Two lines I thought would have worked well with Harry's conversation with Tubany:
"I'll hurt you, yes. I'll hurt you so much you will beg me to kill you. But, I am not a heartless man, so I will oblige."
And:
“You wouldn’t. You’re a light wizard!”
"Light? There is no light or dark, there is only power!"
Lucile Malfoy hears that, she probably heard it from Lady Voldamorta, she'll piss her... petticoats?
-mo