Literature
Leviathan.Cas
Castiel was staring at Dean with his trademark sparkling blue eyes and an almost ninety degree head tilt, but he was sporting a grotesque smile and after a few seconds of mind-imploding silence, he let out a deep huff of air that gradually became a drawn-out laugh so incredibly evil that it sent a violent shiver straight down Dean's spine and made his heart stop. He broke the tension with a quivering whisper, "Cas?"
This strange Cas let out a laugh, more or less of a laugh anyway because it was so demented, "Ha,Dean Winchester, even alllll the death you witnessed and felt and caused among your friends and family, you'd think that you'd have