"It wasn't my fault. Sam and Castiel did a spell to remove the Mark of Cain from my arm and it released the Darkness. Then Sam started getting visions he thought were from God but were actually from Lucifer because when Amara got free she damaged the cage. So Lucifer tricked Sam into coming to talk to him and then Rowena double crossed us and somehow me, Sam, and Cas wound up in a cage containing a fragment of Lucifer's essence or something like that. Well we all kind of got our asses handed too us but before we could get out or reseal Lucifer Castiel said 'Yes' and Bam, free archangel."