EDH Attempt One

Please feel free to constructively comment.

i dont know which banlist you are using, but in our (i thinks it is german ban list) is primeval titan banned. :(

but you can add green and black ordeals, and maybe gift of the deity. i think if you wanna kill with commander damage, you need fasten you deck, but it looks realy nice.

Add some manaramp, as farseek, harrow etc... and a few destroy all spells, like damnation.

and try skullclamp. its a bit combo with gravecrawler :) 3mana = draw 2 cards :)

I'll focus my advice on +-counters, so here goes...

Incremental growth s plain awesomeness, because you get a whopping 6 counters to put on 3 different creatures. Also Thrive and Solidarity of Heroes. And if you really want to et those counters rain, I suggest adding Corpsejack Menace, cuz it doubles the +-counters placed on your beefs when he's on the table. Death's Presence is a good enchantment, but it mostly benefits you whenever your creature dies(not a problem with your color combination, though) and Hardened Scales, too.

Then there's the new Bolster-ability, of course...

34 mana is really lean, even in a deck with a 2 mana commander. I personally wouldn't run less than 36 even in a mono deck.

Rogue's Passage is great in Skullbriar, and I'd recommend maybe one more sacc outlet like High Market, because you want to be able to kill Skullbriar in response to a Black Sun's Zenith or Toxic Deluge.

Greater good is amazing in Skullbriar. My friend who runs it sometimes saccs Skullbriar when he's big just to draw the cards then recast him.

You're already running Sylvan library so I'd strongly consider Abundance. It's fine on it's own, but with Sylvan Library it lets you draw all three cards. I'd run it over Oversold Cemetery easily.

IMO unless you're running Green Sun's Zenith for a turn 1 GSZ for zero to fetch Dryad Arbor you're just asking to loose a land for no reason the second someone board wipes.

Hex is just too hard to make work. There are too many times you don't have six targets to hit, or you want to hit more than six, plus it won't hit hexproof of shroud dudes. Plus six mana seems like a lot when you could just run Plague Wind or in Garruk's Wake for 9, or my personal favorite Decree of Pain for 8.

There's almost no situations where Murder costing 1 mana more than Hero's Demise cost me the game, but I can imagine a whole ton of situations where I'd be more than willing to pay one more mana on Hero's Demise to hit anything. In other words, I'd run Murder all day long over Demise.