Susan has her new insights into Gray College's courses:
Fire magic is used to light stove fires; water magic is used to wash pots; lightning magic is used to kill chickens and fish;
The skeletons summoned by the necromancer are used for housework; the toxins prepared by the necromancer are used for seasoning.
As for knights, they are used for hunting.
So far, the tutors at Gray College have not figured out whether it was Gray College that created Susan, or whether Susan influenced the entire Gray College.