Hearthpwn

A deck without direct damage that tries to manipulate minions and steal the opponent's minions.

Steal a Battlecry minion with Shadow Madness and Youthful Brewmaster.

Convert an enemy minion with Shadow Madness and Recombobulator.

Resurrect an enemy minion with Shadow Madness by sending the stolen minion on a suicide attack with Kel'thuzad already in play.

Use Crazed Alchemist and Shrinkmeister to put enemy minions in range of Shadow Words, Shadow Madness, Big Game Hunter and Cabal Shadow Priests.

Don't be afraid to play spells and minions early.  No point waiting for tricks and combos if you're in trouble and need to react quicker.  There's no shame in playing a Mind Control Tech with less than four enemy minions.

A token Kezan Mystic because it fits the theme.  Only one Mind Control because it's so expensive.

Troggzor is yet another minion to drive your opponent crazy.  Against Mages and Rogues it can just outright win games for you.

No minion (unless you steal one) is within Big Game Hunter range.

No randomness from spells that frequently disappoint like Mind Vision, Resurrect and Thoughtsteal.

And of course it includes Sylvanas because she fits the deck so well.

I've reached Rank 5 with a variation of this deck where I then, admittedly, hit a brick wall.  Lots of fun to play though and some really entertaining wins.  Chromaggus has sometimes been a participant in the deck.