"You'll serve my will because you know your place," Rodolphus said through clenched teeth, his fingers itching at his side to reach for his wand.
He was reminded, as he often was when he met someone he immediately wanted to kill, of Frank Longbottom. He wondered if Munch would scream - he liked them far better when they screamed and not when they gave off that air that even while you were taking them apart that they thought they were somehow on equal ground with you.
Instead of hexing, he leaned across the desk, closer into Munch's sphere. "Or perhaps you're mentally challenged in some way, Munch. Don't you know who you work for, now?"