Hearthpwn

Quick Overview:

Tried to come up with a gimmick/strat that has not been posted in the deck submissions yet. Stealth minions are harder to kill than normal and the idea here is to mass them up, still utilizing them when necessary, and casting Shadow Word: Pain or Mind Control or Shadow Madness  or Mass Dispel to get rid of taunt defense or instead gain more offense the turn you go in for the kill.

Strategy and Match ups:

Early game:

Without Ancient Watcher and a low cost silence in your starting hand or draws, your goal is likely to be on the defensive. Utilize Holy Smite, Shadow Word: Pain and your cards that silence to stave off early aggression and strong minion effects. Use low cost stealth minions as needed to kill targets or hit an open opponent if its a clear board. If you are lucky enough to have Ironbeak Owl or Silence with Ancient Watcher then go on the offensive, else leave Ancient Watcher out on the field for later use.

Midgame:

This is where match ups come into play. The more AOE your opponent is capable of, or ways of getting your minions out of stealth, the more you are going to throw yourselves at them instead of saving up. Scare them into using AOE on your creatures when you start hitting them with what you have, using Shadow Madness whenever you have it to deal additional damage.

Against decks that lack consistent AOE output, use this time to mass stealth minions on the board, even if it means you take some damage.

Lategame:

Because Stealth minions can not be targeted, a good amount of ability cards can't have been used to prevent you from saving some of these creatures for an opportune strike. At this point your opponent should have been whittled down by Mind Blast, Ancient Watcher, and other low cost minions.  Mind Control or Shadow Madness + Mass Dispel with stealth minions can result in a lot of damage in a single turn. 

Silence remains strong throughout the game, letting you deal with otherwise troublesome lategame drops, and you have 3 cards that let you silence!  Mind Control can keep you a relevant threat but should be used as a finisher.

This deck is not meant to be an all in strat. Use stealth minions to deal with strong creature abilities when you don't have silence around. Instead of saving them, use them to pressure your opponent when they use cards like Thoughtsteal or Shadowform early which leave the opponent with no board presence.

Edit: added Leper Gnome over Shieldbearer for more aggression and (likely)( guaranteed damage to your opponent before you pop your stealth.