33 Islands and you've got a good start.

Fabricate , Tezzeret the Seeker , Sol Ring , Everflowing Chalice , Vedalken Archmage , Master of Etherium , Wurmcoil Engine , Inkwell Leviathan , Mycosynth Lattice , Solemn Simulacrum , Fact or Fiction , Steel Overseer .

Look into some Arcbound stuff too.

Hey wait... but Memnarch is colorless... wouldn't that mean that this deck has to be completely colorless?

Not anymore. Due to the new color identity rules, Memnarch is deemed as a blue creature due to the plus activation costs. So he can be the commander of a mono-blue deck. Same goes for other commanders, like Bosh, Iron Golem (who is red).

Have you considered Prototype Portal ?

I like memnark as a commander, but in my experience, a well timed removal spell or enchantment can cripple you since you are so artifact reliant. Ex. Creeping Corrosion, Bane of Progress, Aura of silence, Vandalblast, Shattering spree... the list goes on. So my suggestion is to add 5-7 counterspells.

As an example, add arcane denial, counterspell, negate, cryptic command, dissipate, dissolve, pact of negation, and remove more underwhelming threats, like golem's heart, darksteel relic, silverskin armor, paradise mantle, whispersilk cloak, master theif, and vapor snag.

The plus side is that even if you have your darksteel combo out, you still can stop other people's plays with your counters, so they are definitely worth running, even if you add 2-3 more than the 1 you have.

Best of luck

More counters are certainly an option, though I play more casually so I try to be a little nicer than usual with my decks. Excellent insight though!

I'm confused as to why Inexorable Tide is in here, when you've only got three cards that involve counters (Ring of Three Wishes , Lux Cannon , and Blightsteel Colossus ).

Arcum Dagsson deserves a spot in this deck all day long, I think.

This... is... awsome. Many combos... Such wow... I like it! + 1!

Really nice deck. Maybe Conjurer's Closet would be a nice addition?

erabel, What's wrong with that? Perpetuating the ability to pull what you'd like when you'd like it is one of the key mechanics in one of my decks where Inexorable Tide , Contagion Engine and Thrummingbird are all to keep my Ring of Three Wishes stocked up. :]

TheArkitect, Speaking of my deck, I'm running an Isochron Scepter in conjunction with the Prototype Portal , the thought behind it is to imprint as many of my smaller instants as I can on them so I can use them repeatedly. :]

That was meant to be a suggestion, and not so braggy sounding. :p

+1

@erabel: What Syde said, but it will likely be coming out to make room for future cards that are simply better. I admit it is a little misplaced at the moment.

@Akamatsu: I thoroughly agree. I'll be trying to find one as soon as possible. Thanks for bringing this awesome card to light!

@MaitreDesBlocs: Many comment. Much appreciate. Wow.

@Helixr: I thought about it, but I found that I don't have enough permanents with decent enter-the-battlefield effects for it to be useful.

@Syde_FX: No worries, though that combination seems really awesome, I don't have too many instants or sorceries that would work well with what the deck is trying to do- that is, ruin everyone's day by blowing things up or taking control of them while at the same time making sure that anything I lose can come back.