I am new to magic, but I would up elemental mastery and twilight drover, along with the sorcery cards up to 4, and drop a few of the other creature cards to make room to generate more cheap tokens, and also up the chance for the combo. The bauble seems superfluous to me. Maybe something to return sorcery to your hand like anarchist and maybe a couple of elixer of immortality to recycle if need be.
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http://www.mtgvault.com/mozex/decks/modern-goblin-horde/
What about adding Guttersnipe, Bloodmark Mentor and/or Akki Coalflinger as other options for first strike and direct damage?
Thanks, I missed that one.