I think you could go for a couple more Supreme Verdict s and a couple more Detention Sphere s. This deck is BEGGGING for a sideboard, and once one is crafted the smiters should go there immediately to make way for x1 Advent of the Wurm x1 Call of the Conclave and either another Selesnya Charm or a Sphinx's Revelation I like the wide array of answers. If you introduce a sideboard you can customize your options a bit better and make the deck more consistent and reactive based upon what you're facing.

hu... that seems legit. I may do it for an advent of the wurm, the charm and Sphinx's rev because it can combat Obzedat, Ghost Council a lil better. thanks for the advice and the pluses!