I'm surprised you're not running Cavern of Souls either main or side. 26 cards in your deck are human creature spells, which means you can use it for quite a bit of your deck. You get around countering, AND you can use it for either color. If you have a problem with a lot of mass creature kills, you might want to look at Angel of Glory's Rise as well. Not only does it stomp zombie decks on its own, it also gets around Mutilate by bringing back all of your creatures at the same time, which means big champions fast.
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You have counterspell listed twice. Since you do, I would suggest you add another alternate win condition to your deck by dropping the second one for Laboratory Maniac.
With the large variety of creature types you have, descendant's path is a very dangerous card to run in your deck. Because if the card isn't a creature that matches a creature type you have in play, it sets the card to the bottom of your library. I would either opt out of it, or find something else that would help you more. Possibly Fervor or Urabrask the hidden for haste on your side.
Coat of Arms can be dangerous, you might want to switch over to Door of Destinies.
Given that a variant of this deck that was Mono-green managed to place 5th out of 26 decks, beating several delver decks, it could probably use just a little bit of tweaking to make it amazing. Plus this listing isn't bad for 70 bucks.
Normally I would agree that it's absolutely terrible, but I managed to stall a werewolf deck with that card.
If you're going to run that much deathtouch, I'd probably drop the mortarpods for Wolfhunter's quivers instead. Same effect, but you only have to pay to equip it once. Slap it on a Diregraf Captain, and give him something to do. I'd also like to know what the Phantasmal Images are going to copy. They'd be pretty fragile without either hexproof or shroud.
Why not just use donate to give them a plains?
Where's Carinval of Souls at? Whenever a creature comes into play, lose 1 life and add (B) to your mana pool. That's pretty terrible.
Wood Elemental is pretty terrible. It's a 0/0 if the forest that's sacrificed isn't untapped. If you read the oracle text it doesn't get any better. As it comes into play sacrifice any number of untapped forests. Wood elemental's power and toughness are equal to the number of untapped forests you sacrificed as it came into play. As terrible as it is, I've seen someone build a deck around that card, magical hack, Urborg, and orcish squatters. It was pretty silly.
You're probably right about the Memnarch, seeing as how I don't have too many ways of putting out enough blue mana to make it worthwhile, but the Blightsteel is pretty easy to cast after I get a mycosynth golem out. Giving all of my artifact creatures affinity for artifacts is pretty amusing.