doctorhydrogen

First and foremost; Kaalia is a noob trap. A commander that lets me play huge, OP versions of the three most popular iconics in the game? I want all the Kaalias! But the reality is any smart group will realize in about four seconds that the deck just dies with Kaalia off the field, or better yet pinned to the board with something like Darksteel Mutation being useless. It's not even really an issue of hardcore competitive vs. not, because even the people running janky pirate tribal can shut her down by shuffling half a dozen thirty cent cards into their deck.

All that said:

Homeward Path. Get one in here ASAP. You don't want to be staring at pretty much any of those creatures swinging back at you.

Less dudes, more draw. You can only cheat one guy into play a turn, and you probably won't be hardcasting more than that either. Plus you risk overextending into a board wipe with too many guys down simultaneously. You need gas in hand so every swing with Kaalia puts something down though, or gives you answers. Phyrexian Arena and Necropotence are good starts, and I'd probably also find room for Ambition's Cost, Ancient Craving, and probably NIght's Whisper, Sign in Blood and Read the Bones, too.

Cards I'd run over Murder, Unmake, Victim of Night and Annihilate: Terminate, Mortify, Path to Exile, Go for the Throat, Utter End, Hero's Downfall, Anguished Unmaking, Chaos Warp.

You need more ways to protect Kaalia. Righteous War saves her from 95% of the targeted removal spells in the game, and helps a lot of your other dudes, too. Lightning Greaves protect her and let her swing out the turn she comes down.

You have Necroskitter in twice.

30 dudes is probably too many in a deck not cheating stuff into play. It's asking to overextend into a board wipe imo.

There's almost no downside to running Urborg, Tomb of Yawgmoth, and plenty of upside, plus it makes Cabal Coffers (which you probably should have) that much better.

This looks like a deck that will run out of gas, fast. You need more draw imo.

IMO 38 dudes is too many in a deck that isn't built around cheating things into play, etc. You're just asking to overextend into a board wipe or not have enough answers to problems.

Harsh Mercy and Mass Calcify are both going to do good work here without hurting you a bit.

If you've got a handful of drakes out Gravitational Shift just ends games.

I've been happy with Mitiotic Manipulation in Talrand so far. Ramp a land and a drake for 3 isn't a bad deal.

Chaos Warp. It's your only way to deal with enchantments. I mean, it's a great removal spell in general since it hits anything, but the fact that it's your only way to hit enchantments is priceless.

Terminate > Doom Blade.

Since you have the option to pitch a lot of stuff to Olivia, plus sacc outlets, I'd think Living Death would work really well here.

Urborg, Tomb of Yawgmoth is worth running for the fixing.

Dissipate is strictly better than Cancel. I'd just run the original Counterspell there though.

I'd run Righteous War. It's gonna make your commander immune to 95% of immune spells and it'll help a ton of your other dudes.

Journey to Nowhere lets them recast their commander since it's an exile, where as Darksteel Mutation sticks to the board being worthless. Plus all your dudes flying so you don't have to worry about the indestructible guy blocking.

I'd pull Ghostly Prison for it. You've got 900 board wipes; if people are able to build an army large enough that you need Ghostly Prison to stop if you've got bigger problems with the deck :)

I'd pull Ghostly Prison for it. You've got 900 board wipes; if people are able to build an army large enough that you need Ghostly Prison to stop if you've got bigger problems with the deck :)

Splendid Reclamation will go in once I get one, hopefully this weekend.

As for stuff you're missing:

Dragonmaster Outcast isn't landfall necessarily, but he does deal with lands, and he's good value as a one-drop.

Rubblehulk cast via bloodrush is a win-con all unto itself late game. Again, not landfall, but land-adjacent.

Boundless Realms can end games with something like a Baloth Woodcrasher in play. So can Scapeshift, but it's like $40 where as Boundless Realms is like two bucks.

From the Ashes can get a ton of triggers in a turn, too, and I generally don't feel bad about playing it as people can replace the lands it blows up assuming they're not super greedy and running no basics.

