Thanks Sigmafie! Yeah...the second I saw those elves I was like "oh my God...someone at WOTC love Combo Elves! They had to know what both cards would do with Cloudstone Curio (as they both have perfect ETB effects and powerful effects for their cost.)

metalemmanuel - Yeah...Genesis Wave is probably the most powerful green non-permanent spell every printed. In a deck like this (that creates TONS of mana but all of the cards are low-CMC AND there are numerous infinite combos) you really can't get much better of a "card advantage spell" than Wave. Even at X=4 it is unreal.

I could see cards like Asceticism being strong when the meta is heavily attrition/removal based (i.e. when Jund, Junk, Jeskai, Grixis, etc. thriving). I'll tell you a card I would play over those that was just spoiled...Evolutionary Leap. It allows you to respond to board wipes and/or removal by sacking a creature only to turn around and draw another. I'm high on that card in Elf boards.

Other mono-green options for the board that I've used in the past include:

Beast Within, Essence Warden, Choke, Scavenging Ooze, Leyline of Vitality, Cavern of Souls, Spellskite], Eternal Witness, Evolutionary Leap, Primal Command, Seal of Primordium, Reclamation Sage, Pithing Needle (or Phyrexian Revoker), Root Maze, Plow Under, Leyline of Lifeforce, Loaming Shaman

These should pretty much cover any and all potential decks you could run up against. Once you know what decks are your worst match ups and how many of each are in the meta you play in; you will easily be able to build a board from the above.

For decks with a lot of removal, I would suggest Eternal Witness and Evolutionary Leap. These are great ways to get value out of their removal. Against burn, I like both Leyline of Vitality and Primal Command (which also has good graveyard hate, tutor-ability, AND can bounce lands). Spellskite is a good catch for Twin, Infect, and Boggles. Beast Within is the perfect "catch all" removal for any match up (including Tron as it can hit lands...). You can certainly get away with a mono-green sideboard.

Thank you so much.. Already having a green deck (mono green stompy) and a lot of these ideas are wonderful.. I didn't even think about Beast Within for tron, twin,etc.. Shame Spellskite is out of my budget

i find this build very helpful in my own list. i am constructing an elf combo deck of my own that i think you will find very interestinghttp://tappedout.net/mtg-decks/ug-intruder-elves/

have you considered Beck / Call? it might be able to take the place of some of your land enchantments.

Beck / Call would be a better fit in the "all elves" version....but it seems VERY interesting with Dwynen's Elite (2 draws for one card!)