I like it. +1. I'll make a Gruul version as well. It is a bit over $20 though.

You have to spend 20 to get to 30. So I'm not lying! :-D

With your ramp, why not blast out Jundily and do Soul of Shandalar instead of Soul of New Phyrexia ?

New Phyrexia's Indestructible protects against board wipes... TWICE! :-D Though don't get me wrong, he will be in the deck. I just need to get one.

I don't think you run enough lands to fully utilize Courser of Kruphix . He's an amazing card, but you are only running 22 lands. I'm not sure how many you're going to top deck with him out without adding more lands to make him more consistent. I personally feel like Hornet Nest is more of a sideboard card to bring in vs aggor decks. While I love Rakdos, Lord of Riots I think his RRBB cost is a bit color intensive for a 3 color deck. Even with Caryatids and Mana Confluence. He's easily fetched off of Hydra or Chord, but beyond that I think he's a little too difficult to hard cast with your mana base in 3 colors. Polukranos is so mean I think he should be main boarded. Just some thoughts.

How about Courser of Kruphix ? Nice deck. : )

Thanks for the compliment. Courser is actually a little too slow for this deck. Yes he filters out dead draws, but with only 22 lands you'll generally be staring at a creature as the Courser eats a Hero's Downfall to the face. He'd be more useful if I ran 24 lands... the way I'd play him would be drop down 1 Mystic, drop down 1 Hornet Nest, drop down 1 Stormbreath Dragon, and then put in 3 Coursers.

Strike that. I'd drop a Mystic, a Nest, and a Scooze.

I've been fiddling with a similar build to not much success. Still, I think

1. Scavenging Ooze is too good to not run in this deck as a 1-of. It's an X=2 chord target good at any stage of the game. You run 24 creatures. Do the math.

2. I would turn one of your Desecration Demon or Stormbreath Dragon into a Master of the Feast . His drawback is harsh, but an aggresive X=3 chord target would look good here, and it's better than the other options.
   

3. Since you don't care about black devotion, I think Sign in Blood or Read the Bones works better than Underworld Connections . You need to activate it three times (spending a total of six mana, and happening no earlier than turn 5, rarely before turn 6) to approach better value. If you need a long-game value engine, you'd be better off with a Whip of Erebos or another planeswalker. You aren't a control deck or MBD.

4. I'd try to get Mizzium Mortars in the sideboard. It plays real well with Xenagos.

5. I don't like Gruul Ragebeast or the other souls in the sideboard. Shandalar is arguably mainboard material, Innistrad isn't very good, and Zendikar is alright but you have better options in Jund. Ragebeast is too expensive; you'll never Call him, and Garruk, Apex Predator or Sylvan Primordial are way better options at seven mana.

6. Reclamation Sage is maybe the best sideboard card in standard and the nuts with Chord.

7. If there is MUD in your meta I'd make space for 1-2 Skylasher in your 75.

Hope some of this is useful.

Great input, in response...

1) I agree with the Scavenging Ooze, it's always tricky to find a place for him. I think at this point I'm gonna go down to 1 Hornet Nest.

2) That's easy, Desecration Demon.

3) Good point, here's my counter to it. I have found that Coursers and Underworld Connections make a better combo, because, with all the scry land, you can filter out what you don't want, and leave the land with the card you want on top until the end of their turn, tap the land, and take that card, while still leaving it free for mana next turn. Sign in Blood is a one-shot deal, and you can't trigger it turn over turn.

4) A pair should do the trick. I'll drop the Soul of Zendikar and Gruul Ragebeast.

5) Innistrad is in there because there's so much removal... SO MUCH REMOVAL... that you're going to have three valid targets to fire off at any stage in the game. It really bones control. If I mainboarded Shandalar, I'd sideboard Soul of Phyrexia or Scuttling Doom Engine. Which do you think?

6) Yes, I will put it back in. What should I sub out?

7) See point 6.

Thanks for the comprehensive input, smithereen. I'll mix in the suggestions you made that would work best, and we'll see where to go from there.

Hey, so responding to your problem with walkers, I see that you aren't finishing playsets of either Dreadbore or Hero's Downfall in your sideboard, which could definitely help that match up a lot. Also you may want a resilient threat or two against Walker's that forces them to wait on their Walker drops to deal with your threats, I suggest Pack Rat either in the main or the sideboard, and finally, if you really need a trump card, Garruk, Apex Predator will stunt their walkers and keep kicking them to the curb and building up that Loyalty, while hurting their plans. Hope this helps :D

Thanks for the help, OutspokenFerret. I have a fourth Hero's Downfall. I'll add that to the sideboard. Mistcutters could probably stand to be dropped down to 2. Would you suggest a single copy of Pack Rat to be boarded in, and boarding out the Scavenging Ooze as the 2 drop? I'm flattered you took the time to check out my deck. Thanks again!

Perhaps add Back to Nature &/or Devour Flesh to sideboard. Naya hexproof decks are really difficult to beat with this deck since every removal is "target", assuming you play against naya that is. This deck looks fun though, might run a variant of it off my jund walkers next fnm

Temur has access to Savage Knuckleblade who is awesome also Sagu Mauler who is really hard to get rid of.

consider Gods Willing over Feat of Resistance and See the Unwritten over Chord of Calling

also feel that Sedge Scorpion should be Bloodsoaked Champion.

Sedge is there as removal. Flash him into the path of huge dudes. I can pretty much agree on Gods Willing. Chord is there for Instant ability on Nest.

for the lols run tor crypt and the torpor orb on legs because screw the other player

I'm assuming you mean Hushwing Gryff?

i know you want to be attacking but you have a greedy mana requirements. A lot of double sources can hurt you in the early game, maybe some Sylvan Caryatid can help.