The YA Fantasy Showdown is underway, and my very own battle (Hermione vs Chrestomanci) is up! It is both tender and witty (or something).
I tickled myself very much by making up a new spell (the second one), just so that Hermione can hit Chrestomanci where it hurts:
"Teeth set, she set her mind to the spells that she knew would hurt him more than any others--”Diffindo!” she cried with every fiber of her being. Her wand shot out a shower of sharp sparks, and the seams of his jacket split. “Lutulentum Vestimentum!” and specks of mud appeared on his snow-white shirt. At least his clothing was vulnerable, even if her spells weren’t reaching the man himself."
The Latin translates (I hope--it's been years since I studied Latin) as "sullied clothing."