Castiel woke up. He's body was stiff and sore. He let out a soft groan as he stretched his body.

"How you feeling, Cas?" Dean called

Castiel turned his head to see the Winchester brothers sitting at a little kitchen area in the back of the room. "Morning." He grumbled as he climbed out of bed. He walked over to them and stretched again. "I feel okay other than stiff." He noticed the two of them staring at his wings. "Sorry." He said sending them to the ethereal plane. He sat at the table then he stretched and yawned. "How long was I asleep?"

Dean chuckled. "A whole day."

Castiel looked shocked. "Oh… guess my ordeal must have drained more of my grace than I thought."

Sam offered Castiel a cup of coffee.

"Thank you," he took the cup, "Have you heard anything about Alacastor since I was… asleep." Castiel knew that his grace needed to be recharged but he was still ashamed he slept for that long.

Dean shook his head. "Nope, not a peep. I called Crowley he doesn't know anything either. But he's supposed to keep in touch."

"You really trust that demon?"

"Hell no. But I figure he's looking for him and so are we so why not 'work' together."

Sam added in. "We haven't learned anything about the spell either." He rubbed the back of his head. "Us and Bobby have been researching for spells that call for angel feathers and nothing has come up."

Castiel furrowed his brow. "There are several spells that call for angel feathers. Typically its powerful magic." He picked up his coffee.

"Well someone has to know about it." Sam said

"I think our best chance is to find those hunters that were with him." The angel said

"Yeah Bobby wanted to know if you caught their names?" Dean asked

"Ella and Chris. They were related…" He frowned

"What's wrong?" Dean asked

The angel shook his head. "Apparently… one of their family members was used as a vessel... and they died."

Dean shrugged. "Not your fault man."

"Yeah Cas that was someone else." Sam said

Castiel frowned and rested his elbows on the table. "I know but…" He shook he's head. "They called me a monster." He's voice sounded sad as he said that

"Oh Cas," Dean said sounding pained. He rested he's hand on his friend's shoulder. "You're not a monster."

"Yeah Cas, don't' worry about them they don't know you." Sam said. He patted angel's arm. "I'm going to call Bobby and tell him the names of those hunters." He got up from the table and walked outside the motel room.

"Dean," Castiel started. "Thank you… thank you for everything."

Dean gave a faint smile. "Of course man. You're my friend." He looked over Castiel's arms. "You good? Or is it still healing?" He asked gesturing to his arms

Castiel looked over his arms. "Still healing some. They don't hurt as bad as I thought they would."

Sam came back in the room. "Bobby said he's going to call around and see what he can learn. He also has a case for us."

"Case?" Dean asked looking up at him

He nodded. "The next town over there's apparently a haunting at a library. No vengeful spirit yet but someone called Bobby to look into it."

"Sounds like an easy job." Dean got up from the table. "Let's go."

The three of them were in the next town over. Dean eased the Impala in a parking spot at the front of the library.

"So this librarian knows Bobby?" Dean asked as he turned off the car

Sam nodded. "Yeah apparently he saved her several years back from a Windingo."

Dean chuckled. "Well hopefully she actually has a ghost and isn't just looking to see Bobby." Dean said as they got out of the car.

"Are we going to be the 'FBI' again?" Castiel asked. He even used air quotes for the term FBI

Dean rolled his eyes. "Stop it with the air quotes man."

"No Cas we are just going to be us since this lady already knows Bobby." Sam said then added. "Just no telling her you're an angel okay."

Castiel tilted his head. "If we are being ourselves why would I hide that I'm an angel."

Both brothers sighed. Dean patted him on the shoulder. "No not today we'll go by your other title hunter in training."

The three of them walked into the library. For a small town they had a large library. They made it up to the desk and an older woman was sitting behind there looking at her computer.

"Can I help you gentlemen?" she asked not even looking up from her screen

Sam spotted her name bandage and realized she was the lady that Bobby had gotten the call from. "Uh Bobby Singer sent us."

