Good updates. Llanowar Elves and Elvish Pioneers should help getting your mana expensive creatures into play. Only thing is, in order to use followed Footsteps, you NEED to have a Flooded Grove, since there are no Islands in the deck, so if luck isn't on your side when you play, you'll be unable to use this enchantment. To ensure an efficient mana pool, I would recommend using - Evolution Charm. Use it to get the lands you need precisely. (http://www.mtgvault.com/ViewCard.aspx?CardName=Evolution Charm&Edition=PLC) - Savannah. Very useful, since they procur both land types you need. (http://www.mtgvault.com/ViewCard_Popup.aspx?CardName=Savannah&Edition=2ED&Print=1) - Sunpetal Grove. Interesting, because you almost always have a Plain or a Forest in play. (http://www.mtgvault.com/ViewCard.aspx?CardName=Sunpetal Grove&Edition=M10)
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This deck has potential. The main weakness I can see is that you'll be pretty much vulnerable the first few turns, due to the lack of low casting cost creatures and mana sources. If you can manage to survive the first few turns without losing too much life, then the rampage mode goes on :D