Blackadder

just got an ekstra idea, Intruder Alarm Gives you an ekstra way for infinent turns and mana other than galvanizer. But the deck deffinantly need to drop to 60 cards, so comming up with ekstra ideas, kinda doesn't make that easier I guess.
But in the end, what I really love about this deck is a pick price of less than 20$, now that makes it even more fun when it works.

Well if it was me building something like this, it would go kinda like this:
http://mtgvault.com/blackadder/decks/myr-rerun/
Specially created for you.

Buff, wft do you think Sliver Legion does, only removal spells are a danger.
Shroud kinda ruins the Idea of the Imagecrafter and Sliver Overlord, since it's "gain control of target sliver"

And Myr Matrix or Myr Servitor, great way of feeding your Time Sieve

Any updates for an quiet old deck are welcome

Consider if you wanna play an overrun deck, buffing a storm of small creatures or get your biggies in play trying both seems like a bad idea, I think you may have a hard time surviving long enough for you to win much with this build, most of your cards are better used with other cards.
Find som token generators (Beacon of Creation, Ant Queen, One Dozen Eyes, Living Hive ect.) make em big with CoA, Overrun, Giant growth, Rancor, Blanchwood Armor ect. Or choose your biggies and find a way to drop em fast and find some cards to protect them from your opponents spells.

I guess this is a vintage deck based on the spread series you've chosen from, if so 4 petals is just 3 to many as it's restricted. And it seems like you need some creature to sack for your cullen?

consider exchange Wirewood Channeler or Priest of titania with your BoP
Mana web seems way more cool than it actually is, consider elvish piper to drop your octopus alittle faster with less chance of counter.
Reduce your Islands for forrests more like 9/5 instead of 7/7
And if you chose the Wirewood Channeler, enchant with Pemmin's Aura and you got infinent mana of any one color pretty fast.
Then you can consider Joraga Warcaller making all your creatures infinent big. Then drop a taunting elf to elliminate blocking
But this is a compleetly new deck all green, which kinda wasn't the point I guess;-)

Which is also restricted ;-)
https://www.wizards.com/Magic/TCG/Resources.aspx?x=judge/resources/sfrvintage
Worldly tutor might be a better choice

you might wanna reconsider 4 x brainstorm since it's been restricted for a couple of years.