That time she looked up at them. She looked over her glasses reminding Dean of a teacher he had in elementary school. She looked the three of them up and down like she was assessing them. She grinned a smile that made Sam nervous. "Well…" She said pushing away from her desk and standing up. "I asked for Bobby and I'm liking what I got instead." She looked Sam up and down again.

Castiel leaned over to Dean and asked. "Why is this lady staring at us like she's going to eat Sam?"

Dean laughed and whispered. "Because she would."

"Shouldn't we help?"

Dean patted him on the back and could tell Sam rolled his eyes at them even though he was faced away from them.

"Yes uh, Debbie. Bobby sent us to help with your ghost problem." Sam said smiling politely

"Three of y'all though?" She took her glasses off and shook her head.

"Please can you tell us more about it?" Sam asked

"Not much. Just at night the ghost tosses books around. I come in the morning and half the books are on the floor." She waved her hand around the library. "This is a big place and it's a pain to clean it all up every day."

Dean smirked. "Sure it's a ghost and not some kids coming in and getting wild.

"Well the first time I thought it was a prank. Teenagers you know, they have no use for books now that they can get everything on their phones." She pointed to a camera. "However unless they can turn invisible that ain't possible. We checked the cameras and all we see are books flying off the shelf."

Sam nodded. "Okay we'll take care of it. Can we come back tonight and see what's going on."

Debbie nodded and handed them a key. "Just lock up after yourselves. I'll delete the photogate in the morning so no one will know you just got in."

"Thanks."

The three of them headed back to the car. Dean went on a hunt for a motel. "Seems like a pretty easy case. I could have stayed home." He said with a laugh

"Yeah I guess it isn't much." Sam said. He turned the key over a few times in his hand. "Guess we'll stop this ghost before it gets started."

Dean spotted a motel and a dive bar across the street from it. It wouldn't be long until the library closed and it would be night. "I got an idea. I'm going to hit the bar and you take out the ghost."

"Really Dean you're going to go to a bar while a hunt is going on?" Sam retorted

Dean rolled his eyes. "For goodness sake it's a ghost messing up shelves at a library. This job is cake. Take Cas and we'll call it training."

Sam frowned at him. The three of them got out of the car and unloaded everything in the motel.

Sam packed their gear for the hunt. They had already taken Castiel on a ghost hunt before so this was nothing new to the angel. Once they were ready and night fell the two of them headed to the library in the Impala.

The two of them made it to the library. The headed on in and Sam was glad the librarian had given him a key. This made things a lot easier.

"Now Cas it might take a while before the spirit is active. As you know we need to find what is tying them to this place." Sam said as he pulled out his shot gun loaded with rock salt. He tossed Castiel the other gun.

Castiel frowned at the gun. "This is unnecessary Sam I simply can take care of the ghost with my powers."

Sam nodded. "I know but you never know there may come a time when you can't use them."

The angel frowned. Sam had a point there was always a time when he's grace could become so used he wouldn't be able to use his powers. He knew that eventually that day will come ever since he left heaven. One day he'll be useless.

"I didn't mean anything about it." Said Sam as he seen how crestfallen Castiel's face had become. "We just need to be prepared. Especially if you are going to stay with me and Dean."

Castiel nodded. He had no intentions of leaving the Winchesters. He needed to learn what he could to be able to defend himself.

"You remember how to use the gun right?"

He nodded. "Yes Dean showed me."

Sam chuckled. "Well Dean is good for some things."

Castiel tilted his head. "Are you upset with Dean over going to the bar?"

He shook his head. "No I mean I don't know." He gestured to the angel. "He was all into teaching you the trade then today he's not… we don't even know anything else about that spell that was cast on you either."

"You don't trust me?" Castiel asked. He could understand that. They didn't have any information on the spell that Alacastor had used on him or how it will affect him.

Sam went to speak when suddenly a book flew off the shelf. "Look out!" He yelled. He turned to the shelf peppering it with rock salt. The ghost screamed and vanished. The ghost looked like an old librarian.

