Your gonna wanna grab as many Shock lands as you can get your hands on. the come into play tapped lands are way to slow for slivers

first things first, your sideboard is terrible. Boros Charm is an amazing charm, much better than savage summoning and should be main boarded. Ratchet bomb is ONLY a sideboard card, because it is going to screw you against control. You also need to mainboard some burn spells, mizzium mortars, searing spear, or pillar of flame, too many creatures without too much removal is never good. Lava axe is just bad, never play it out of limited. Boarding fog in is bad, fog is good in one deck and one deck only, turbo fog, which isnt a thing right now(thank god). The gates are too slow for a tempo deck, you will also be a turn behind, shocks or dual are necessary, same with evolving wilds. Bonesycthe Sliver is going to be your win condition, double strike is very powerful, especially with a team of them, make it a four-of. Adding rancor and/or unflinching courage would improve the deck. Groundshaker Sliver is too slow for the deck, it should be removed for better spells. Steelform is not very good either, the bonus it gives is not relevant too often. Make battle sliver a four-of, as it is a very good finisher after bonescythe is played, as is thorncaster. In aggro and tempo decks, consistency is very important, so making as many things four-of is almost necesary to win. another option for a finisher are Gruul War Chant

yes I am working toward a playset of Sacred Foundry Stomping Ground and Temple Garden . Thank you both for the comments. I had thought about trimmingthe number of creatures down to around 20 to fit in more answers to various situations. I think the biggest threat to this deck is mass removal, I believe that at a base of 20 creatures my opponents won't be able to counter/remove all of them all the time slivers will be swinging at some point I just want to keep them alive once they get out there. One thing I had thought about was using Hive Stirrings with rootborn defences to generate more sliver tokens but mainly to make all my creatures indestructible.

well in a sliver deck your going to want to have alot of creatures so idk if that the best plan really. rootborn defenses seems fine but the boros charms should be enough. but yeah your going to want to grab those shocks, slivers tend to be slow enough as it is. and a Megantic Sliver wouldnt hurt, even if its a one of.

here is my take on the deck Standard Slivers.copy

Here's my playlist, take a gander:

deck-large: m14-slivers' run ramp

I guess I should also have mentioned that I am avoiding using any of the cards that will be rotating out in October (M13, Innistrad, DA etc.) just to avoid having to switch them out again come Oct. I am not sure whether or not I want to drop the groundshaker to a one of and add a megantic as a one of, or if I want to keep both Groundshakers and drop my sentinel and striking slivers down to 3 ofs and add 2 Megantic to have both trample and +3/+3.

vigilance isnt really crazy good.. one drop[s are nice.. but the beef megantic sliver gives is nice. and you shouldnt hinder your deck by not running card that it could run.

megantic sliver is way too slow, and vigilance is better that you think, along with first strike.

Add the part to your description that you're not using M13-AVR because I immediately started typing a bunch then saw the comment where you don't want to use them. Cavern of Souls was the first to jump off my fingers too.

26 lands is waaay too much. Even control doesn't run that many.

No Syphon Sliver? Also, only run ~20 land if you're running 4x Manaweft Sliver s. Check out my standard 5 color slivers deck: 5 Color Standard Slivers? - Chromatic Lantern helps a lot w/ 5 color btw.

If you're going with 5 color you might want to start buying those shocks.

You'll probably want at least one Swamp just in case you have to Evolving Wilds for it.

Also, Evolving Wilds is rotating out. Unless Theros reprints it or its twin, you're gonna need a different land.

I wouldn't limit myself to only ravinica block and M14 this early on, you can easily make your swap out plans in advance. When a new Core launches its an exciting time with so many cards in standard. Limiting yourself to RTR block is like playing yatzee with half the dice and your opponent playing with all of em.

But getting a 3-die Yahtzee is so much easier than getting a 5-die Yahtzee.

The point is that a sliver deck using Inniastrad block is stronger that a sliver deck using RTR block and M14 only.

The point is that slivers are going to be top tier and limiting yourself makes the deck tier 2/3.

I appreciate the thought Reconaissance and will keep it it mind. I feel right now though that I want to try the deck as is and after some playtesting, preferably against a sliver deck running Inni, DA and the like, and see how the matchups playout. There could very well be changes made to the deck before it starts competing at FNM but I want to wait until I actually have the cards in hand before making those decisions and choices. Again I appreciate the input and welcome other ideas.

The one sure thing is that I will be working toward shock lands, however I cannot justify paying the price it would cost to purchase them, trading will be how I acquire them and may take some time.

Predatory Sliver seem to be one of the better slivers in the family why not 4?

Bonesythe should be the 2x as it can only contribute one effect that isn't or can't be multiplied. In fact you should re-check you whole build based on this idea. It will increase the decks power 100%.

most slivers that are crutial to your deck have the same converted cost of things you would wanna kill with ratchet bomb so it probably wouldnt help this deck. Its really for a tough mid-range deck to remove early threats and your deck is that type.

I understand your point but the deckbuilding philosophy I go by is that if the card is a main part of my win condition, (double strike on a bunch of pumped, flying slivers being the main wincon I have set out for this deck) it is a 4 of. If a card is part of winning but only acting in a supporting role I can run between 2 and 3 of them. If there is a card I wouldn't mind drawing but really won't ruin my day if I don't see it I make them 1 of's. With the predatory sliver only giving +1/+1 (yes I know they stack) I chose to start the deck with 2 of them and 2 Megantic slivers giving a total of +8/+8 my slivers can get if all 4 come out which doubles the +4/+4 they would get if I had 4x predatory slivers out. Even if I only get one megantic out with both predatory slivers I would bet +5/+5, still beating out a playset of predatory slivers by 1. I have done my math :)