Oh, and Fastbond is banned in Commander.

http://tappedout.net/mtg-decks/mina-and-denn-wildborn-landfalling-rocks/

I feel like black doesn't add that much to justify the extra complex land base, etc. required to support it. You're only running 12% black cards, and of those they're not really back-breakers. I run Mena and Denn for my landfall general, but new Omnath would work. I just don't think black is adding much here, unless you really want it for fun.

Who is your commander?

31 lands is way too few in a 3-color deck. I'd be hesitant to run that many in a mono-red goblin deck with a cmc average of 2. Here it's suicide. I'd find room to get up to at least 36, preferably 38.

Mortify and Putrefy do everything Murder does plus more at the same CMC. Utter End costs just 1 more, can hit anything, and exiles on top of it. I'd run any of those over Murder.

Deglamer or Unravel the Aether > Naturalize. There's nothing worse than holding a Naturalize and looking at Darksteel whatever or a Blightsteel Colossus or a Theros God or a Wurmcoil Engine that's gonna split in two, or a deck with at on of graveyard recursion. 99.9% of the time shuffling with a Deglamer at the same CMC is better than destroying.

I'd run Skyshroud Claim over Explosive Vegetation. The lands don't come into play tapped with Claim, and it can get Tropical Island (and shocks and Battle-lands if that's your jam).

I guess it depends on the meta, but the card draw on Slice in Twain isn't close to worth it over Deglamer or Unravel the Aether. They're two mana less to cast, but the real important thing is it really sucks holding a Slice in Twain when you're staring at a Purphoros and 20 tokens about to come into play, or a Blighsteel Colossus about to run your day, or a Darksteel Forge about to go over, or a Blighsteel Colossus you don't want to split, or someone with graveyard recursion who is just gonna get the artifact or enchantment back.

Not sure it's necessarily worth running, but Dismiss into Dream turns Kaseto's ability into a kill spell that even destroys indestructible dudes.

Hall of Gemstone is pretty solid in monogreen. It keeps your stuff from being countered and locks down non-mono spells from being cast, including generals.

Shamanic Revelation is probably going to be an excellent draw spell here, even though you won't get much from the ferocious trigger.

Sylvan Safekeeper should should be the one-drop you fetch to keep Yisan safe.

I liked Gyre Sage as a two-drop because he produces a lot of mana fast.

Seedborn Muse was my go-to five drop as she lets you start using Yisan on everyone's turn.

Soul of New Phyrexia was my six-drop. At that point the game is over; it's just nobody knows it yet. You're using Yisan on everyone's turn, and your board is indestructible.

Avenger of Zendikar which you have is the seven-drop, and while you're searching you can cast Panglacial Wurm with the mana off Gyre Sage.

Drop Craterhoof Behemoth as your eight-drop and kill seven people simultaneously and everyone stops being your friend.

ARTIFACTS-

Howling Mine: Unless you're punishing people for drawing (Nekusar) or running hugs (Pendelgriff) then Howling Mine is pretty bad. For starters, you're the last one to draw. There's been so many times I've seen someone play a Mine, have everyone draw, then see it get disenchanted before the guy who played it got a card. Beyond that though, you're not just drawing one card and your opponent is drawing one; you're drawing one and your opponent is drawing 3 (or 4, or 5, depending on game size). You have to kill them all eventually, which means you're helping multiple enemies for each single time you help yourself. I'd run Phyrexian Arena here, or Necropotence. Well, that's a lie. I wouldn't run one or the other because I'd run both :)

I do like Nevinyrral's Disk in mono-black as it's one of your few ways to hit artifacts and enchantments, but it hits your stuff, too. It's a personal preference call.

ENCHANTMENTS-

Recurring Nightmare is banned. I'd put Necropotence or Phyrexian Arena in this slot, whichever you didn't put in the Howling Mine slot.

INSTANTS-

Unmake wouldn't be legal here. I know you can cast it, but because it has the hybrid white symbol in the casting cost it's technically only allowed in decks running white. I'd replace it with Hero's Downfall or Go for the Throat.

