Season 13 introduces a Nephilim, Jack Kline portrayed by Alexander Calvert as the son of Lucifer. Jack would later on become a member of the Winchester family and an important ally in rescuing the people of Apocalypse World (a world without Winchesters to prevent the endtimes) and defeating Apocalypse World, archangel Michael. Jack would go on to be killed by God as part of Chuck's plan only to be resurrected by Billie, a reaper who is a newly turned replacement for Death.