reaperduction
A "false profit" --- I mean, "prophet" --- who goes around impersonating "Da Grim One" in an effort to con hapless believers into converting to his religion, giving him what he wants, etc.
Warren Jeffs was an infamous example of a "reaperduction" in dat he went around spouting "doom 'n' gloom" sermons in order to unreasonably force his followers to bow to his will and do his bidding.