#absolute randomness

William was really excited about this event as he was one of the people in charge of it, just like the year prior (as much as Cassandra claims it to be her idea). Potions allowing the user to change into some spooky creatures in spirit of the Halloween were a success back then, especially for those who didn't have a costume. Everyone from sandy mummies to cats with pretty bows roamed the ballroom (and some — wreaked havoc).

Changing into their classmates was not the aspect they'd considered until this year, and the permission to do it officially took Will a lot of time and effort. The prefects had to make sure that no transformed student left the designated area, that only the 7th-years took the polyjuice vials, and that the potions themselves were acquired from a reputable source.

William expected some cheating to occur, but not that it would affect him personally. And yet.

He took the vial he was given with excitement. Who would he become! Who else is participating! What is the pool of students he's picking from! William spent a few days looking through his archives, trying to recall his friends' mannerisms and speech patterns, obvious ticks and smaller details, typical topics of conversations, and so on. He was so prepared to play his role that—

— that when he watched in horror as teal fur started growing all over his face, as he felt the same hairy needles spread over the rest of his body, as sharp claws replaced his carefully manicured fingers (at least it didn't spread to his feet?), and as his lips— Merlin, he no longer had the lips, he had a beak! When all of that looked back at him in the mirror, all hope for a fun evening was lost.