Draughts

Draughts are parasitic spirits and are a leading cause of cases of Accedia. Able to enter people experiencing boredom or ennui, they create a psychological cycle of highs and lows, excitement about life followed by pits of depression and feelings of disconnect and lost. 
Adepts affected by these creatures often go through long hauls of spiritual nothingness, leaving them susceptible to Accedia. Draughts affecting non-Adept human beings usually result in cases of bi-polarism and similar disorders. 
Draughts only have power so long as their 'host' remains ignorant of their presence within his system. People who have successfully freed themselves from a Draught say the trick is learning to hold unto something which gives you meaning in life through the "lows" of the Draught's attachment to you.