Hearthpwn

This deck is created to have fun, not to win (although you can win with this deck, having A LOT of fun in process). I had a lot of success with deck from rank 20 to rank 19 in just a couple of hours!

Every card here except Arcane Intellect and Reno Jackson has some randomnes. Be it Discover mechanics on it, or cool deathrattle with unpredictable effect, or just crazy random damage across the board. And on the top of it stands Yogg-Saron, the god of randomness.

If you don't have some card, don't worry, just replace it with another card that has randomness on it (search by word "random" in your collection).

Game plan

Control the board, stall the game, drop your big threats, play for value, win the game. HAVE FUN!

Use Mad Bomber and Madder Bomber as AoE tools. Use Flamecannon and Bomb Lobber as single target removals. Use Tinkmaster Overspark as hard removals. Use Ethereal Conjurer to discover useful spell. Use Babbling Book and Cabalist's Tome instead of card draw, thus you will win fatigue matchups. Play Yogg if things got outta control.

Mulligan

Preferable cards that you want to have in your starting hand: Arcane Missiles (against Zoo or paladins), Babbling Book, Flamecannon, Jeweled Scarab, Mad Bomber (against Zoo or Paladins), Unstable Portal, Forgotten Torch. Kezan Mystic is very good against hunters and mages, consider keeping it in starting hand.