Because that's how sympathetic magic 'works'. I have to tell you I'm putting the Evil Eye on you in order for your imagination do do the job for me. Conversely with prayers. That it's all bollocks is incidental, it seems.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'
