Mage
This deck have plenty of resourses and is specially good against Druid. Cards like Devolving Missiles and Conjurer's Calling are super effective to counter buffed minions, specially low cost buffed minions like Lake Thresher Teacher’s Pet Twilight Runner.
The freezing arsenal cards like Brain Freeze Ray of Frost Frost Nova can buy you a lot of time vs aggro or to avoid damage from big minions until you draw or discover something helpfull or simply while you buff Mozaki, Master Duelist.
Thanks to Cram Session and Arcane Intellect you will draw your deck fast. But with Evocation and Mana Cyclone you will have a lot of extra resources so dont be afraid.
In this type of decks with discover cards like Magic Trick and Wand Thief you have to try to adapt to the situation but if you dont know what to pick freeze or damage are always good options.
Mana Giant is also very good and you can combo with Conjurer's Calling.