Conviction (джен)

I anon posted this back in May, but it had a lot of errors, so I have cleaned it up considerably from it's original form and posted it here.
Despite outward appearances this is not a Woobie Loki fic. Please note that this is quite dark, with character death, injury, self harm, suicidal thoughts, blood, violence and gore (although most of that happens 'off camera' as they say) so if that will upset you please don't read :-)
It was written for this prompt on Norsekink: "After Loki falls from the Bifrost Odin finds him and brings him home. Stripped of his powers and imprisoned in the dungeon, Loki protests in the only way he can – by self harming and refusing food in an attempt to starve himself to death."