OK. So, I've been trying to come up with how Castiel would get his revenge on Anna. This has been plaguing me for weeks and I hadn't been able to come up with anything, even after I finished the last chapter! Finally, I had a moment of inspiration on the car ride home from Maryland (gotta have something to do on a 10-hour car ride!).

WARNING: This is not Castiel at his most warm and fuzziest. This is very dark, angst-ridden Castiel. It's violent. It's graphic. This actually came to me after seeing a video on YouTube from a Convention in Australia where Misha Collins talks about his experience shooting the movie Karla. He talks about how he amazed he was at how he was able to become this dark, evil person and how he thinks everyone is capable of doing really unthinkable things if really given the opportunity. So, I thought about what would Castiel do is he was given an all-access pass to do whatever he wanted to Anna for everything she's done and, well, this is what I came up with.

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Chapter 18

Retribution

Anna stared at Castiel, her former confidence evaporated. Her eyes were wide with shock and terror. Her body rigid, frozen with fear.

"What… why…" She stammered fearfully.

"You know what those shackles are, Anna," Castiel stated calmly. "They are inscribed with a binding spell. Your powers are now useless. But… you already knew that."

Anna slowly backed away from him, desperately pulling on the shackles in a vain attempt to remove them.

"You know that is a waste of effort, Anna."

"Castiel… please…" She attempted a weak smile. "I… this… this has all been a… a misunderstanding… a mistake…"

Castiel slowly stepped towards her. "A mistake?"

She nodded desperately. "Yes… yes… please… take these off of me and we… we can talk…"

His gaze traveled from her frightened eyes to the shackles on her wrists. He ignored her words.

"Terrifying… aren't they? Those shackles.... It's a horrifying experience being helpless and without your powers, isn't it?"

Tears filled her eyes. "Castiel… please…"

"You raped me, Anna," Castiel said, his voice taking an even deeper and more ominous tone than normal. "You corrupted me... And you used Dean… And then you manipulate him to take him away from me."

"Castiel… I can explain…" she whimpered pitifully.

"Oh, you will explain," he growled, his face darkening. All signs of compassion were gone. "You will explain, but only after I make you suffer just a small amount of what you have put us through!"

He slowly pulled out two small knives, one was a simple hunting knife, the other had inscriptions on the blade and handle. Her pitiful smile quickly disappeared at the sight of them.

"What… what are you doing...? Castiel…?"

Castiel's eyes narrowed as he pointed to her with one of the knives.

"I learned some things from Dean… you remember… that night with Alistair…"

Anna gasped in horror.

"You… you wouldn't!"

Castiel took a step towards her and sneered, speaking only one word.

"Run."

Anna cried out in terror and ran blindly away from him. The barn was large and old; rows of stalls lined the sides. She spotted a ladder that went up to the loft. Sobbing, she ran to it and began climbing. She heard Castiel's voice float up to her as she made her way up the ladder.

"I'm letting you run, but you know it's hopeless… I will find you… there is no way out of here… you will pay for what you've done…"

She reached the top of the ladder. Spinning around she spotted a large window at the other end of the barn. Anna began running towards it, not caring how high off the ground it was. It was an escape. That was all that mattered. She ran as fast as possible and was almost there…

Suddenly, Castiel appeared in front of her. Unable to stop herself in time she ran into him and he grabbed her. She screamed in horror and began flailing and kicking him in an attempt to escape. He ignored her, though, and began dragging her across the barn.

"Castiel, stop! Please don't do this! I'm sorry! I'm sorry for hurting you! I'm sorry for what happened with Dean! No! No!" Anna screamed, trying to free herself from his grasp.

He ignored her screams. He could feel the adrenaline coursing through his vessel's body. It filled him with a sense of euphoria he had never experienced before. He had felt so powerless before. So out of control. But now, as he dragged her to a nearby post and began binding her hands over her head, the control he had desperately needed was firmly in his grasp. She could no longer hurt him. She was no longer in control over him. He had the control. He had the power over her. The power was intoxicating. And he wanted more of it.

"You're insane, Castiel!" Anna screamed as she tried to kick him when he began tying her legs to the post. "Please, don't do this!"

He slowly looked up at her.

