DedWards

Problem with basing such decks arounf a creature is it limits the type of spells that can be played. Cyclonic Rift, for example, actually does make for a good pseudo mass removal that will not remove Guttersnipe. Mizzium Mortars is arguably better, but Rift can 'remove' creatures with toughness higher than 4. I guess the use of these would be up to personal preference though. Rift is an instant and can make for interesting combat response :p

I've had an opponent ulti Jace, Architect of Thought to fetch Assemble from his own library (forget what he fetched from mine). I died soon after.

Also, Cyclonic Rift and Mizzium Mortars mite help with board control until Assemble comes out.
A few Detention Sphere wouldn't hurt, even if only in the sideboard.

Imagine a Door of Destanies (naming human) and Thrumming Stone out, then you play one Shadowborn Apostle :p

I like Anax and Cymede, but I would've prefered if it said +1/+1 counters and gain trample until end of turn instead of just the temporary +1/+1 (I don't mind the trample being temporary) if I get my hands on any, I'll give it a try.

I tend to build main deck before considering sideboard :p
Chained to the Rocks will be a definite 3x, maybe a 4x in the sideboardenchantment hate. I see a LOT of sideboards having some form of enchantment hate, especially with all the enchantment creatures.

Every time I look at my 3 Pyrohenia I want to get use them along side Kor Firewalker and with the Kor being white, Lightning Helix comes to mind. As I go through this procedure, Pyrohemia becomes redundent and I end up with a Boros weenie deck :/

I do think creatures like Kor Firewalker and Spiremare could work well with Pyrohemia, I just end up with designs where Pyro's useless :(

I don't know how it'll be post rotation, but I've found most things I want to destroy are out of Abrupt Decay's range. Just a personal observation. I suggest using Putrefy in its place if you come across the same problem I did

I basically pulled the base of a Dragonstorm idea I have for the storm here and Sprit Guide works very nicely there, but that's probably because Dragonstorm costs 9 mana and I've often been 1 mana too short.

I was actually thinking of adding a few Goblin Assaults.

You forgot Paradox Haze :p

I know of those and if I where to get serious about this deck, I would use them and a few others.

This situation is exacly what sideboarding is for. Master Biomancer decks are generrally creature based (like most of standard), so until Theros comes out, Essence Scatter will be a nice filler for Gainsay.

Glad to see you've had some good playtests. I find the best thing you can do with a new deck is playtest it to see what actually does and does not work.

Your deck inspired me to design a deck:
http://www.mtgvault.com/dedwards/decks/thromok-the-flung/
:D

Seems we're brothers in arms (I'm an aggro player too) :p

I wouldn't drop below 3 Shocks. I'd even put the 4th in the sideboard with 2 to 3 Electrickery. White weenie's creature base tend to have 1 to 2 toughness (before the pump comes out) and Humans tend to follow the White Weenie pattern. I think Humans will be a big thing in Theros.

Just a warning; the cycling lands aren't Modern legal

Azorius Charm's "draw a card" and "put target attacking or blocking creature on top of its owner's library" will hep a lot.

if you concentrate more on Guttersnipe doing damage and control, removing Dragonshift and Molten Birth will open spots for Curse of the Swine and Azorius Charm (and Lightning Strike). I personally see the Dragonshift and Molten Birth 'combo' as a little gimmicky, a mass removal Spell (Supreme Verdict?) would work better. Also some Mutavault is good in most control decks I've gone against.

I find our conversation weird. I (almost) never play blue, and by extension control. All my suggestions come from my experience playing against control decks :p

Shock MUST stay. The power of a turn 1 removal spell out weighs the extra damage of Lightning Strike. If possible,try run both.

Chain to the Rocks is an awesome spell, but doesn't fit this type of deck. Mostly because it won't trigger your key card's (Sniper) ability. M14's Celestial Flare fits better, though it requires 2 white :?

Gainsay is definitly a sideboard option, Peak Eruption is another possible sideboard card.
Voyage's End and Lightning Strike are mainboard options.
I really like Nykthos, Shrine to Nyx too, but I doubt it'd be good in this type of deck.

Master of Waves from Theros granting +1/+1 to the element tokens mite make it faster.

Young Pyromancer mite help with the Dragonshift idea

Haste isn't really required. Just play a Reliquary Tower in your turn and wait for the end of the opponent's turn. Then discard to Zombie Infestation during the end of the opponent's turn, the Zombies will be able to attack in your turn :p