Summary
Malfoy has been tasked to kill Dumbledore. Harry wants to stop him. He polyjuices into Malfoy and polyjuices Malfoy into him just before boarding the Hogwarts express. Things don't go as planned when he is taken in front of Voldemort to get the mark. They spin out of control when he realizes that it's him who was marked not Draco Malfoy. POVHP POVDM