Could be good, right?! But how?

Here's my prototype, feel free to comment, and I will keep updating as the deck builds and morphs into a 60 card land hating monstrosity! http://deckbox.org/sets/458603

In casual, most definitely. And I love the idea btw.

Edit: My only worry is the mana cost difference. But I say go for it.

I don't know if I would include Borborygmos Enraged, but the land idea can be fun:

Mox Diamond
Seismic Assault
Land's Edge
Land Tax
Countryside Crusher
Life from the Loam
Crucible of World
Oracle of Mul Daya
Horn of Greed
Lotus Cobra
other landfall creatures
etc.

The problem with Borborygmos is that he doesn't offer anything unique. You should already be executing well on your plan and have things to do with your land, so an 8 mana creature that doesn't end the game immediately is suspect. That doesn't mean to leave him out entirely, but I would be hesitant to include all four copies, even in a casual deck. Probably two copies would be fine.