User blog comment:Rafe Adler/"Devil's Bargain" Discussion/@comment-79.115.74.75-20180209181214/@comment-1031724-20180209224457

Maybe a death-cheating spell, maybe he faked his death and tricked even God, maybe somehow Jack called him as well and he went through the same deal with the Cosmic Entity that Castiel did... I hope we find out. God said archangels are harder to revive than regular angels.