Hearthpwn

This is probably my favorite Druid deck of all time!

You save your Spare Parts as much as possible, of course you use them if they are needed to clear board, but don't waste them if you don't need to play them because you want to use them with Gazlowe for nearly unlimited late game draw and they help you keep a large hand size for when you draw your Mountain Giant.

Often you get so many Spare Parts that you can deal with almost any board state as long as you have some board presence and your opponent will curse his mother for everytime you play that perfect Spare Part to wreck his board :P