"Leave my book alone!" The ghost called

"It must be attached to a book!" Sam exclaimed. Now with that information he wondered what book it was.

The ghost suddenly reappeared behind him. "Sam look out!" Castiel yelled as the ghost tossed the youngest Winchester into the book shelf. It charged at Castiel on instinct he reached out and summoned his grace and smite the ghost. He ran over to Sam. "Are you okay?" He asked helping him out of the book shelf.

"Yeah I'm fine. What about you?" Sam asked as he took his hand and let him help him up.

"I took care of the spirit." As soon as he said that he felt a burning sensation in his grace. "Ugh!" He cried out. He doubled over as soon as the white hot pain started.

Sam grabbed onto him trying to hold him up. "Cas was wrong?"

"It hurts." He said through gritted teeth

"What hurts?"

"My grace we… you need to get me back to the motel I think."

Sam was worried about his friend. He helped the angel to the car and helped him get in. He took off back to the motel. He'd call Dean once he got there.

Dean on the other hand was at a nearby bar. There wasn't a lot of people there and even less women so Dean wrote off getting lucky tonight. He sat at the bar and smiled at the waitress as she took his order. He's drink was in front of him before he knew it.

"Hello Dean."

He turned to look and see Crowley sitting beside him. "Crowley to what do I owe the pleasure?" he asked in a snarky tone

The demon waved to the bartender and ordered his own drink. "Thought I would give you an update on my progress," He took the drink and smiled at the woman. "I haven't found Alacastor yet. But I might have an idea on the spell he used." He took out an old folded piece of parchment paper. "There's lots of spells that call for angel feathers and blood." He pointed at one spell. "This one is a nasty piece of business. You see it makes creatures revel their true selves. Use it on a vamp then fangs, on a demon you get black eyes and on an angel."

"Wings." Dean stated as he took a drink. "So what does this have to do with Cas?"

Crowley frowned. "This spell doesn't seem to do harm it actually wears off after a while. It's the one that's with it that might be a problem. See these spells are in a set they haven't been used in ages. Rumor has it; it was created to harvest creatures." He's figure pointed to the spell after that. "This one is to control harvested creatures." Then the next spell, "And this one is the nastiest of the bunch after harvesting a set number of creatures this one can… let you control any and all creatures."

Dean almost choked on his drink. "What? There's spells like that?"

"This is pre-hunter spells. More than likely they were created to defend some small city state somewhere. Lost to the ages they were." He said with a smirk

"Let me guess demons heard about it and took the stuff so it couldn't be used on them."

The King of Hell smiled. "And here I thought it was hidden pretty good, Alacastor must have found it. Shows you I should be more careful as to whom I let clean the archives."

"You guys didn't think to destroy this thing?"

He shook his head. "No I mean we could use it ourselves… I actually didn't know about it until today. It was hidden pretty well. Nasty bit of spell work. Where is feathers anyways?"

"On a hunt with Sam." Panic shot through Dean. "Wait the control spell."

Crowley shrugged. "If you're lucky Alacastor didn't use it. For all I know he just got the harvest spell and went into monster harvesting."

"Yeah but if he did my brother is alone with Cas right now." Dean reached to his phone when it rang. He saw Sam's name pop up and he felt a pit grow in his stomach. "Sammy what's up?" He asked as he answered

"Dean! There's something wrong with Cas. He started having pain after we ganked the ghost. I took him back to the motel and…"

Dean heard silence on the other end. "Sam?" he asked the feeling of dread worsened. He couldn't hear him completely he heard Sam speak.

"Cas don't get up." It was faint like Sam had turned from the phone.

Dean laid his money on the bar for his drinks and started to get up. He had to get to Sam and Cas and fast. He kept the phone to his ear barely noticing the King of Hell following him out of the bar. "Sam." Dean said again. Then after that the sound he heard sent him into a sprint back to the hotel. He's brother screaming and yelling: Cas no don't.

