The Purge

The Purge started out as a team of Monster Slayers led by Lareina Martin and eventually Louis Bell. The Purge were formed in 1898, after Lareina Martin and several others first exorcised a demon. 
Over the years, the name The Purge is most often associated with a secret group of operatives who answer directly to G.E.N.E.S.I.S Director, Ellie Bishop. This team handles black-ops missions with supernatural targets and is comprised of some of the most dangerous criminals on Earth. The members receive one million a piece for every mission and if they fail they are killed instantly by nanites that they've ingested.