The blue in Sam's eyes faded, leaving only Lucifer to see it, as Dean was standing on the side.

"Sam? Are you okay?" Dean asked.

Sam's posture was stiff and tall while looking at Lucifer with a cold and quiet hatred.

Lucifer was no longer leaning against the edge of the table. Now, he was standing fully upright with his angel blade in hand.

"I'm assuming you found your chance to escape when I did, dear brother. I see you stole my vessel."

Sam's jaw clenched, summoning his angel blade.

"Castiel should never have listened to you, Lucifer. He was manipulated."

Lucifer raised his eyebrows. "Oh, Michael! Don't you know that's what I do?"

Dean was watching this exchange, but now he turned to Michael with horror. "You possessed Sam!?"

He bit his lip. "I assure you, he was never my intention."

Lucifer eyes narrowed. "Oh, you've changed. What was it? Torturing little Sammy? Ripping the flesh right off his bones? I wonder."

Michael glared at Lucifer, stepping towards him with his blade ready. "Do not presume what I think or know, brother. Leave us be."

Lucifer would have fought, right there and then, but he had plans. Big, big, plans. And he didn't need the Winchesters one bit.

"Is that so?" He sneered. "Have your wish, then." He vanished, leaving a furious Michael behind.

Dean turned to him, fury evident in his expression. "Now let my brother go."

Michael winced. "I am afraid I cannot do that, Dean."

"Why the hell not?! Just stop possessing him!"

He shook his head. "It is not that simple. While I am possessing him, he is healing."

"Healing?! What the hell do you mean, healing?! It's simple!"

"Not his body, Dean. This time, it's his soul."