Hearthpwn

You can win guaranteed one of two ways, both require an empty deck:

1. Get opponent to 20 health or less, get yourself to 13 health or less, play Giant, banker to put giant back in deck, the wrath opponent's face for 20.
2. Get 2x wrath and 2x banker in hand, play Thaurissan to drop all 4 cards 1 cheaper, get yourself to 10 health or less, play lay Giant, banker to put giant back in deck, wrath opponent's face for 20, other banker to put giant back in deck, wrath opponent's face for another 20.

Tips:

Always Mulligan for Bankers. You don't want them coming out from Call to Arms.

Always keep a weapon for the end so that you can hit an enemy to lower your health enough for the Giant if necessary

Be super careful playing Call to Arms before turn 7 (and with a Brewmaster in hand) if you don't have both Bankers in hand. Doomsayer+Banker is game over in some games

You can often win with just 1 giant>banker>wrath if you get your opponent to 20, so don't fret if you lose one.

If you're close to losing and still have cards in your deck, try the combo any way. If you only need 1 hit, and have 2 cards left, that's still a 1/3 chance. I've won with 10 cards left before.

Card choices:

I've tried this deck many, many ways. Call to Arms is risky because of bankers, but its such a good deck thinner. Brewmasters are in for the save in case you pull a banker.