Greetings to the College of Magic,
This is Godmother Lily,
In response to your request for ideas for your students,
I recently remembered a question I had that I could use your help to answer:
What happens if a transportation mirror is transported via another transportation mirror?
Happy Experimenting!
Godmother Lily
Author's Question: When did you first start reading 500 Kingdoms? I was, around... 18?