from society on the condition that he kill Sam because he'll likely intervene. Although he initially agrees, Sam is nearly killed by Dean who soon relents and kills Death instead. However, due to Sam's earlier machinations, the Mark is removed and the Darkness is unleashed regardless. Season 11 With the Darkness unleashed, Sam and Dean set out to try to find the Darkness, but are shaken to learn that the entity they are hunting is God's sister, who was imprisoned by God and the Archangels so that he could create the world. Manifesting as a human soul who comes to call herself Amara, Sam learns Dean is drawn to her from an eternal bond as Dean was the one who freed her, but matters become even more complicated when Castiel consents to act the vessel for Lucifer when he becomes convinced that only an archangel has any chance against Amara. This strategy fails- speculated to be due to Lucifer's status as a fallen archangel- but the Winchesters are eventually contacted by the true God, now revealed to be Chuck Surely, the author who wrote the Winchester Gospels, who is able to make peace with Amara and depart. Sam briefly believes Dean is dead and is kidnapped by a mysterious woman. Season 12 Sam is kidnapped by the British branch of the Men of Letters who torture him but he resists. Sam is later reunited with his brother and mother attack the Winchesters to try to take control of America's hunters and Lucifer is left on the run trying to find a new vessel. Lucifer eventually takes the President of the United States as a vessel, but the Winchesters are able to banish him from this host. While the Winchesters discover that Lucifer conceived a child while possessing the President, they are left to guard the child's mother while Mary explores the possibility of an alliance with the British Men of Letters. Although Castiel concludes that Lucifer's child is worth protecting, the potential alliance with the Men of Letters ends when the group prove to be excessively ruthless, to the point of killing a hunter, Eileen Leahy, who had assisted the Winchesters on a case because she accidentally killed one of their members. Season 13 The Winchesters are eventually able to banish Lucifer to a parallel universe where the Apocalypse took place 'on schedule', in 2012, but this plan backfired when