Hey! This is actually a story my friend wrote. But since she was too scared, I decided to upload it for her. I hope you enjoy, and please don't read it if you don't like it.
An angel's love
Dean's POV
I am running. And running away from whom? My little brother. Sammy said "yes" to Lucifer and he's not my little brother anymore. Suddenly, I feel a sharp pain in my left shoulder. Sam has caught up with me and I see his fists coming for my face. There's no escaping now but I cannot stop trying. I raise my right hand up to block an incoming punch. Phew! I blocked that. And another punch heads towards my stomach. Damn! I was unable to block it and the force of the punch made me skid back nearly a mile. I see Sam coming towards me and suddenly feel a sharp pain in my side. I realize that I have blood coming out of my forehead, a swollen eye and a busted lip. I can taste blood. I want to defend myself but my muscles disobey my orders. I cannot hit Sammy. Even though he's not Sam anymore, he's still my little brother. I'd rather die than hurt Sammy, because that's what I'm supposed to do – protect Sam. My vision is blurry, and tears are beginning to dropping to the ground, mixed with blood. I see Sam pick up Cas's knife which Cas had given me to defend myself.
It's useless trying to defend myself against a knife. So I close my eyes and wait for the knife to hit. But I can't feel the pain. So, I open my eyes and the sight in front of me freezes me. Castiel is standing in front of me the knife through where his heart should be, blood dripping down. There is a smile on his face. He raises his hand towards my cheek, caressing it, and says "See you later on the other side, assbutt."
And then he dropped dead.