Nature (слэш)

Written for this prompt on Norsekink.
"Loki is captured by The Avengers and placed in a hospital where all the worst, criminally insane villains are sent. He is given medication which prevents his magic working, but that doesn't rob him of his ability to lie, manipulate the other patients and basically cause hell for everyone just for fun."
The original prompt was vaguely inspired by One Flew Over The Cuckoos Nest, but don't worry, it ends up being quite different (I've never managed to stick to a prompt yet...)