Prologue
Sam looked at his reflection in the mirror and wondered who he was. Was he still Sam Winchester, the human? Or was he Sam Winchester, the demon? He didn't think he'd ever really know. But the yellow eyes that stared back at him told him that he was evil, he had to unleash his evil. It was time to make Lilith pay for what she'd done. But how could Sam go back from this; he'd gone 'dark side' he'd never be the same again. There would be other hunters thirsting for his blood when word got out. Dean would never see him the same way again. Was it really worth it? Unleashing his inner demon just so he could kill Lilith? Sam didn't know.
"Sam, are you ready?" Ruby called from the doorway. Ruby had persuaded him to give in; she said he'd never be able to kill her unless he stopped fighting against what he was meant to be…who he was meant to be. She had hassled and hassled him until he'd started to believe that maybe she was right. He had to stop Lilith, stop her from hurting innocent people…punish her for killing Dean and making him endure all those months in hell. He had no choice; he just had to be the one to end her. Was he ready? He didn't know. A part of him was still unsure about this; what if he couldn't control himself anymore…what if he hurt Dean. Dean…Dean didn't even know what was going on. Sam had faked a huge argument with him and taken off with Ruby so that they could plan this. He hadn't liked the idea at first but later on as he tried to reason with himself he realised that he wasn't doing this to hurt Dean, he was doing it for Dean. He turned to face Ruby with an indifferent look on his face.
"I'm ready" he said as he walked towards her. But as he watched her smile, something snapped inside him and he felt hot, white pain running through his head. This was followed by a surge of anger. He needed to let it out somehow; he needed to kill someone, anything, and Ruby was there. Her eyes widened as she realised what was happening,
"N-No…Sam you can't send me back down there….it's Lilith you want to kill not me! You can fight it Sam…I know you can" she said in pleading tone. But her cries fell on deaf ears. Sam raised his hand and proceeded to pull Ruby out. She gasped as the first cloud of black smoke erupted from her mouth. Sam to his credit was trying hard to stop himself but he couldn't…he needed to do this. As the last of the black smoke disappeared back into Ruby as she fell to he ground he decided that he wasn't going to let her go that easily. He was going to make it hurt; make her wish that she'd never had anything to do with Sam, ever. Sam stood there as there was an eerie silence in the room. He felt very calm, a complete contrast as to how he'd felt before and slowly he realised that he'd gone 'dark side' and it felt good. Really good.