There is an entity who exists purely to torment and taunt you, prodding you when you least expect it and keeping you always alert due to its near-constant harassment. Despite attempts to convince others, nobody believes this entity exists. In reality, you are being tormented by a ghost-like creature known as a Boghan - a creature who links itself with your soul in order to hide from magically prying eyes, and torments you subtly as they feed off of your paranoia. Mages rarely are able to deduce the existence of Boghans, and thus prefer not to, due to their tricky natures and the expensive reagents needed to rid one from another's body.
Choose either Hallucinations or Schizophrenia. You receive this mental illness.
If hallucinations are chosen, you choose a single Sense skill. This skill does not receive a penalty from the hallucinations mental illness but instead the penalty becomes a bonus, with hallucinations granting you a +10 bonus on the chosen sense skill.
If schizophrenia is chosen, you do not fly into a rage at the maximum of the Schizophrenia Counter - instead you fall prone for 1d10 rounds minus your Common Sense (minimum of 1).