Dean charged to the motel as fast as he could grateful the two were close. Crowley was standing by the Impala and Dean looked at him.

"Demon remember who needs to run when you can teleport." Crowley said

Dean stormed into the motel room almost ripping the door down. The sight before him would be one he won't soon forget. Castiel stood over a bloody Sam holding him by his shirt. Sam had his hands up trying to defend himself.

"Cas?" Dean asked. The angel looked up at him. His normal vibrant blue eyes were dull and wild looking almost like a wild animal. "Don't," He looked at his brother. "Don't hurt Sam."

Castiel looked down at Sam and let go of his shirt making the younger hunter hit the ground with a thud. The angel started to walk towards Dean

Dean held his hands up. "Wait Cas don't!" He yelled. He backed away from him and into a wall

Castiel balled up his fist and let out a growl like a wounded animal.

"Castiel don't please!" Dean screamed bracing for the beating of his life. Castiel had beat him pretty bad back when he thought about being Michael's vessel so he knew it would hurt. But he wasn't hit instead he heard.

"Dean? What happened?"

Dean lowered his arms and looked at Castiel. The angel was standing there looking confused. "Cas is that you in there?"

The angel frowned. "I think so I…" he looked over at Sam. "Sam!" he yelled he ran over to the youngest Winchester.

"No don't!" Sam cried out. Castiel laid his hand on his forehead healing up the damage he had just done.

Castiel stood up and looked around. "I'm sorry I wasn't myself."

Crowley stepped into the room about that time. "I see Alacastor does want you boys dead." He looked at Castiel. "Had to wait outside you see didn't know if you had your blade."

The angel frowned again and looked at his hands. "I hurt Sam."

Dean reached up and took Castiel's hands. "No, no you didn't that bastard Alacastor made you hurt Sam."

The angel looked at Sam and noticed that the young man flinched. Castiel shook his head. "I can't its… it's not safe to be around me." He pushed Dean away from him and with a flutter of wings he was gone.

"Cas!" Dean called. "Damn it Cas!" Dean looked around then made his way to Sam and helped him off the floor. "The hell happened?"

"I don't know. I put him to bed when I got back and when I called you he got up and went after me." Sam shook his head then felt his face checking for damage. "Dude he tried to beat me to death."

Dean frowned. He was worried about Cas and he wasn't happy that Sam got hurt. He looked up at Crowley. "Any way to reverse the spell?"

"Well there's a few; you could kill feathers,"

"No!" Dean shouted. He glared at the demon. "We ain't killing Cas."

Crowley rolled his eyes. "See that's the easy way. You can kill Alacastor. But we got to find him first or the last one… you can put Cas under you're control."

"We are killing Alacastor." Dean said

"Suit yourself then. If you decide to change your mind you have my number and I have yours." Crowley said then vanished

Dean looked over at Sam. "We got to find Cas."

Sam nodded in agreement. "Yeah before he hurts someone else." Dean didn't like Sam's tone. He narrowed his eyes at his brother but kept his mouth shut.

Dean fished out his phone to call Bobby and tell him what happened. They were going to make a trip to Bobby's at times like this he needed to depend on his father figure to help him work through all this.

Castiel stood on a hill overlooking the town. He hated leaving them like that but it was the best course of action he could think of. He couldn't risk losing it again and hurting or worse yet killing one of them. He frowned he could hear Dean's prayer his longing for him to return to them to him. Castiel frowned and balled his fists. "I'm sorry Dean I can't come back and risk hurting you." The angel realized something very fast he had to find Alacastor and kill him to reverse the spell. He couldn't pick up on demons like he could humans. He let out a small sigh and concentrated and searched for the humans that were helping the demon. Finding his answer he went to track them down. He felt Dean's prayer again begging for his return offering forgiveness. The angel smiled to himself. He felt guilty for leaving but he knew it was for the best. He spread his wings that were invisible to the naked eye and took off. He would take care of this himself.