Jarno Sebastian Elg (born 1975) is a Finnish Devil-worshipper, who was sentenced to life in prison for murdering a 23-year-old man, eating some of the body parts and instigating others to participate in a ritual that included torturing the victim while listening to songs from The Cainian Chronicle album by Norwegian black metal band Ancient on November 21, 1998, in Hyvinkää. Elg's partners were 17-year-old Terhi Johanna Tervashonka from Järvenpää, 20-year-old man from Mäntsälä and a 16-year-old boy from Kerava.