"You can't imagine what it's like. They are all inside me. Millions, upon millions of souls."

"Sounds sexy. Exit stage Crowley." He vanished silently, leaving Raphael behind. Castiel turned to the Archangel.

"Now what's the matter, Raphael? Somebody clip your wings?"

Raphael looked at him with shock. "Castiel, please! You let the demon go, but not your own brother?"

He smirked. "You see, that's where you're wrong, Raphael! Poor little Castiel hasn't been here for a while."

Raphael's eyes widened as he stepped forward, his angel blade in hand. "You! How-"

Suddenly, his voice was cut off. Raphael's body had been ripped apart from the inside out.

Sam and Dean were now staring at him, backing away inch by inch.

"Cas?" Dean was glancing back and forth between the place where Raphael had been standing and where Castiel was now.

He wore a smile on his face. "I'm not Cas. You know, I would assume you could figure who I was by now. What about you, Sammy?"

Sam's face drained of color, his mind quickly figuring out who was behind the mask. "Lucifer," He whispered.

Lucifer smiled. "What's wrong, Sammy? Scared?"

Both Sam and Dean were standing there in shock.

"How did you trick Cas into saying yes?"

"Well, I didn't really trick him..." Lucifer held up a finger, walking slowly towards them. "You see, it was actually very simple. I just had to show Castiel..."

His face was plastered with a sympathetic grin, and his arms spread out in triumph.

"...that he didn't matter at all to you. The two amazing Winchesters! Oh, and, you know. Castiel. That runaway angel. The one that fell. Cast from Heaven."

Sam and Dean both had a look of horror on their faces.

Lucifer raised his eyebrows, now leaning on a table nearby.

"Needless to say, it worked. Of course, I didn't really open Purgatory. How stupid that would've been, releasing the Leviathans!"

Even in the midst of all the fear, Sam still asked, "Leviathans?"

Lucifer waved his hand at him in dismissal. "Oh, you wouldn't have heard of them. One of the first monsters, you might say."

Sam swallowed, glancing back at Dean for a moment. His eyebrows knit together, saying a silent apology to his older brother. He looked at Sam in confusion and turned towards Lucifer.

"What, you're just going to start the apocalypse all over again?"

Lucifer held up his hands in a 'What else?' gesture.

"Well, you know me. When in doubt, go with the classics." Lucifer sighed. "I don't really need you anymore, really. I've already got a vessel."

Sam bit his lip, thinking. Then he made his choice.

"Well, that's a good thing. Because I'm already taken."

Lucifer's eyes narrowed in confusion. "What-"

Sam looked up at the ceiling, nails biting into his palm. This was a choice he never thought he would make. But here he was. He clenched his jaw in resolving of his decision. "Yes."

The room started to quake, things falling off tables and crashing to the ground. A bright glow in the center of the room grew until they were all blinded.

Everyone but Sam turned away from the brightness, a silvery flood of light streaming into his body.

They turned back when the glare suddenly just blinked out like someone had just shut it off.

The tables were back in the same place as before, and the instruments were all fixed. Not a single one was broken. It was like nothing had happened.

But now, Sam's eyes were glowing bright blue with grace.