Dark Ritual is a great card that might even be underrated in EDH, but it's also a card that really only works with specific decks where you're looking to outrace people. I don't think this is that deck. I personally would rather have a mana rock I can use every turn like Mind Stone if you want to ramp, or even Wayfarer's Bauble that lets you ramp out a free swamp.

Skeletal Scrying is card I'm always on the fence about. Instant speed is great since you can make sure you don't need the mana for a removal spell then cast it right before your turn starts. However Damnable Pact only costs one more black to cast, doesn't exile graveyard stuff you might need, and best of all can be a kill spell. I've had a mana doubler or two out and cast Damnable Pact on an opponent for 30 before. It doesn't happen often, but it happens. I'm not sure I think Pact is better necessarily, but I think it's worth considering given that it seems like you don't want to remove stuff from your graveyard.

LANDS-

You've got a couple of mana doublers in Crypt Ghast and Magus of the Coffers and Cabal Coffers, all of which are super powerful, but you're running a ton of non-swamps that will make your doublers weaker. Plus the non-swamp lands really aren't that great. Things I'd cut:

Barren Moor: Cyclers are really only a thing you should run if you're desperate for draw (mono-white, mono-red, boros), or if you have a way to abuse them (The Gitrog Monster, Titania Priest of Argoth, decks running Crucible of World/Life from the Loam shenanigans). IMO it's not worth the tempo hit.

Bottomless Vault: Just too slow, and doesn't work with doublers.

Crystal Vein: Same as Vault

Everglades: Really only good with multiple lands you wanna bounce, and really the only one you care about here is Bojuka Bog. Not worth the tempo hit.

Evolving Wilds: You don't need color fixing, and the deck thinning isn't mathematically relevant (http://magic.tcgplayer.com/db/print.asp?ID=3096).

Leechridden Swamp: It does count as a swamp, but I'm still not sure it's worth coming into play tapped.

Terramorphic Expanse: Same as Evolving Wilds

Warped Landscape: You don't need the fixing, and it's not a swamp.

Things I'd add:

Myriad Landscape: Ramps into two swamps. It's essentially the same tempo hit as Everglades but it doubles up with mana doublers when cracked.

Thespian's Stage: Worst case you copy a swamp. Best case you copy Cabal Coffers (it's not Legendary).

25 lands isn't close to enough, even in a mono-deck. I'd up it to at least 35.

You have two copies of Fog and Dicatate of Karametra.

Unless you're running some kind of Primal Surge deck or something 44 creatures is way too many. You're just going to overextend into a board wipe and be stuck with an empty hand. You could cut down to 26-28 easily and still be running the most creature heavy deck at most tables.

Get some draw or you're gonna run out of gas. Harmonize and Regal Force would be a good start, as would Soul's Majesty.

Removal. Someone drops a Doubling Season and starts pooping out tokens it's GG. Get at least a couple of artifact/enchantment removal options, and a few ways to deal with dudes (Song of the Dryads and Lignify are great since they keep the general from being recast).

Do counterspells annoy you? Hall of Gemstone shuts off blue during your turn without hurting you a bit. Plus good luck casting that multi-colored general, everyone else who isn't me.

Nykthos, Shrine to Nyx is going to be tappable for 10+ mana pretty often in this deck.

Emerald Medallion would save a ton of mana.

For one mana more than Glory of Warfare you can run Dictate of Heliod and give all your guys +2/+2 all the time, plus you can flash it in as a combat trick. I don't love either card to be honest, but I'd run Dicate over Glory.

For one mana more than Berserker's Onslaught you can run True Conviction to give your guys double strike all the time AND lifelink.

Personally I'd run Deglamer or Unravel the Aether over Naturalize. Nothing feels worse than holding a Naturalize in hand when someone flops a Blighsteel Colossus or has a Darksteel Plate on something you want dead or has a Theros god in play ruining your day. Plus stuff is harder to get back from the library than it is in the yard. I've seen plenty of Eternal Witness drops to bring back that Doubling Season someone just destroyed, but to get it from the library buried is much less common. You could also just flat-out exile it with Fate Forgotten, but that costs one more mana.