This is a working super budget, only common, no adventures (aka F2P) Mage deck.
Why does it work?
You have a LOT of minions in this deck and establish and maintain board control with the freeze mechanic of your minions. This also prevents the enemy from removing your enrage minions, which deal the majority of the damage.
You use the Explosive Sheeps for triggering multiple enrage creatures in one round or to clear the enemy board.
Me playing the deck: