Just some details:
Take out the Giant Growths and Thunderbolts. They kinda suck.
Replace with Chain Lightning, Hammer of Bogardan, and 3 off color Moxes. Throw in Sol Ring somewhere. Painlands are good too.
Creatures: First, a word on our old friend Ernie Djinn. The day of the Erhnam has passed. As WOTC realized that green sucked, they gave it better big creatures. Look at Emporer Crocodile or Weatherseed Treefolk. For this deck, in my opinion, the creature is Blastoderm. I think Avalanche Riders would be better than Argothian Wurm. Thresher Beast might also be a possibility.
So here's my deck:
4 Blastoderm
4 Avalanche Riders
4 Stone Rain
4 Ice Storm
4 Pillage
4 Lightning Bolt
4 Chain Lightning
2 Seal of Fire
2 Hammer of Bogardan
5 Mox
1 Black Lotus
1 Sol Ring
4 Taiga
4 Brushland
4 Forest
5 Mountain
I think if you wanted to change the deck around alot you could make it signifigantly better, but who really cares...
-Daniel
"The Durango-95 purred away real horrorshow - a nice,
warm vibraty feeling all through your guttiwuts. Soon
it was trees and dark, my Brothers, with real country dark.
We fillied around for a while with other travellers of the
night, playing hogs of the road. Then we headed west,
what we were after now was the old surprise visit, that
was a real kick and good for laughs and lashings of the
old ulta violent."
-Stanley Kubrik,
A Clockwork Orange