Also check out my elf deck and any advice you have would be appreciated http://www.mtgvault.com/ViewDeck.aspx?DeckID=293936
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It needs some card draw. I would suggest glimpse of nature, but if you're trying not to put alot of money into it they're probably not a good call at 15 a piece.
More spot removal less oblivion rings it'll combo better with snapcaster too
Use "expedition maps" to get all of urza's lands more consistently