Hey, this be my first comment mate, be gentle!

Personally I would Exchange the Gemhide Sliver for a Manaweft Sliver because this do only affect slivers you control.(I've never played my sliver deck against any other sliver deck, but I guess it could happen) And I would add atleast x2 Door of Destinies and, as you have life draining mana, 2x Syphon Sliver . Bonescythe Sliver is a good alongside Syphon Sliver as well. For durability. But I like your choice of keeping first strike over double-strike for the mana efficiency and speedy initiation.

And I praise you for only having Gemhide Sliver and not both Gemhide Sliver and Manaweft Sliver , as I've played against people using both, and thereby having 8 manaproducing slivers in their deck. #Unfair

How many lands do you operate with?

@Ayroth - I took your suggestion on Manaweft Sliver over Gemhide Sliver , it is the better option I just never bothered to change it.

I disagree with the rest though. The goal of this deck is for AEther Vial to be as effective in speeding the deck up as possible, to do that I've limited the deck to only 1-2 drop creatures, making it very fast even if I don't get out AEther Vial . Since it's designed to be so fast, the life loss lands like City of Brass don't really matter because most games with this deck won't go over 4-5 turns. Since it's got 12 lords all at 2 cost, the slivers have no problem getting huge and evasive.

I'm going to feel really bad for you if someone has a turn 1 or 2 Blood Moon before you manage to drop Manaweft Sliver

@-MisterJ- - Yea, I'll probably laugh... after some serious crying. Any ideas what i can sideboard to give me an answer to Blood Moon or Back to Basics early game? Is there red enchantment/artifact destruction so I can use those Mountains they gave me?

Red is king of Artifact pop, but as far as enchantments... I'm not really sure. I'm not a legacy player, I'm more of a modern player and to be honest, I don't feel that slivers are competitive in any format outside of EDH. Saying that as a Sliver lover. So.. Yeah. The Harmonic Sliver really is your best bet.

Maybe Door of Destinies and Mutavault

@Evincar - Door of Destinies is way too slow for what I'm going for. The sliver lords are much better at pumping up my creatures quickly. I would love to use Mutavault , but it would screw up my already complex mana base. Can't do colorless lands when I'm running a 5 color deck.

Hey what about Changing the Sliver Legion cards for the Sliver hivelord?? got lots of cheap lords already with it they become unstoppable.

Sliver Hivelord is a really nice card, but it will be relegated to the sideboard for me. When Sliver Legion hits the board, you can swing for the win almost every game. Sliver Hivelord is more defensive, making it best for a side board when I'm versing anything with a lot of removal or board wipes.

Hmm.. yea maybe. Also you could try going with Chaos Orb saved me many times in battles it is also colorless and low cost but rather expensive to buy.

Nice deck +1 Heart Sliver and Manaweft Sliver is a great combo.

Its a very awesome deck, i guess, but i think AEther Vial is not necessary, because you can put out all your sliver in turn 4, just like my deck ( The sliver deck, pls check out), and i think thats not necessary to use Sliver Legion because of Venom Sliver and the leeching sliver, they can shut down the oponet rly fast, +1 for me, and see my deck pls, sugestion is need.

@pedropaulo_m7 - I think you're underestimating AEther Vial . AEther Vial is very good. In order for slivers to be fast enough to compete in Legacy, which is a format where games rarely last over 6 turns, AEther Vial is absolutely necessary. Lets me get out units way faster than my opponents and lets me use combat tricks to throw in units on my opponents turn. I took a look at your deck, and that's mostly what it's missing is AEther Vial .

i didnt know that (or had'nt thought) that AEther Vial could be used in oponent's turn

but why not Leeching Sliver ?