"Lucifer is back in the cage," Chuck said, when the vision had passed.
"Yeah, I know that," Dean said.
"That's not all. With Lucifer in the cage, a new leader will arise."
"I should have known it couldn't have ended that easily. Who's the new leader?" Dean asked. He figured it would be some high-level demon. Last year his money would have been on Alistair or Lillith, but they were both dead, thanks to Sam.
"You're probably not going to believe this, but it's Castiel."
"What? What's he going to be the leader of?"
"He's taking over for Lucifer. That's the reason he shoved him back in the box. It's been his ambition all along."
"He's with Sam," Dean realized.
"He needs Sam to rally the demons around," Chuck said.
"How's that going to work? Last I checked demons hated Sam. The only reason they didn't kill him was because Lucifer wouldn't let them."
"Sam's psychic abilities are much more than we realized. He can actually control demons minds."
Dean realized that made sense. He remembered Sam telling him how Ava had summoned and controlled an echeri demon. Those demons were known for being vicious and cruel and not listening to anyone.
"Well, he's not going to go along with that," Dean said, remembering how Sam had been denying the devil. Cas was nowhere near as strong as the devil.
"I hope not," Chuck said, but based on what he had seen, he wasn't sure one way or the other.
SSS
"Where are we?" Sam asked, looking around. This wasn't Bobby's panic room unless he had done some major redecorating.
Castiel handed Sam a jug full of demon blood that he had collected a few days ago. "Here. Drink this. It's angel blood. It dispels the effects of demon blood," Castiel lied.
Sam took it and chugged it. "Hey, that was demon blood," he said when he had finished. He had noticed while he was drinking, but that just made him want to drink it all the more.
"Sam, do you know what you can do when you're high on demon blood?" Castiel asked.
"Exorcise demons."
"You can control demons. You're going to control them for me."
"Why would I do that?" Sam asked, realizing that Castiel was not who he thought he was.
"Because I can do things for you that demons can't. You control the demons for me, I do these things for you."
"Like what?" Sam asked.
"I can bring the dead back to life. Your father, mother, Jessica. Dean dies a lot. I can bring him back as many times as you want."
"If there's one thing I've learned, it's that what's dead should stay dead. If Dean hadn't brought me back that first time, none of this would have happened."
"Have it your way, Sam. But you're not leaving here…ever." Castiel left Sam, so he could think that over. He would give him demon blood every day. Sooner or later, the evil would overcome Sam and he would agree. The mansion was fortified so that nobody with demon blood could pass through the walls without angelic assistance. Sam was truly trapped for good. So, even when he did agree to help, he wouldn't be able to double-cross Castiel without signing his own death warrant.
SSS
Dean and Bobby were at Bobby's trying to figure out where Castiel took Sam. Dean's phone rang and he looked at the caller ID.
"Do you know something, Chuck?" he asked.
"I saw where they are," Chuck said. They're in a mansion in Santa Barbara." He gave Dean the address and hung up.
"Chuck told me where they are," Dean told Bobby.
"Let's go," Bobby said.
"Maybe you should stay here." Bobby was pretty tough even in his wheelchair, but Dean figured the place was crawling with demons. He didn't need to worry about Bobby while he was trying to rescue Sam.
"Fine," Bobby grumbled. He hated feeling so useless, but now was not the time for a pity party. They needed to get Sam back and fast.
SSS
"Here's your breakfast, Sam," Castiel said and handed him a jug of demon blood.
"How do you get this?" Sam asked between swallows.
"Do you think demons are any match for an angel?"
"I thought you were cut off and had lesser powers," Sam said after he swallowed the last bit. He already wanted more.
"That's what I wanted you to think."
"Can I have more?" Sam asked.
"Are you ready to do my bidding?"
Sam hesitated. He wanted to say yes. Whatever it took to get more. But Dean had said that he was proud of him and he didn't want to disappoint him again. OK, he would probably be disappointed by the fact that he was drinking the blood, but he could at least not help Castiel take over the world. He shook his head no.
"Then you'll wait a week for your next fill up," Castiel said and began to slowly leave the room, hoping that Sam would stop him.
Sam wanted to stop him. But he didn't. Castiel was surprised, but knew when he returned tomorrow empty-handed, Sam would be ready. There was no way he could go more than 24 hours without a hit now. He could see the desperation in his eyes. Sam was stronger than a lot of people gave him credit for, but he was only human. Not even just human but demonically human. He was destined to fail.
A/N: Please don't hate me. If we can have evil Sam once in a while, why not evil Cas.