Now that the mainboard has been completed, looking to build sideboard, any recommendations are appreciated!

Varolz, the Scar-Striped or Jarad, Golgari Lich Lord look like pretty decent additions, since you'll get a lot of non-recurring creatures in your graveyard.

As for sideboard.. a few useful cards would be stuff like Creeping Corrosion for shutting down artifact decks, Melira, Sylvok Outcast against infect, Gnaw to the Bone, Feed the Clan or Thragtusk are good against other aggro decks and burn, Scavenging Ooze or Relic of Progenitus against other graveyard decks, Vines of Vastwood against control, something like Duress or Inquisition of Kozilek against combo decks.

Hope that helps. :3

Thanks BenMonte, I did think about adding Varolz, the Scar-Striped in for the cheap scavenging the smallers creatures would offer, then went ahead with Adaptive Automaton instead for the +1/+1 boost, will play test and see how well that works. Jarad, Golgari Lich Lord is a little pricey in CMC, though will keep him in mind.

I already have 4 Duress in my mainboard instead of the pricier cards like Thoughtseize or Inquisition of Kozilek. As for the other cards, my collection is limited so I will have to search for the other suggestions, you gave me great ideas though, thank you!

Updated many cards in the deck, took out Evolving Wilds for Ghost Quarter, Urborg, Tomb of Yawgmoth, 2 Swamps, took out Adaptive Automatons for Cemetery Reapers, replaced Pain Seers for Cryptbreakers, and altered the sorceries and instances. Also updated the sideboard.

Huge update! Lowered the land count and added six fetch lands such as Windswept Heath, Bloodstained Mire, and Polluted Delta. Added Scavenging Oozes and switched couple of removal spells for Dismembers

I'm not sure Varolz is worth it in this deck; though you have cheap creatures, none of them have high power for their cost; remember that the benefit of scavenge depends on the target card's printed power only. Imagine using Death's Shadow with Varolz to get an idea of how scavenge can REALLY work. Still, I would think about cutting him out of this particular deck.

If you want to run Diregraf Colossus I'd mainboard it with 3 or 4 copies. If you run a decent number of zombies, it's extremely strong, even when all your stuff is dead in the yard. Try swapping out the Geralf's Messenger for the colossus and play a couple games; see how it feels. You might like it better, especially since the cost isn't as prohibitive on your color base.

I wouldn't recommend the off-color fetchlands--if you're not running white for example, then Windswept Heath is just a really expensive forest that costs 1 life and drastically increases the total price of your decklist. Deck-thinning IS nice, but you're not running any major lifegain besides Scavenging Ooze, so that life cost will put you down to dangerous totals very quickly for very minimal gain, especially with how few basic lands you're running. Remember, cracking a fetchland AND playing a dual land in the same turn will cost you 3 life. That's a free lightning bolt for your foe every time you do this.

Running so few basics also leaves you vulnerable to certain mill strategies that don't stop milling until they hit a basic land, or can't be used against basic lands; your current list risks losing your entire mana base to a single spell.

Overall, you're on the path to creating a very persistent zombie deck; there's just some cards that work at cross-purposes and can actually slow the deck down. Try a few swaps from your maybeboard and see what feels more effective.

Thanks for the feedback Daynen! The biggest reason why I'm using such off color fetch lands is because of how cheaper they were for me to acquire over say Verdant Catacombs...I admit the fetches I do have are for thinning the deck out and grabbing a shock land, though I do see how that can hurt me say later in game. If you are recommending more basics, what should I take out for more basics? Honestly, I have not seen any milling in my play area to fit the description of what you wrote.

For starters, just the off-color fetches themselves--the ones that fetch basic lands you simply aren't running. The point of a fetchland is to fetch one of two lands you need. The logic is this: if it's only fetching you a swamp, then wouldn't you rather have just drawn a swamp instead? Food for thought. Also bear in mind that if you're running Urborg, Tomb of Yawgmoth, then every land will be a swamp and thus be essentially a dual land anyway. I wouldn't bank on this correcting your mana by itself unless you're running a set of them, though.

I'm assuming that, at times, you use the ghost quarter to sac your own fetchland and get a basic without the life cost, but if you are, I wouldn't advise this, since, just as with urborg, it'd be just as good to draw a basic land to begin with. In fact, if you DO manage to get more urborg (just to increase your odds of drawing one, mind you) you could get away with very few nonbasics and few swamps, since non-swamps will then also produce black mana.

As for what you see in your area--no mill decks? Lucky you. I'd still try not to make yourself TOO vulnerable to it though; otherwise, the first mill deck that shows up might mill you out on turn 3 or something ridiculous like that. It's the most terrible feeling in the worl. Trust me; I know first hand.

Updated.

Updated: removed the Geralf's Messengers for Prized Amalgams.

Chameleon Colossus and Nameless Inversion are some of the best Zombies ever printed. Mutavault as well.

Phyrexian Crusader and Stillmoon Cavalier allow you to attack from another angle if you need something like that.

Haakon and Lord of the Undead allow a value plan vs midrange and control.

How about Glaring Spotlight instead of Heroic Intervention?

Thank you for the suggestion Apple. Glaring Spotlight on paper looks good, and it's cmc is only 1 making it look appealing. The 3 mana cost to activate the ability however seems a little costly, and after paying the 1 cmc would make it 4 mana costing in total. Not to mention, there is a ton of artifact hate in Modern I think that would get rid of Glaring Spotlight before I could pop it.

You're probably right I was just thinking spotlight had more situational uses then Heroic Intervention which basically only offers protection from wraths and cheap removal. Spotlight offers protection from cheap removal, Bogles hate, and allows your zombies to Alpha Strike in the late game when 2/2s can't get past much.

Anyway how has this deck been performing?

Yes, I definitely see where youre coming from. Another difference that I did not take into consideration is that the Heroic Intervention does protect against board wipes where as Spotlight does not, at the cost of 1 less mana. Dealing with a deck like Bogles is where the sideboard would come into play. More than enough cheap enchantment destruction and hand disruption.

I ran a similar deck that was a little slower using a playset of Cryptbreakers and a playset of Geralf's Messengers, and it ran adequately. I even beat Jund midrange in the final round of the modern tournament, so to me that says something about the potential of this deck.

Perhaps some mainboard hand disruption?

I used to run a playset of IOKs in the mainboard, however, they seemed to slow the deck down and the deck already tends to be slow early play. Thank you for the suggestion though, if I ever want to construct and play my Jund zombie deck again, I'll def have the IOKs back in.

1-2x Driven / Despair