I also made this deck so that it would be cheap as fuck ;D
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No Tectonic Edge?
I would probably cut down a few vampires and then add a few more burn spells. I've played it out vs some of the stronger agro decks with cowblade and quest + 0 drops and it loses most of the times simple due to drawing too many creatures and too little control(which you need to your opponent. maybe this? -1 pulse tracker +1 lightning bolt -1 gatekeeper of malakir + 1 arc trail At least for a start