The big change I think I would make to this deck is a pretty simple one, actually. I would use Unnatural Selection instead of Call to the Kindred ; its much less fragile because it isn't an aura, and it also lets you take control of ANY creature on the board with Sliver Overlord (which is your general of course, so it's easy to pull off) for 4 mana, or less, with Training Grounds or Heartstone !

I also might add in Harmonic Sliver for utility, and take out the Reflex Sliver due to its 4 CMC.

drawback to Harmonic Sliver is that it says 'destroy' not "may destroy." So, with that, on a very short order, my various creature searching enchants are gone, just by the nature of them pulling creatures into play.

Unnatural Selection may get a spot, but it wouldn't be a replacement for call, maybe one of my less useful slivers, or maybe Hypergenesis

Adaptive Automaton is a colorless creature that receives all the buffs from slivers and provides a +1/+1 almost like a Predatory Sliver . Might replace Blade Sliver with it?

I approve of the rainbow.

No Doubling Season ? Being able to produce 2 slivers for every one mana spent is one of the cheapest but effective ways to win EDH.

You know Call to the Kindred can't target a sliver if you have Crystalline Sliver out?

Crucible of Worlds for all those lands you're sacrificing?

Intruder Alarm to help with comboing out/generate infinite mana/tokens.

Patriarch's Bidding for a game ender.

Also, you have no way of bringing anything back from the grave. If somebody counters/effectively board wipes, Sliver decks are done if their combo pieces can't be retrieved. There's a crazy amount of cards that bring either everything back, a few select or one creature type. Just a suggestion.

I dont particularly care about getting the lands back, its mostly a one sided board wipe thing...

I am aware that 'Call' can't target a creature with shroud, but i typically keep the crystal sliver in hand to flash in and 'counter' a spell.

I also know the issue with graveyard recursion, however with the speed of this deck it is rarely an issue... Typically t6-8 the game is over and thats with 4-5 player pods. 1v1 the game ends on t6 every time, though Ihave thought an Eldrazi, or Elixir of Immortality could be useful

I meant for cards like Wooded Foothills that you could just keep playing and land fixing. That's what crucible of worlds would be for.

So what's the point in destroying all the lands so much? Is it due to the aggressive nature of the deck, so the loss of your own lands is negligible in the "long" run?

the land destruction is for mid game tempo control if im playing another aggro deck (or a control deck). And since every sliver in the deck is also a land, I dont have any issue with the mana afterward

+1, looks scary. But have you considered Mutavault ?

Sorry, didn't see you already had it.

I have no suggestions, only worship.

a bit out of my price range. Looks fun though :)

1 thing, you have a 100 card deck NOT including your commander. Which card is actually not in the deck?

I keep hearing mention of your land destruction combo in the comments here. As far as I could tell, the combo pieces are of All Is Dust + Ghostflame Sliver , am I right? Not that I want to crash the party, but I believe lands are all considered colorless permanents, so All Is Dust wouldn't hit lands at all. Sorry again for this, just thought it might help...

I recently took out all my land destruction Catastrophe , Decree of Annihilation , Armageddon and Boom/Bust due to my shop/play group looking down on global land destruction (individual land destruction is OK)

Ah, I see. Yeah, most play groups I've found look down on mass land destruction.

Wow, sounds like to me that the play groups that you guys play in apparently are scared to play a deck that works right. Where as the one I play in doesn't care what you play at all.

Why did they ban Mana Echoes

several people that regular the shop hate "infinite combos" so they banned cards that people used to facilitate those combos

DO...do you actually own all these cards?! Holy moly that's one expensive deck!