You study at the Slytherin faculty together with Draco Malfoy. When the teachers decided to arrange a duel at your faculty, they decided to choose you and Draco Malfoy for this. You were surrounded by students and teachers who looked to make sure it didn't go too far. You took out your wand and looked at Draco, and he stood and smiled

"Get ready to beg for mercy, mudblood)" Draco grinned and pointed his wand at you