It seems like you need a little more repeatable token generation. Doubling Season and Parallel Lives wouldn't hurt either. Shamanic Revelation is a nice card.

Good start so far! Small suggestions for you: always include AT LEAST 1 board wipe in any EDH deck, whether it be Damnation, Life's Finale, Blasphemous Act, Toxic Deluge, In Garruk's Wake. Plague Wind and/or Decree of Pain, having an out is always important. Secondly, as Prossh, you need more Grave Pact effects. Dictate of Erebos is the other one that you could use if you wanted to. Third, Doubling Season over Primal Vigor, Dragon Throne of Tarkir is not a good card by any stretch of the imagination (who's going to get that big? Prossh? If he's that big, why not just swing and attempt lethal?). Dragon Broodmother over Broodmate Dragon, Demonic Tutor, Vampiric Tutor, Worldly Tutor, Diabolic Tutor all should be able to do work, Elvish Skysweeper is too expensive, use something else for creature kill. Also, Artifact Mutation is a thing too.

Really, it's a great start, the deck just needs some small refinements and then it's good. I'd look into things like Bitterblossom as well for token production.

Good luck to you!

Ye could turn your lands into token creatures with guys like Nissa, Worldwaker and Skarrg Guildmage, then sac em to Ghoulcaller Gisa for more tokens. granted, Gisa can do that to every creature ye got, so it doesn't really HAVE to be land. maybe running something like Crucible of Worlds would pair nicely with this strategy. Lord forbid if ye have a spare copy of that lying around.but since you have Restore in the list it seems to make sense. recycling your lands to make tokens then just bring em back. sounds legit.

But of course this is just an idea i brewed up.

Vicious Shadows and Warstorm Surge can be huge game winners.

Cards like Chancellor of the Forge and Avenger of Zendikar can put out a lot of heat.

Also, you have green, so don't be afraid of ramp spells like Cultivate, Kodama's Reach, Explosive Vegetation, and Tempt with Discovery (for multiplayer at least).

Thanks for the input on this deck, looking like some good possibilities

Ogre Battledriver and Food Chain are pretty fun

I believe Fecundity came with the deck? I would add it back in. That card is nuts

I agree, Fecundity is insane.

Xenagos, God of Revels would be a bomb in this deck, as he doubles your commanders power and gives haste, he could swing for lethal commander damage the first turn he comes in.

Prossh comes in 5/5, with 6 tokens, sac them all pre combat so he is 11/5, beginning of combat trigger Xenagos, and Prossh swings in for 22/16, good night.

For added draw power try Sylvan Library.

I also second HeroInMyOwnMind's suggestion of Tempt with Discovery. At worst it's non-basic ramp for 4. At best it's a ton of non-basic ramp for 4.

Worldspine Wurm may be a cool add as well. He can be eaten for a ton of counters and poops out 3 5/5s when it happens.

Apologies; I won't flag these as suggestions because I tend to go overboard. I also didn't read every comment so I might repeat things a bit.

Some nonbasic land destruction; Prossh can slam into a proverbial wall against Maze of Ith or the like. If you play Tempt with Discovery some nonbasic destruction will balance out some Smart-Alec fetching Gaea's Cradle or what have you. Some examples are Ghost Quarter, Tectonic Edge- they can take a land slot so if you are disinclined to use them for land destruction, they can still provide utility. Targetted land destruction is also a decent political tool (you're less likely to annoy opponents who aren't aggro to you versus running Ruination); these also increase the potential value of Restore to the deck.

The value of mana rocks to green is less than other colors. Obelisk of Jund has several superior options (Commander's Sphere, Darksteel Ingot, I could go on). You might rather use a land tutor like Kodama's Reach or Cultivate- land destruction is less common than artifact destruction, you're less likely to be hit by Armageddon than Shatterstorm. I would also reconsider Armillary Sphere, which I feel is similar functionally but slower and more vulnerable.

