Cool deck! I might make something like this except I play standard. However, since you only splashing black, I would probably not run as many multicolored lands. Maybe take out 3 of the Caves of Koliloses and replace them with plains.

Take out Launch the Fleet , Precinct Captain , Elspeth Tirel , lower your anthems to only 4-5, take out Temple of Silence and City of Brass as well. Launch the Fleet is something I expiremented with myself, but I found that it just wasn't as good as I had hoped. When it worked it was great. But it lacked consistency. Elspeth Tirel should be replaced by Elspeth, Knight-Errant . Precinct Captain doesn't belong, it's not good for the curve. You need 4 Thoughtseize . I would also recommend throwing in an additional 2 Inquisition of Kozilek . Your sideboard also needs a lot of work. What is your local meta? Take a look at my deck for ideas if you so desire. Swarm and Conquer V 2.0