[He sneers, his head held high on his neck. But there's a measure of annoyance in his eyes as he surveys the other angel and his ruffled feathers. Lucifer had not had much experience with Castiel, in his timeline — rare occasion, really, because he had no reason to care for Dean or the angel while his vessel was elsewhere. But he knows enough. Learned enough, in all the time they had wanted to kill the devil.

Still obnoxious as ever, though in such a different way.]

Acting a little too big for those baby bird wings, Castiel.

I know he'll fight. He'll fight, and that's why he's my favorite. But here's the thing: Sam's not going to last under that pressure for long, and even if he does manage long enough — what are you going to do? Try to dig me out of him? Destroy his mind or maul his soul in the process? How do you think Sam's going to react to two years worth of my memories suddenly pouring into him?

Especially after all the lives I took with his hands.

[He seems a bit more at ease suddenly, as if the reminder of the atrocities he'd committed has soothed the ire Castiel had inspired. He was quite good at his craft, after all. Tormenting, killing, wiping people off the map...]

Poor Sammy, he'd be completely obliterated by all those things I've worked so hard to protect him from. All those families... the children. [He sighs, looking down, sympathy dripping with blood.] So unfortunate.

[He's a monster. What did anyone expect?]