Were they going to be testing the potion they were making? It was illegal, after all. Hayden really had no idea what to expect but honestly she wouldn't be all that surprised if they were going to be tasting the potion. She'd learned to expect the unexpected at Hogwarts.

Hayden took out all the ingredients she needed. Then she inspected her cauldron very carefully to make sure it was clean, even though she had no idea how it would have gotten dirty. Luckily it hadn't so she was able to get right to work without cleaning it first like several people were. (Speaking of which, Hayden took a mental note of the spell they were using.) Next she took out all the equipment she needed and made sure that was all clean before grating half a unicorn horn.