ManiacalManiac

Cryptbreaker as a 4 of! It was probably why Zombies were a tier 1 deck in standard all of last year.

Nice build. I played a Fevered Visions deck in standard and always meant to design one for modern but never got around to it.

I really think Furnace of Rath is gonna be more detrimental to you then beneficial. I think Ebony Owl Netsuke would be a much better suited to the build. As well as giving you another win condition without essentially putting all yours faith into Fevered Visions.

I'm unsure about Exhaustion too. Do you find it does enough to close out the game? Trinishpere may work well here since you're giving your opponent so many cards it may just be enough to restrict them from playing to many spells in any one turn.

Anyway nice deck and just some suggestions.
Happy Casting.

Actually even better would be Door of Destinies

Add Coat of Arms

Oh snap I stand corrected. That line of play does actually work with Sunbird's Invocation.

However it still doesn't work with the Primal Wellspring since you never actually "CAST" the copy it makes. When the original resolves it will be the first and only Approach that has been "cast".

Oh absolutely, half are unplayable IMO.

Well b/c some people like to be competitive.
Distress is a far cry away from Thoughtsieze especially when you want to loose the life to pump the DeeathShadow faster.
Suggesting Tragic Slip in place of Death Shadow is just bad advise since it's not even close to the same thing. Death Shadow being the best creature in this deck for what it wants to be doing.
Hellhole Rats is an unplayable 4 drop when Vexing Devil is a solid 1 Drop. Again doesn't do anything that this deck is trying to do. Honestly, all around bad advise.

What this deck does want is 8 fetch lands, 4 Shock lands and 4 pain lands. to really get Death Shadow big fast. The other thing I will suggest is to cut Heart-Piercer Manticore and play Wall of Blood in it's place. Grab the Rains should probably be a 1 or 2 of in the build as well. Not sure where to fit it in tho. Maybe go down 1 or 2 Vexing Devils.

Crash Through seems like a poor choice for the build. Seems like there's only one creature (Glory-Bound Initiate) worth giving trample to and that's a stretch as a 2 of. Aphotic Wisps maybe a better fit for this deck.

I'd add 1 Ghost Quarter as well since most competitive decks other then mono coloured ones run very few basic. Which Ghost Quarter can hit essentially making it a Strip Mine every turn once opp has no more basics in their deck.

Actually you will Not win the game if you copy Approach with Primal Wellspring or cast it off of Sunbird's Invocation. Approach literally says it must be cast from your hand which neither way actually does. Both ways are a nonbo.
Primal Amulet may still be good for this build but not as a combo with Approach. Sunbird's Invocation is way to slow however and should probably be cut for Disallow or an early targeted removal spell like Lightning Strike.

You should be playing LD lands like Ghost Quarter and Wasteland. Since you're already running Crop Rotation and Crucible you gain a very efficient way to lock down your opponent so you can survive till your win condition.

Stirring Wildwoods is a great 1 of man land in many non elemental builds.

Admittedly I'm always thinking about ways to tweak/tune any deck. My suggestions were just that, suggestions to make your deck more efficient. I will also say that I should have said I really like this deck in my original post.
My intentions were just to point out the fact that Duel Casting will be a dead card more often then not, currently.

If you really like it perhaps adding Thermo Alchemist is an option. It combos pretty nicely with Dual Casting.
For example if you have Alchemist equipped in play. You cast Bolt then copy bolt with Alchemist's untap trigger on the stack it get's untapped after the copy resolves and you can copy the original a second time.
With all the instants in your deck you really can abuse this combo even in response to a removal or counter spell.

Just my opinions, Happy Casting. :)

Just so you know there is no reason at all you should be running Walk the Plank in this build since it requires BB . You only have 4 lands that produce black with no way to fetch them. The chances in having both out in order to cast it is so minimal. Not to mention having the Drowned Catacombs in the build hinder casting the rest of the deck efficiently as well.

The treasure is nice but I sided with Unburden because Heartless Pillage suffers from the same problem Mind Rot always has. They are crippling early on but once your deck is doing what it does they are dead after turn 4 or 5. The cycling is what really make the effect playable IMO.

I think a rather fragile part of this build is that you need to play Natural Emergency and then wait a turn to go off. Making it very vulnerable to wrath situations. Natural Affinity as I mentioned above helps this as well I think Sylvan Advocate could work. Gives an early blocker and once the lands turn they have the potential to be 4/4's. letting them survive Pyroclasm or Anger of the God's.

Well I do see how you get another land then pay for Aggravated assault. and then carry on. Just thought you had the combo at that point without it anyways. I suppose this lets you make the tokens needed if blockers are in the way.

Not sure if I'm tired or something but I really don't see how Splinter Twin Combos off?

I don't think Duel Casting works in this deck. Since you don't actually cast the copies it makes it wont trigger/combo with Pyromancer Accession or Harness the Storm which wont combo with any copies. Not to mention you basically only have 4 of 1 creature in this deck (considering Simian Spirit Guide shouldn't count as a creatur) and it's an aura so it will be dead in your hand more often then not.

Love the concept.
A few considerations could be to add Ghost Quarters or Wastelands to lock your opponent out of the game. Seems easy in a deck already running 4 Crucibles and 4 Excavators.
Also a friend of mine runs a Titaina deck and a trick he uses when I try to wrath his board (kill all his lands) is cast Natural Affinity turning all my lands into creatures as well.