Sam realized that something was very wrong. Lilith was insisting Sam to kill her because even after the power of Sam, she was the first demon and then he realized that she would be very loyal to Lucifer. She wanted this to happen. So he stopped his attack in midway. "Sam what're you doing? Kill her" ruby said and suddenly Sam made up his mind to kill her once and for all but this time he used his powers on ruby instead. She gasped and died Infront of her. "Oh Sammy. Why would you do that? Now you can't kill me" Lilith teased and sent Sam flying to the wall of the convent.
Sam landed on the floor with a grunt. He was about to get up when Lilith came right Infront of him and started using her powers on Sam. Sam gasped under the psychic waves of powers but he couldn't do anything. "Turns out you had brains afterall, eh? You figured it out" Lilith said. "Killing me releases Lucifer, but since you didn't do it, well I guess it's gonna be me who raises my father" she said and finally losed her powers on Sam and Sam slumped unconscious. She was about to kill herself when the door of the convent opened and there stood Castiel. "You Angel" Lilith was about to kill herself when Cas stopped her and sent her to hell.
Dean came into the church and saw what had happened. Lucifer hadn't rised and his brother was slumped unconscious on the side of a wall. He immediately checked Sam and started to rise him "Hey, Sam, wake up man, c'mon little brother" he said but Sam didn't even twitched. Tears started to come out of Dean's eyes as he felt for a pulse. "He is alive, Dean, but barely. I will take you to Bobby's house and heal him there" Cas said and Dean nodded and within the blink of an eye they were at Bobby's house.
Castiel had healed Sam after Lilith's attack and said the demon blood was also put of his system now. Sam still laid unconscious on Bobby's couch and Dean came and sat beside his brother on the floor and took his hand "Sammy, please, come back to me, man. I can't so this without you" yes you can "Yeah, well I don't want to" that was almost 5 years ago when Dean came to collect Sam at Palo Alto. Remembering the conversation he smiled. Dean was about to go when a moan from the couch caught his attention and he turned around to see Sam waking up.
Sam awoke with a killer headache and his vision was a little blurry. He adjusted his eyes to see his brother and Bobby and that he was at Bobby's house. "About time you woke up, boy" Bobby said. "Hey" Sam rasped and started coughing when Dean gave him a glass of water and Sam gladly took it. "Thanks" he said with a smile. "So no Armageddon?" he asked. "Nah, Cas figured out that Lilith was the final seal and that killing her would raise Lucifer and so he sent her to hell" Dean said. "Yeah, I know" Sam said. "Wait, how did you know?" Dean asked. "I was the one who stopped the attack on Lilith, Dean because I realised that something was very wrong so I stopped and killed ruby instead and then she attacked me" Sam said and Dean was shocked to hear that. "I couldn't... do it... De'n... even after... what she... did to you... I couldn't have... start the apocalypse... because of... my stupid... revenge fantasy" Sam said between sobs. "Hey, Sammy, come here" Dean said and hugged his brother. "We're okay, Sam" he said and Sam smiled.