Follow him and assassinate him

From Create Your Own Story

You swing open the door and walk down the hall. To your right are windows looking over the back yard. You slowly and quietly open the door that the magician walked through. He is standing on the back porch smoking a cigarette. You pull out your strangulation wire and attack him. He struggles a bit, grasping at his neck, but then finally collapses on the ground.

Steal his clothing and pose at the party as Vladimir
Return to the ballroom