Hearthpwn

This deck utilize the Hunter's Mark and On the Hunt to hunt your opponent down. In the current brawl, both players have many Unstable Portal cards, which give tempo, and these cheap Hunter cards can destroy that tempo of your opponent.

Card analysis:

Hunter's Mark: No matter what card your opponent choose or what they get from Unstable Portal, this card just turn it health to 1, ready to be killed by On the Hunt next turn (just hope that their minion don't have divine shield or deathrattle).

On the Hunt: Finish the work of Hunter's Mark, leave a 1-1 Mastiff on the board. This beast can be used to kill the next threat again with another Hunter's Mark or trigger the Kill Command.

Freezing Trap: Unstable Portal create tempo by using 2 mana and reducing 3. This card can negate these tempo by throwing the minion back to their hand, and add 2 mana into the cost. This almost mean destroy that minion because they won't be able to play it again (they should spend at least 2 mana for Unstable Portal every turn).

Kill Command: This can be used as a strong removal or a finisher. On the Hunt can trigger this card easily with only 1 mana.

Mulligan:

You should mulligan hard for Hunter's Mark (2 is better) and On the Hunt. The rest is easy, just hope to get good cards form your Unstable Portal.

Please give feedback if this deck brings you success. Please don't criticize if it doesn't, I just want to share :D