The owner of this deck hasn't added a sideboard, they probably should...
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many abilities
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you're kind of all over the place...you really need to cut this down to a 60 card deck, and you need to get 4 of a Sliver which abilities stack, and only 2 of a Sliver if it doesnt stack. For example, Heart Sliver gives Haste....you cannot have double haste so you should only need 2 Heart Sliver's. Virulent Sliver's poisonous 1 ability on the other hand does stack, so if you have 4 Virulent Sliver's on the field then all Slivers have poisonous 4, which is why it is best to have 4 of them in your deck. Also cannot stress enough on having 4 Homing Sliver's, they give Slivercycling and let you find any Sliver in your library. I would also cut down on the artifacts, if you want more mana then put 4 of the Gemhide Sliver's in there, they will let you get anything you want out. Here's my first Sliver deck if you want any ideas. http://www.mtgvault.com/ViewDeck.aspx?DeckID=387185
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Also may want to rethink your lands also, I really don't know why you chose some of the ones you have in there. You have WAY too many that come in tapped, you are going to get slowed down too much. You have 9 Terramorphic Expanse which makes this whole deck illegal, and you only have 1 Glimmerpost which defeats the whole purpose of the card since you only have 1 Locus in your entire deck.
thanks for the input