Why not drop earthquake for hurricane? It won't destroy any of your creatures and will still do the x damage to all players.
Permalink
Every time I've tried to use elvish piper it gets zapped immediately. I don't know if this is a problem for you, but you might want to consider giving it some kind of protection against lightning bolt or doom blade. I was thinking a whispersilk cloak? Once you have a darksteel colossus out you can move the cloak over for a quick 11 damage. Also there's a zendikar card, beasthunt, that belongs in this deck. I know it's not m10, but you want it.
There is also no way to block flying in this deck. And I think any type two green deck should have naturalize, in it's sideboard if not just in the main deck
why plains? lands don't have colors do they?