Tyrannical Thaumaturge Mouse

This terrifyingly powerful student is an apprentice in name only as she has proven to rise above the rest of her classmates... literally. She uses a mysterious, mystical orb as an arcane focus to elevate her powers to an unsettling level. No one knows where she got the orb and although such things are technically not allowed during exams, the proctors are too afraid to attempt to confiscate it.