I would drop
Wild Slash as you're never going to trigger the Ferocious ability on it which in my opinion is the only reason it's even an uncommon. There are much better 2 drops that deal 2 or more damage.
Impact Tremors is a fun little enchant you can combo with
Dragon Fodder or
Hordeling Outburst (if you choose to add that in) I also really like
Lightning Berserker. It does a TON of early game work from cheap. I've pinged an opponent down 6 health in the 3 turns off a really poor mana heavy draw. Another card I'd examine is Eidolon of Great Revel. If I was playing against you I'm wiping that off the board ASAP. And as you've only got 2 it feels like wasted space. Perhaps a sideboard card for when you know for sure you're opponent has no removal then come in 2nd game swinging with it. Just my two cents. I really like what you're running from the set though. Should work out well.