put in some Elvish Pipers or Summoning Traps so you can get those big guys out on the field for free.
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you could also put in a traumatize which does the same thing as Drowner of Secrets.
the voracious dragon could possibly end the game just by using its devour. good stuff.
holy shit. that relentless rats is a fucking crazy card! this is crazy deck! +1 all the way!!
the fires of yavimaya is good card if you can play it early in the game.
beastman01
i agree with kranoz. brave the elements would go well with iona's effect.