This deck took me from rank 13 to rank 3 with 6 losses. No exaggeration. I literally did not lose a game until rank 7. The idea is to play aggressively and try to maximize face damage. Trade sparingly, unless you will die immediately you want to get that face damage in. Only trade when you expect a board clear or when you can protect a high value minion with a good trade up.
Your power cards are Zephrys and Brann, keep either in the Mulligan ALWAYS. Do not waste Zephrys on turn 2 unless you absolutely need the tempo. Brann + Kill Command is a great 10 mana play if you don't get Brann down turn 7. Leroy Jenkins has synergy with Unleash the Hounds.
Play Flark into your opponents board clears whenever possible for a quick activation.
Work in Hero Powers often if you can avoid loosing tempo.