Silence all minions and destroy them

Hope you like it :D

It's quite self explainatory, effect is simmiliar to Kel'Thuzad so I had to buff it a bit to make it worth 10 mana. 

My Druid spell

Edit-

You can play the "Rooted!" for 10 mana, but it will do nothing (Just remove the other effects).

Edit2-

Rooted! updated

The measure of a main tank's worth is not the shine of his blade, but the dents in his shield.

You shall not pass.

Better way to get Illidan in a demon deck?

Evocation refills your hand with random Mage spells, which provides lots of unique experience. You can get weaker spells to cast on the same turn or more powerful ones for burst damage on the next turn. Rare outcomes of Frostbolt + 4 Ice Lances or 5 different secrets are also possible. Moreover, the secrets you get from Evocation are random, so the opponent will never know which one you've cast, whereas now it can be deduced from your deck type and meta.

Your opponent pretty much skips his turn.

Ignite (collectable)

Combustion (not-collectable)

Other idea (I know I can post only one entry but hey, just for fun):

Rogue Spell, 10 Mana

Name: Renew

Text: Discard you hand and draw the same number of cards. The next card you play cost (0)

''Fear not, m' Beauty, n'd mark me words. Those bilge rats will ave the smart lick-o-th-cat across stern a'foer sundown. Ahrrr''                              (Captain Greenskin to Valeera at the Battle of Booty Bay). Art by Peter Lee.

Good synergy with all the 1 cost Pirates and Deadly Poison + Dread Corsair.  

(edit 3. Sry about this, but couldn't ignore great advice from iSinti on adding Stealth.) (Edit 4. reduced number of ship's cannon by 1 Read about changes in discussion) Now, That's it. Great fun. 

For some Dragon synergy. Seems pretty powerful, but is fairly situational. If you manage to keep a dragon alive on your board, you'll get 2 dragons for 10 mana. Will you pack your deck with cheaper dragons to increase the effect, or will you pack larger dragons for high value summons?

My submission

An enrage/damage themed warrior spell.  Has interesting synergy with warrior cards, and while it's true that it can combo quite powerfully with Whirlwind I think the combo of 4+ minions on board + Last Stand + Whirlwind is prohibitive enough, and the enrage requirement to actually get the buff limiting enough, to be balanced.  Heck, may even need a buff to be viable in come-from-behind positions.  Certainly no worse than the druid combo.  Heck, may even need a buff to be viable in come-from-behind positions.  Anyway, thanks for looking!