Caleum looked towards the student and smiled. "Wand moment is a must at this point. As you go on through your years you will learn to cast silent spells but that is another class period." Caleum chuckled then heard her speak that she had never tried dueling. "You know, this will give you good training. It is always good to learn such things as you never know when you will need them."

But as he heard the Ravenclaw Prefect speak he nodded his head as he was still slightly nervous at the moment. "You know, you are correct in what you say as Protego would counteract with Expelliarmus, but Incarcerous would be perfect." He was more afraid of someone starting a fire with the other spell if it were cast, not that he wouldn't be about to handle that spell but just at the moment, sending ropes flying would be better to him.