"You guys are trying to lock him up," Adam replied after a moment. "Trying to use the same spell that contained the Darkness. And who did you have that you could turn to? Michael. So you guys tried turning to him, discovered we'd gotten out, he answered Castiel's calls."
A snort. "Let me tell you, there's nothing quite as fun as an archangel having an existential crisis in your head. Because he really didn't enjoy being told that God was back, or that he was a complete dickbag who was trying to end it all. Finally started believing it, though. Gave you guys the spell, opened a portal to Purgatory because the one ingredient you didn't have? A Leviathan blossom. And then we took off."
He focused on his beer for a moment, as though it were incredibly interesting. "I did get an apology out of you before we left, though. For everything that'd happened."