Hearthpwn

This is a typical midrange deck in that it curves out very well and then has some serious punch between turns 6-8 where it allows you to play one of the best spells in the game: Call of the Wild. Highmane is a nightmare for every deck that cannot Entomb/Hex/Sap it, and so is Infested Wolf to a lesser degree. Forcing opponents to deal with your curve can often leave them shorthanded on turn 5 when you can play Ram Wrangler for value or Tundra Rhino and potentially have it stick, which is a devastating problem for anyone. N'Zoth is almost always a great play on 10 so long as you have gotten 2-3 of your deathrattle minions to die in the course of the early game.

Added Disclaimer: Flare is in the deck as a tech choice for some of my recent matches where it screws over freeze mages and concealed auctioneers. It is the first card to remove if you want to change anything, and my recommendation would be a second quickshot against fast decks, or a Princess Huhuran or Sylvanas against control.