Hey I'm Back in Black and ready to write! (Sorry couldn't resist saying that). Right, on with the show. By the way, I know the 5th season has already started and all, but I don't have a clue what happens, so I'm changing the ending of season four slightly to fit in with the story. I hope you like it. I love how this story is going, and I'm really proud of it, so please take time to R+R. This was going to be the last chapter, but I've decided to do another one after this, which will be the last one!

Dean ran down the hallway calling for Sam the whole time. What he didn't expect was to walk round a corner and run straight into Castiel's back.

"Cas?"

"Hello Dean. I thought you may need my help."

Dean looked at the angel with gratitude. As he stepped forward, he heard footsteps heading towards them from behind, and spun round, pointing the gun he held straight at the newcomers, but his eyes widened to see it was Bobby and Kerry.

"Kerry? How are you even able to stand?" he asked in surprise.

Kerry gave him a lopsided grin.

"I may be standing, but believe me, it's hard and I feel like I'm gonna pass out at any given moment." She answered honestly.

Castiel stepped forwards, and she looked over at him in confusion, and as he raised his hands to place them on her head, she quickly stepped back and raised the handgun so that it was pointing at his head.

"Bullets won't work honey. He's an angel" Dean stated.

Kerry's jaw dropped as she regarded the angel.

"Is this Castiel?" she asked.

Dean nodded, and she smiled at him, then turned to face Castiel.

"Please trust me" Castiel said.

She gave him an unsure nod, and he placed his hands on either side of her head. A soft glow filled her body and she blinked in surprise as she felt a rush of energy flow through her. When Castiel lowered his hands, she glanced down and her eyes widened further to see that her wounds had vanished.

"Your minor wounds have healed, but the stab wounds are only healed on the outside. On the inside they are still very raw so you must be careful."

"You make it sound like you aren't coming in with us" Dean said.

"I cannot enter the main room where Lucifer will be summoned. There are spells in place to prevent angels from crossing into the domain."

Dean swore, before reaching out and grasping Kerry's hand, pulling her gently to him as he began to continue moving down the hall. Bobby followed, and Castiel watched them go, silently wishing them luck. Kerry looked back at him once and sent him a small smile, showing him not only how grateful she was, but also how scared she really was. Castiel smiled back very softly for a brief second, and Kerry felt her courage increase very slightly.

Sam had followed Ruby into a large room with a seal across the floor, and with a sickened feeling in his stomach, he saw that a section of the floor was glowing the same colour that the seal in the other room had done, and he knew it was Kerry's blood. He glared at Ruby and launched forward, catching her off guard. He slammed her against the wall before pinning her against it and raising his arm, revealing her demon slaying blade. Her eyes widened slightly in fear, but before his arm could drop to finish her, the door slammed open and Dean, Bobby and Kerry ran in.

"Sam! Stop!" Dean yelled.

Sam paused and he turned to face his brother with a look of confusion.

"Why should I Dean? After what she did to us and Kerry?"

"Sam, she's the final seal. You kill her now and the end of the world will be your fault." Kerry called up.

Ruby laughed and glanced over at Kerry, who glared at the woman in return.

"Well, it seems I underestimated your strength. I thought for sure you'd be dead now."

"Yeah, well, luckily for me I have angels on my side."

Ruby's smile turned to a frown and she glared fiercely at Kerry. This time it was Kerry's turn to smirk, and she nearly laughed when she heard Dean's snort of amusement from next to her. As Sam bound Ruby to the wall with a spell, Bobby started to draw charms on the floor, covering the seal that held Lucifer. Kerry moved out of the room and headed to find Castiel, who was standing right where they had left him.

"How do we destory the seal?" she asked.

"Do you realise that you're the first person to even think about asking me that? You'd think it was the obvious thing, wouldn't you?"

Kerry laughed at that, liking Castiel more and more as she spent more time with him.

"Yeah, but my dad and Dean don't work that way."

Dean finished spraying a symbol across the seal and looked up to see Sam still holding Ruby, Bobby writing on the floor, and Kerry...had gone.

"Kerry!" He called.

Automatically, everyone turned to look towards him, and they all began to realise she had indeed gone. She came back a few seconds later though, limping slightly, but with a wide grin on her face.

