Hearthpwn

100% winrate against Big Priest. If they play their "big" stuff, just hex or devolve it, use Zeph to get another hex. Use the 4 mana taunt to fill their board with useless 1 mana minions and then get a golden copy of it and do it again. Later in game, use Sylvanis, destroy it with the 2 mana spell to take control of a big thing and get another sylvanis. This is pretty foolproof against Big Priest, even won a game where my last cards were the Summoner, Sylvanis and Hex.

Not very great against anything else but it's super fun lol and if nothing else, when you use this deck, you'll suddenly stop facing big priests on ladder and get every other variant of Priest before big priest. It took me a 3 days before one day I got several big priests in a row and then won all of them easily.