Very simple in concept- Keep the enemy numbers low with smaller spells and ol' Pudge till you have the mana to bring about mass destruction with Dragons, Legion and your big magics.

Update: It works! Can struggle against minion-lite decks such as BattleMage and Deathspeaker can take advantage of their dead minions, but can be very effective against an opponent who can't adjust mid-game against this playstyle.