"So, now you've frozen the seal, what are you going to do?" Ruby asked them sarcastically. "Only an angel can destroy the seal, and as no angel can get close enough to do it, then that means you're stuck"

While the three men all looked surprised, Kerry walked forwards until she was standing in the middle of the seal. She took her mobile out of her pocket and called someone, ignoring the looks of confusion on everyone's, including Ruby's, faces.

"Ok, fire away. What do I do?" She asked.

There was silence for a moment as the person on the other end of the phone spoke, then Kerry nodded and placed the phone on the floor before stepping forward and walking over to Dean. She said nothing and ignored his questions as she used his dagger to cut off some hair. She did the same to all the others including Ruby before taking some of her own hair and returning to the center of the room. She dropped the hair on the floor, scattered around her, before using the dagger to create a large cut down her arm, and holding it out, letting the blood collect for a few seconds. She crouched down and did something with her phone.

"Ok, fire away" She said.

She stood up again and turned her arm so that the blood dropped onto the seal, mixing in with the hair, and turning the glow from a crimson red, to a pure white. A voice came from her phone which had been put on loudspeaker, and as they all recognised the voice, the three men simultaneously grinned, and Ruby cried out, trying to free herself from Sam's bond, a murderous look on her face that was aimed directly at Kerry. Kerry stepped back, away from the seal, into Dean's awaiting arms. Dean wrapped his arms around her and kissed the top of her head as Castiel began the incantation to destroy the seal.

"Good work"

"Well, she said Castiel couldn't enter here, but I could, and so could my phone. They also needed angelic blood to close the seal, and it turns out that my mother was a fallen angel- one that had stayed pure of heart- and so my blood works just as well as any other angel."

Dean looked at her with pride shining in his eyes, and Bobby came over to put an arm round her, trying to hold back his tears. He always knew there was something more to his wife, but it wasn't until now that he finally knew what it was. Kerry moved away from the pair of them, and grasped Sam's shoulder.

"Sam, go over to them. I think Dean knows you need him right now."

Sam nodded and made his way over to his brother. Kerry faced Ruby.

"You know that this seal breaks your bond don't you? You know that we're going to kill you, but because it happened while Lucifer's seal was in the same room, it means that he will never rise, and you will never get out of Hell too, don't you?"

Ruby's glare confirmed Kerry's statement, and as she threatened to break out of Hell to kill her, Sam and Dean stepped forward to put an arm each round Kerry.

"And we'll be ready for you" Sam stated.

Dean looked at Ruby.

"Pass a message onto Lucifer for me. He killed mom and dad, Jess, and Kerry's mom, dragged me to Hell, virtually turned Sam into a demon, made Kerry miscarry and tried everything he could to break us up, but it didn't work. Tell him we aren't afraid of him, and that any time he wants to destroy us, he's more than welcome because eventually, we'll find our way back to each other. Nothing breaks the Winchesters up. Not demons, not Hell, not even death. Nothing. You tell him that, and you tell him that together, we will beat him."

As he finished speaking, Castiel's chanting stopped and the room was silent for a few seconds, before Ruby suddenly let out an ear-piercing scream as thick black smoke left her body. The group watched as the smoke swirled around before being ripped to shreds and disappearing beneath the floor. The seal began to glow brighter and brighter, until they all had to look away. Kerry smiled as she felt Dean cover her with his arms to protect her vision. Suddenly there was a large blast of energy that threw them all across the room, and Dean wrapped his arms round Kerry as they fell backwards. They landed heavily on the floor and Kerry gasped as the wind was knocked out of her. The floor began to vibrate, and Kerry cracked one eye open to find that the room was now in pitch darkness.

Suddenly, she felt the floor begin to crumble and she screamed as she felt her legs fall so that they were hanging off the edge. Slowly, the rest of her body slid too until she was holding on by her arms. She heard her dad call out to Sam, but silence was all that responded. The floor stopped crumbling, but the vibrating continued as rubble fell from the ceiling. Kerry felt her arm slip and screamed again. She felt someone grasp one of her arms, but a shudder caused the person's grip to slip, and the next thing she knew, she was falling...