A Werewolf?

The cauldron had a blue liquid that smelled just like the sea. It was beautiful, and when Matilda looked at it, she was delighted.

"Truth be told. The reason for this test was to show all of you how hard alchemy is, and that is okay to fail, especially without prior experience. But this? Drakian crafted a difficult potion on his first try. Without a doubt, impressive." Matilda said, looking at all the students.

Arthur was happy to succeed, but all that attention aimed at him wasn't something he wished. He was disguised, so there was no point in becoming famous.

"Well, it just happens, right? I'm too awesome." Arthur thought, proudly smiling after hearing Matilda's words.

Matilda grabbed a few empty flasks from her purse and filled all of them with the potion. That full cauldron netted about 11 flasks, and 7 of them went to Matilda.

"I got more because as I was the one giving you the ingredients." Matilda said.