Vlasiax: THanks for having a look! I appreciate your input! As an avid Black player I love Cabal Coffers; however, there are two issues with running it in this deck. First, I haven't included any way to reliably get both Cabal Coffers and Urborg, Tomb of Yawgmoth at the same time. This ties in with my second issue, which is that there are only ten lands in the deck with the swamp subtype. For Cabal Coffers to be efficient, you need a minimum of four swamps in play. Those two factors are the primary reasons why I haven't included Cabal Coffers in the deck.

As for land count, its mostly out of my own frustration more than anything else. For a long time I ran 37 lands (I think), but nearly every game I would get mana screwed. I'm talking like four out of five games I'd miss the majority of land drops. I have no real explanation other than a run of REALLY bad luck, but I was fed up with it so I upped my land count. With Mardu having so little access to ramp, making every land drop is crucial. The increased count has helped, and I feel more comfortable that when I do miss a land drop, it's just bad luck and not a flaw in deck design.

Finally, let's talk about the search lands. I already run all of my on-color fetches. I have had lots of discussions with my friends about the merits of running off-color fetches. In the first three or so turns of a game they provide superior mana fixing compared to a basic land; however, I personally don't feel that the minor increase in mana fixing warrants the increase in monetary cost (particularly when I'm trying to foil out the entire deck). As for Evolving Wilds and Terramorphic Expanse, they play like slow lands, and I've done my best to remove any lands that enter tapped without any way to work around it.