h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

An evening of frenzied deck altering later, here's what I got:

Main deck

11 Swamp
12 Mountain

4 Firebolt
4 Stone Rain
2 Malevolent Awakening
4 Terminate
1 Charcoal Diamond
1 Fire Diamond

4 Nightscape Familiar
4 Mesmeric Fiend
2 Barbarian Outcast
4 Petravark
4 Flametongue Kavu
1 Tahngarth, Talruum Hero
1 Chainer, Dementia Master
1 Petradon


Sideboard

1 Demolish
2 Earth Rift
1 Haunting Echoes
4 Flame Burst
2 Star Compass
2 Emblazoned Golem
3 Faceless Butcher


Again, not much changed. I'd like to change the 12th mountain for a Charcoal Diamond or a Fire Diamond because:
a) Petravark can't remove it
b) Desolation Angel can't destroy it
c) I can play more than one a turn, and this deck needs to be destroying enemy lands quickly
As I said earlier, Tahngarth should shred enemy Nightmares. I was thinking of removing Chainer because of my deck's anti-land focus. But yesterday he resurrected a Vampire Dragon and thus re-earned his place in my deck.
I've used the new modifications in a couple of games, and it seems to work fine. Of course, I've only changed one non-land main deck card so I shouldn't have expected major changes in performance. The sideboard Flame Bursts were intended to be used against enemy Nightmares in place of the Mesmeric Fiends, but I tend not to bother. Could Flame Burst remove Vampiric Dragon?

Be seeing you.