So, I've had 4 goes in arena so far, one was a warrior which went 3-3 with gorehowl, 3 Kor'kron elites, insane cards. Another was a mage deck with 3 flamestrikes, pyroblast which went 6-3, but I just did my 3rd as Druid (first one with druid i went 1-3 with a pretty good deck) and i went 9-2!
The deck SUCKED too compared to the other ones i've made, it was full of shitty low attack cards and one ironbark, demolisher won me two...I just don't know wtf happened, the other decks were way way better.