Being impermeable to creature removal and removing creatures sure are great traits, but one the other hand it is a slower than Guttersnipe and inconsistent since you require Past in Flames to do anything with it. It also leaves you completely vulnerable to grave hate, and IMO one of the strongest arguments to be made in favor of Guttersnipe is that the deck still functions through grave hate.
Still worth exploring, though I think dealing with Leyline of the Void and Rest in Peace is a issue that pops up. Maybe add
Fragmentize to the wish board?
Also, this is could be a bad idea, but if you're going to go all in on Past in Flames + Burning Vengeace plan why not give
Catalyst Stone a try? Could replace the 1-of Helm of Awakening.