ManiacalManiac

I'm not a fan of Guttersnipe, the theory is great but it does nothing the turn it comes out and is easily removed due to it's weak body. On average I'd be willing to bet if you ran 4x Rift Bolt you would get an extra point of damage from it with a 1/4 of the investment. After all if Snipe worked more burn decks would use it but they don't.
The main thing I think you need is some card draw. Magmatic Insight is good for the mid to late game turning those needless land draws into something good. Or one of my favourites, Browbeat.

A deck that performs in modern for under $100 is in fact very budget. Most are $500+

The main thing in modern is the land base. Having a land enter tapped on turn 1-4 can be the deciding factor in winning or loosing in a competitive meta, when someone says modern I immediately think competitive . I love scry lands and have them in all my casual kitchen table decks but I don't run them in my modern decks. The Scoured Barrens should really go in place of Isolated Chapel and the scry lands are good but should become Shock lands. All in all you really don't need that much black to run this deck so you could cut the shocks for more basics and they would probably be just as good.

Very nice build man. +1 from me.
Death Cloud as a 1 of because why not?
as well I think Consume Spirit would be really good in this build. Your devotion can get pretty high fast here so tapping Nyx for a ton is easy,it's also great to recoup the life from pox and your demon.(which I love by the way) Not to mention what your opp is dishing out. You don't exactly take the defensive in this build.

-4 Falkenrath Noble and +4 Altar of the Brood, It will create a faster mill combo. As well you should probably cut the 4 Shred Memory for 4x Simian Spirit Guide which will sped you up to combo a turn earlier.

I also agree with the lands. I usually don't give land advise, Since most people know the land base can always be improved depending on what you have to work with. ($)

I've done it in the same deck I described, I run 4 of each lol The nip is usually saved to turn on the mimic tho.

You can only run 1 Mytical Tutor to be legal in any format, replace the 1 with Demonic Tutor (which is better anyway) and you'll be good to go. Also since you playing casual vintage with such a high mana curve 1 Sol Ring should be a auto add in this. I'd cut Dromar, the Banisher for that. It doesn't really fit the rest of the deck and you don't need that many finishers, Your 4 Sphinxes should be enough. Ruthless Deathfang is also very expensive for what it is, maybe cut it for Dictate of Erebos or Grave pact. 1 is enough tho since your running tutors. add 2 more lands to 20.
These are obviously just my opinions and should be taken as such but I think they would all improve the consistency and make it more effective. Happy Casting. :)

I run a black white deck using Edge of the Divinity and I love that card. Nightsky Mimic is very good with it, effectively turning it into a 7/7 flyer on turn 3. It's all vulnerable to removal with high probability of getting 2 for 1'd but man is it fun when it sticks. I think you should find room for some protection like Brave the Elements or God's Willing. Getting 2 for 1'd really hurts decks like this and is often the deciding factor in a win or not.

Considering your ramp is mainly in the form of land enchantments I think you should be running 4x Arbor Elf. They will really speed you up, I would cut all 3 Giant Adephage and 1 Skyshroud Claim for them.
Just my opinions of course. Happy Casting :)

Clearly the only way to deal with it is to win before the choice is made. I just feel the reward is just not worth the chance to take. To many things can go wrong without options out of your own control. Just my opinion of course, the cards fun for a laugh but unplayable.

Demonic Pact is unplayable if you can not guaranty a way to donate it or destroy it. Neither of those options can be done by Black.

Blasting Station may work well in this build.

Why is Redcap not in your main? It's your best win con once you combo off? Melira and Seer should also be a 4 of's since they are main combo pieces, No?

It's almost impossible to have a competitive modern deck without expensive lands. You just can't afford to ever put yourself behind a turn (have a land enter tapped) in modern. If you want to get into modern without spending a lot build a burn deck or green devotion has been doing well on a semi budget.

http://www.mtgvault.com/maniacalmaniac/decks/mlgnnt-mllng/
This my modern mill deck. It has been performing very very well the last 3 weeks at modern events. Placing 2nd 3rd 2nd. Usually out of 12-20 or so players in a very competitive meta.
Yes! Hedron Crab and Mesmeric Orb are very very good cards for consideration, they're better choices then Sculpt or Scour IMO, since the potential cards milled compared to mana invested far exceeds anything else other then Archive Trap. I splash white for Path and a lot of great S/B options as well as the 4 additional fetch lands to trigger the crabs twice. Path and Ghost Quarter trigger the Archive Trap if opp isn't already fetching which most modern decks do. Game 2 players don't want to search making Path the greatest removal ever printed and basically allowing me to run 3 Strip Mines in modern.

I don't share your enthusiasm for Hallowed Moonlight. It's not that good it doesn't stop twin like every other answer which is already being used it only slows it down by a turn. Same with Vial, being its only till end of turn your slowing them down 1 turn but they still have a vial in play B/C Moonlight doesn't effect the current board state. I may be wrong about this but I've given much thought and decided it's great on the outside but comes up short in to many situations. Spellskite would be a much better S/B option then Hallowed Moonlight.
I do however support your use of Sun Titan and Kitchen Finks.
Of course these are just my opinions and take them as such. Happy Casting :)

I am very much debating the addition of Strangleroot Geist due to it's annoying qualities as well as it's haste. Hitting just one with a Craterhoof on a Genesis Wave could be a winning factor. My Ooze takes care of most graveyard shenanigans while being a bigger threat then the Dryad.

Thanks for the suggestions. I just got back from a modern event now and went 3-1 with this. Last minute I did actually put a dismember in the S/B which came in handy. As well my first match up against Bogles I cast Worldspine on turn 4. And opp just couldn't deal with it.

Edit, I must apologize for my previous comment regarding Poisonous and Virulent Sliver. Up until 3 days ago I was of the belief that Infect and Poison were the same. I've since been informed that they are not. Poison only gives counters for the amount stated, not damage dealt. Again sorry for misleading you.