He finally found the last one, Abaddon, who was still inside Colette. They both carried the same bloodline that could host the archangels. This could also be as he knew killing all those demons would permanently make him fall into the Mark's influence and thus he was warning Dean he would have to be killed and also because he didn't want to kill as many as he did before. This page was last edited on 10 October 2019, at 02:19. Cain therefore killed him, using an animal's jawbone (which became the First Blade), marking his legacy as a killer and "the Father of Murder.". He admitted to Dean that he really did care about him and explained that Dean was doomed to lose control of the Mark just as he himself had, and would eventually murder Castiel and then Sam, the latter of which would destroy him and leave him a monster as such, by killing Dean, Cain was sparing him from this fate. Furious at what they had done, Cain picked up the First Blade and slaughtered all the Knights of Hell (and all the demons helping them), leaving him even more feared by all demons. His father is a former railroad man and his mother was a teacher. After killing Abel and receiving the Mark, it began to turn him into a killer. As shown when Dean killed Abaddon, the First Blade creates an effect similar to Cain's smiting ability when killing a Knight of Hell. as long as I was the one who sent Abel to Heaven. Crowley asks for Dean's help in finding a weapon known as the First Blade, which reputedly was used by the archangels to kill the Knights of Hell, and is the only weapon which can kill Abaddon. Cain was initially unwilling to help and sent them away, warning them to never return. Supernatural Cain appears as a minor character in Neil Gaiman's The Sandman. Meanwhile, one of Abaddon's followers managed to track them down and, realizing what they were dealing with, called in Abaddon's army before they progressed. While telling them that the devil's trap can't contain him long, Cain admits that its a clever trick and seems to be genuinely impressed with the move.
When Lucifer tried to corrupt Cain's younger brother Abel, Cain made a deal so that Abel's soul would go to Heaven and in exchange Cain's would go to Hell.