I would just have to suggest that you try to obtain maximum value for your tokens. Also, note that with Prossh, you'll want to recast him for more tokens if possible so feel free to let him chump block for you. I would have to suggest Food Chain again (it's been suggested before), it's straight stupid. Immediate win most every time. Personally, I didn't like Ophiomancer in my Prossh build, he's a slow token producer initially and the tokens only gen if you don't control a snake.. most unfortunate. Also, land ramp spells are often better than your artifact rocks, especially Armillary Sphere. Trample is one of the best abilities to give to Prossh, making him huge isn't much of an issue most of the time but getting that damage through sometimes is. Good call on Rogue's Passage! Hmm, I could suggest more but I'd take up a bit of space, instead, check out my deck for ideas!

Tooth and Nail. tooth and nailing for Craterhoof Behemoth + Xenagos, God of Revels with prossh in play=win

Here are some of my suggestions:

more budget friendly(under $5):
Diabolic Tutor - tutors help your deck run more consistently
Wood Elves - lets you go get a shock land when you put them in your deck
Rootbound Crag, Dragonskull Summit, Woodland Cemetery - helps your mana base out
Kessig Wolf Run - giving prossh trample is always a good thing.
Helm of Possession - steal their creature, when done with it feed it to prossh
Deathrender - use it to sneak your higher casting cost creatures into play quicker
Squee, Goblin Nabob - only would suggest this, if you pick up Fauna Shaman as they play nice together Skirsdag High Priest - feed prosh, use this guy to make a 5/5 flyer...sounds "fair"
Eternal Witness - reusablitiy is good in EDH
Bloodline Keeper  ^Flip - makes flying tokens...check Ant Queen - makes a token for each 2 mana used...late game makes lots o' tokens
Dictate of Erebos - they sac a creature each time you feed prossh
Deathreap Ritual - feed prossh, draw a cards at end of turn
Rogue's Passage - lets you hit with prossh
Solemn Simulacrum - helps get land you need, and gets a card draw when you feed him to prossh.

Not really budget cards(between $5 and $10) Fauna Shaman - use her to get the creatures you need, fetch for squee, use squee to get 1 each turn
Sheoldred, Whispering One - you get to bring a creature back each turn, they sac a creature each turn
Tooth and Nail - fetch any 2 creatures and put them into play, y not
Maelstrom Pulse - best spot removal in these colorsLightning Greaves - giving prossh haste and making him not be targeted by opponents
Worldly Tutor - another good tutor
Asceticism - protects your creatures from spot removal, and can regenerate them
Garruk Relentless  ^Flip - makes tokens, and can tutor for creatures when flipped
Liliana Vess - can be used for creature tutor, with a possible upside

getting up there cards (10-25)
Master of the Wild Hunt - make tokens that can either feed prossh, or can be used to kill creatures
Dragon Broodmother - a flying token during everyone's turn, sure sign me up
Creakwood Liege - puts tokens into play, and gives prosh +2/+2 sure thing
Craterhoof Behemoth - lets make all creatures large
Demonic Tutor - good tutor
Volrath's Stronghold - lets you recover some key cards from board wipes
Parallel Lives - doubles token generation

expensive cards (over $25):
Doubling Season - doubles tokens and how many counters planeswalkers come in to play with
Badlands, Taiga, Bayou - help with mana base, but only get after the rest of the deck is playable and good

Phyrexian Altar is another combo with prossh.To go along with Food Chain

Blade of the Bloodchief is bonkers with Prossh. With either Primal Vigor or Doubling Season in play you can deal 41 points of damage in one hit.

Squee definitely doesn't have a place in Prossh.

I know it may sounds weird, but if you had more zombies in there (Ghoulcaller Gisa or something) Gravecrawler would be pretty nice as a sac outlet that can be sacced multiple times a turn!

Ok, so since you are running Fauna Shaman, why not trying Survival of the Fittest? Faster, but of course pricy. It could be interesting to see Brawn, Anger or Filth, as they are great with those 2 cards. You should also run Urborg, Tomb of Yawgmoth, which would help you fix your manabase, and it can even combo with Filth, to make all your creatures unblockable. Can be really nice if you have pumped creatures for them not to be blocked. Pretty nice deck, +1!

Ive got cavern of souls for this deck ...

Maybe something like Grave Pact or Dictate of Erebos?

Cut Kusari-Gama for Grave Pact. As cool as it is, Kusari-Gama really isn't a good card.