fic to write: if you've seen that post that explains an AU where when people go through puberty they begin to turn into monsters and I think it would be AWESOME to see your take on it. Other ideas: magical realism, more dragons, and reaper!Dean.
Castiel wakes up one morning and everything is different.
His head aches, not the heavy, thudding feeling of his migraines- instead, it is a splitting, driving pressure right against his forehead. It won't stop, either, it just splits and aches and pushes against him, something hard and heavy and uncomfortable. His fingertips ache, sore. And his eyes- he feels like he swam last night and didn't take his contacts out. Painful.
He screams when he gets to the bathroom .
His fingernails have grown- turned dark and are slightly longer. His head ache is two small, dark horns, gently pointed at the top of his head. And his eyes have changed. They don't have pupils or white they're just- they're just black. Black all the way around.
Castiel screams and screams and screams until his brother comes up and opens the door and finds him there, screaming.
"Oh," he says, his voice soft. "Oh, oh honey." Gabriel's tone is gentler than usual. "You're a man now."
Castiel screams so long, his voice gives out.