"What did you do, Anna?" Castiel said calmly, "When I begged you to stop?"

She looked at him in terror and shook her head.

"Castiel… please… I'm sorry…"

He finished tying her up and took a step back to look at her. Her pale face was streaked with tears, her eyes reddened from crying. He then pulled out the plain silver knife and held it to her throat.

"I should torture you, Anna… torture you slowly… make you suffer for days like I have suffered…"

She froze, desperately trying to strain away from the knife that he pressed against her flesh. She was now too terrified to speak. He deftly drew the blade down her throat, a thin line split her skin and blood trickled out. She let out a whimper of pain.

"But then, had you only forced me to suffer you wouldn't be here… I can carry the burden of my own sins…"

Castiel drew the blade down the other side of her neck, eliciting another trickle of blood and cry of pain.

"But you went after Dean… you used him and tortured him as well… made him suffer needlessly when he has already suffered more than any human should…"

"I'm sorry," Anna whispered in a sob.

He raised his eyes to look at her.

"Yes… you are sorry… you are sorry you are here… you are sorry about what is going to happen to you… but you are not sorry for what you have done to us… you carry no remorse."

She looked at him and desperately shook her head.

"No… I am! Please!"

Castiel dropped the knife to the floor and pulled out the second one and held it before her.

"Do you recognize this blade, Anna? You should, as you used one similar to it before… when you cut out your grace…"

A look of shock came over her face as she began to realize what was going to happen.

"You… you wouldn't…"

"Your grace is corrupt. You do not deserve it. I am taking it back to be purified and given to one who is more deserving."

She began struggling wildly against her bonds and screaming.

"No! You'll kill me! YOU'LL KILL ME!!!"

He nodded slowly and took a step back.

"Vestri venia est infectus," Castiel began to chant as he took out a small vial and set it nearby on the floor. "Vestri sins es plures. Capiam vestri venia. Incendia of salus mos defaeco sins. Quod iam vos mos intereo pro vestri sins. May Deus nostrum Abbas fuisti misericordia in vestri animus."

Anna began screaming, both in fear and rage.

"You son of a bitch! You think this will save you and your little man whore! They'll find out what you've done! They'll find out and they'll cut out your grace too! You'll fall! And then they'll take him from you! They'll use him to destroy Lucifer and then they kill him! They'll kill him for what he's done! They'll kill him! They'll never let you be together! NEVER!"

Anna's words cut through the angel. Castiel felt a flash of horror at the thought of losing Dean, but then felt pure unadulterated rage course through him. He glared furiously at Anna and with a furious yell he plunged the knife into her chest.

She let out a grunt at the knife's impact. Her eyes widened in shock and she slowly looked down at the handle sticking out. She then looked back up at Castiel. She tried to speak, but began to cough, blood began trickling out of her mouth from the force. She began to gasp for breath, creating a gurgling noise in her throat. Castiel quickly pulled the knife back out and a gush of blood shot out from the gaping wound. She struggled for air to no avail. Her gasps slowed until her body fell limp. Her eyes glazed over and stared unseeing at Castiel.

Suddenly, a blue glowing light began to flow from the wound. It trickled down to the floor and flowed into the vial Castiel had set nearby. Once it all had gone in the vial simply sealed itself shut.

The night became eerily silent. Castiel stared silently at Anna's dead body. The adrenaline that had driven him moments before had gone away. He was suddenly left with the realization of what he had done. The knife fell to the floor, dropped by his trembling hands. He suddenly felt cold and alone. Tears welled up in his eyes and he suddenly had an overwhelming desire to escape.

He grabbed the vial off the floor and tucked it in his pocket. He gave one last look at Anna before he disappeared into the night. After he was gone, her body and the two knives crumbled into piles of blackened ash. They were then scattered as a breeze blew through the empty barn.

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Rough Latin to English Translation:

Your grace is corrupt. Your sins are many more. I will take your grace. Fires of Heaven will cleanse the sins. And now you will to perish for your sins. May God our Father have mercy on your soul.

OK, for the record, writing dark Castiel is not easy, at least for me! That took me 3 days to write! I hope it turned out alright.

Also, I found on online translator to write the Latin part. If it's not 100% accurate, well, then blame the translator! : )