Hmmm. Not knowing the prompt I don't know what to say. You can't work something novel into it, like Ron-performs-sexual-services-to-pay-a-life-debt-to-the-Malfoys-and-frustrates-Lucius's-evil-plans-by-polyjuicing-into-Kreacher-every-night?

No sorry, I have no useful suggestions. Good luck though!