Hogwarts School of Witchcraft and Wizardry
England
Draco Malfoy tiptoed to the unused girls bathroom, where he suspected Harry and his cronies did their dirty work. Sticking his gelled head in and looking back and forth, he smiled grimly. Ah look, the invisibility potion he happened to overhear the three whispering oh-so-discreetly about last week over dinner (lamb pie and tarantula legs, his favorite). He sauntered over to the cauldron and saw that there were still a few drops at the bottom, a subtle green color. Grabbing one of the leftover dixie cups, he poured the remains of the potion into it and gulped it down.