This deck has developed from different versions. I had an Isochron Scepter build that utilized lots of Converted Mana Cost 2 instances. I started thinking one night after speaking with one of my play buddies that I could build an efficient burn deck using Shrapnel Blast and something like Fire Servant to increase the damage outflow. In searching for ways to utilize the Scepter multiple times I looked had Clock of omens but found Dross Scorpion to be more effective.
This is close to my full version. Its now a matter of refinement and preference. Im looking at a build of this that doesn't use Isochron Scepter and the tapping ability but a Dual Casting and Increasing Vengeance cast multiple of a Blast to burn my opponent out for 20 life.
Let me know what you think. Check out the deck on Tappedout.net