These heretics believe, according to a prophecy depicted in an oracle drive, that the savior, a woman with rose-colored hair, will die at the hands of the Shadow Hunter.
The Shadow Hunter turns out to be Noel Kreiss, who had spent many long years living in Luxerion's shadows, but he has no ties to the Children of Etro.
Lumina had shown him a prophecy in an oracle drive in which he kills Lightning, and then is able to live happily in a new world with Yeul.
Noel lures Lightning to a secluded area of the warren where he can carry out his plan to kill her, but ultimately destroys the oracle drive depicting his happy future instead.
She is told in no uncertain terms that the world will end in thirteen days, and there is nothing she can do to stop it.