Hell on Earth - Taking Back the Wasted West
Doomsayer
Doomsayers are mutants who wander the west preaching the end of humanity and the rise of the mutants. Through training and devotion they have gained power over the radiation that suffuses the Wasted West and can wield it to heal, to hurt, to protect or to seriously wreck shit up.
Some are members of the Cult of Doom led by Silas Rasmusson based out of Lost Vegas. These guys are identifiable by the green robes they wear and their tendency to kill non-mutant humans on sight.
The Schismatics wear purple robes and believe that the next era will come with the arrival of the harbinger and that there is no need to hasten things along with the bloody murder of the previous generation.