Alright, I did a little test after some games and put every piece of ramp/fetch/land support card in one pile. I was actually surprised at just how ridiculous it was. I also realized I could use a little more balance on my removal, card draw, recursion. So, with that, I made the following updates:

Cards Out Chord of Calling , Greater Good , Grow from the Ashes , Hickory Woodlot , Memorial to Unity , Mulch , Undergrowth Champion .

Cards in Beast Within , Finale of Devastation , Ghalta, Primal Hunger , Pattern of Rebirth , Seasons Past , Triumph of the Hordes , Whirlwind .

Comments welcome, of course.

Hey there!

I really like your current list, for a start, especially City of Solitude. It was played against me once, and I hated it so much, that I actually liked it (after the game was over, of course).

To replace Paradox Engine, I suggest that you add in some more landfall effects such as Architect of the Untamed (although it might be too slow with the wrong hand), or Retreat to Kazandu (which I think is better, it gives you choices and can pump up Multani).

I also think that you should replace Gaea's Herald with Prowling Serpopard. For just one extra mana, you get a bigger body, and the snake itself can't get countered.

You could also try Crash of Rhino Beetles, but I don't really know what to replace for it.

I wish you and this deck luck (especially City of Solitude)

Thanks for the feedback, Hexaflexagon. Both City of Solitude and Dosan the Falling Leaf have won me games. The cards are often underestimated and my opponent doesn't deal with them on their own turn and soon enough I've got Multani, Yavimaya's Avatar out and Craterhoof Behemoth dropping in or just playing Triumph of the Hordes and the game is over. The deck definitely surprises people.

Great card suggestions. I really like subbing in Prowling Serpopard. Architect of the Untamed might be dead weight too often. One of those, everything has to go right to really get the value from it. Retreat to Kazandu is something to consider. It brings the curve down, but I wouldn't mind replacing Paradox Engine with another more impactful five drop.