Zendikar Resurgent: this would accelerate your deck, drastically.

Thank you I was actually looking at that card yesterday, I'll have to buy one or four

Have you thought about incorporating some of the shardlands in this deck for color-fixing? Cards like Seaside Citadel, Arcane Lighthouse, Jungle Shrine and so forth might get more work done than lands such as Scoured Barrens.

@Hc_Clan I haven't been screwed by my mana base... yet. I do really need to replace some of the more limited lands.

Never hurts in a 5-Color deck, and sorry I totally meant to include Arcane Sanctum in my original comment, not Arcane Lighthouse.

I would recommend Screeching Sliver as an alt wincon, an opponent could gain infinite lifes or won't let you attack him, etc. Necrotic Sliver is an aamzing tool if something is bothering you too much. Urza's Incubator is cheap card you can use to help you out, and finally Amulet of Vigor is cheaper now that the modern combo was banned, that can help you with the bounce lands. Cheers!

@EldraziSliverPhyrexian I wasn't aware Amulet of Vigor dropped in price, that's awesome.

I feel like Necrotic Sliver is too redundant with Planar Cleansing, Akroma's Vengeance etc.

Screeching Sliver is definitely sideboard material. The Meta doesn't have anyone that goes infinite life but some will combat damage lock.

I like Urza's Incubator I just don't know what I want to remove.

Major Update to Mana-Base. Using all the Shard lands now.

Holtzman,
Nice deck! (I really hate Slivers, so by that I mean I'm pretty sure I'd hate this deck even more than normal!) :-)

Argeaux and I were chatting about Spirit of Resistance as a possibility for her deck General Tazri's Allies . I noticed you're running it, so if you get a chance we'd appreciate your thoughts on the card. And no worries if you don't get a chance!

On my slivers deck I ditched Ancient Ziggurat. The limitation on the mana it produces is way too great. I also ditched Rupture Spire and Transguild Promenade because of their slowness. Entering tapped and also forcing you to pay mana is way too high cost in my opinion.

As alternatives you have:

• Cavern of Souls the most expensive one and with good reason.

• City of Brass and Mana Confluence will hurt you a bit but thats why you're playing Essence and Syphon.

• Exotic Orchard will give you any color every time.

• Mirrodin's Core, Slow but you can still tap it on the turn it enters.

• Thran Quarry, fits your deck very well.

I'll assume you want to replace Alara and Tarkir tricolored taplands with shocklands, but then there's the $$$ factor.

Lastly on lands, I'd play Homeward Path just in case someone steals Overlord, because after that happens it can get really bad for you.

A while ago I used to play this funny interaction: Sliver Hivelord, Psionic Sliver and Fungus Sliver on the battlefield, you will hit opposing creatures and at the same time grow yours bigger. Add in Sentinel Sliver and you can make yours grow twice, attacking with your horde and before the damage is assigned, tap them and they'll grow once, the blockers damage comes and your slivers will grow again.

Oh there's another one that comes to mind: having Striking Sliver, Venom Sliver and Hunter Sliver will kill anything, specially those creatures your opponents wouldn't use for blocking, Llanowar Elves, Priest of Titania, Birds of Paradise, Seedborn Muse etc.

@hfvalenz yes the City of Brass type lands are the next thing I'm going to buy for this. I'm putting my $$ in Pillowfort of Flaming Death atm

I don't know why I didn't put Homeward Path in sooner. People jacking my Sliver Overlord is one of the reasons I stopped playing him as commander.

I had a fun interaction with Sliver Hivelord , Psionic Sliver , Syphon Sliver. Shock something gain 5 life. Was pretty sweet.