Quote from Sharpened »You need more basics.
I know it seems counterproductive to add lands that only tap for a single color when you want better fixing, but it's true. Sunken Hollow and Smoldering Marsh are just going to come into play tapped. You'll still have difficulty turning on Drowned Catacomb, Dragonskull Summit, and Sulfur Falls. It's important that your lands that can come into play untapped actually do so.
You have some filtering with the Signets and Graven Cairns, but you probably want Cascade Bluffs and Sunken Ruins as well. Cards like Ash Barrens and Grixis Panorama can be untapped lands or can help you find a basic to allow your buddy lands to shine. You will have opportunities to play lands tapped, since your not doing anything on turn 1 (except playing Kederekt Parasite in a deck with only 2 red permanents - not ideal).
Also, check your colorless utility lands. I get some of them, but Halimar Depths, Reliquary Tower, Temple of the False God and Boseiju, who shelters all all strike me as unnecessary. Yeah, getting something countered sucks, but your playing a bunch of redundant spells. If they counter one wheel affect, the next one will work.
Other than that, you split your mana relatively evenly, despite the fact that the casting costs in your deck are not evenly split. You have very few red cards, and yet you run as many red sources as you do black sources, when you play lots more black cards with more intense casting costs (see Underworld Dreams).
And obviously, fetchlands would be huge. They grab you duals, they ensure your buddy lands can enter untapped, they are exactly what you want. I assume budget has kept you away from them.
Hm true, I always overlook the quantity of basic lands I put when considering the amount of colored mana I have to spend. The reason why I put Boseiju, who shelters All is because we have a permission Azami in the playground ;( and imo Reliquary Tower is a must because Waste Not, Howling Mine and Geth's Grimoire nets me tons of cards I may need to keep myself on the board. I don't wanna spend tons of money to make my manabase cause I live in Brazil and cards here are thrice expensive, that's why I didn't include Cascade Bluffs and Sunken Ruins, the fast lands and the fetchlands (Scalding Tarn is pricey as hell now). Currently my manabase looks like this:
Boseiju, Who Shelters All
City of Brass
Rocky Tar Pit