Writing a story: what comes next?

Hey! Some of u might remember my "evil theater evil town" story i brought up earlier. Well i thank all of you for your help but i need help....AGAIN! Okay. Well, im on the prologue, and its in the theatre in 1921 (whic adds up to 13..hehe, clever huh?) but anyway. The evil magician is enticing his first victim. So what should the "grand" magic trick be? It needs to be long, great, grand, etc. magic trick, that has the girl dissapear. Not reappear, because thats how he gets her to join the magic trick forever. But it needs to be so great that the audience doesnt care what happene to her. any help? please.