
I think this story has one of the best portrayals of a protagonist's decay because, at least in my case, Phos's descent into madness didn't feel sudden. On the contrary, it felt natural. I didn't even notice when he started becoming 'crazy' because, in his position, everything he did seemed like common sense.
While reading, every action Phos took made sense to me, just as it did to him. His actions were drastic, but so were his circumstances. He was desperate.