Add 3 Ancient Ziggurat instead of Gemstone Mine.You can only use Gemstone Mine three times.

@IguanaMan The reason Sliver Hivelord is in my sideboard and not Main is because I really do not run into anything that can destroy my slivers; Slivers usually get really big butts so creatures are not a problem, it's usually just spells, and most of them are control spells so Hive Lord would not help in most situations (to my experience)....As to Groundshaker Sliver it's to high coasting, also trample is not really something that I run the need of using maybe against elfves, or merfolk it would be usefull but other than that not really, and it's not a good enough use to run in my SB. Abzan outlast is more of a standard theme, maybe in casual legacy, but even then I should be able to out run an outlast theme deck. Thank you for the +1 and suggestion though. :)

@tehAgg Venom Sliver + Thorncaster Sliver is a great combo, I run a similar deathtouch style theme in my Rakdos Deathtouch deck. Unfortunately Thorncaster is too high costing of a card for the tempo of this deck, also it relays on two specific cards to really be useful enough for me too use it, and those odds just are not good enough, considering throncaster by it self is not "good" for this deck. However thanks for the suggestion. xD

@deagent Whoa Lotus Petal seams like a wonderful idea, I will most definitely do some play-testing with it and see how the card plays out in a real game. Thanks for the suggestion!

@bfretro That's really funny that you say that since I actually replaced Ancient Ziggurat with Gemstone Mine a while back ago. (Lol) My reasoning was that since Ziggurat only allow's creature spells; I would run into trouble when I'm trying to cast my sideboard card I.E Rest in Peace & Swan Song. Decks like dredge & anything "Swan Song" kill worthy would propose a lot of trouble for my deck. Plus I never really run into trouble with Gemstone Mine, I've rarely ever run into any problems of using all of my mining counters, and even when I did I had enough of a mana income that it really did not mater. Although there have been some games, very few, but there have been some, where if I had another counter I could of won or at least sustained for a little while longer. I'll definitely play around with a happy medium between those two cards and see how I can improve my game play, Who's knows maybe replacing one zigg w/ one mine might be just what I needed. Thank you for the suggestion. xD

Dude are you still playing with this deck?

I built a very similar sliver deck to yours (inspired by yours) and have some suggestions for you, if you are interested

Vulbarg Yes I'm still playing this deck, I take this to Legacy tournaments at my local FNM, (Friday Night Magic). Although I haven't played magic for like the past 2 months since I've been busy with school...(Exception of Cockatrice)

Vulbarg What are your suggestions?

I just post my deck and you see for yourself :-)

http://tappedout.net/mtg-decks/hive-aggression-no-sliver-honey-for-you-bro/

You can't build a more aggressive sliver deck right now IMO

add CoCo for instant speed slivers

I feel like this needs more card-draw..