Newton's Fourth Law explains that in a given magical system, the energy applied in its effect will be equal to or less than the energy supplied to the system. There is complicated math to describe the loss of energy through inefficiencies in the spellcasting. 

But we're getting a little off the rails here. 

I'm calling the school Sanctuary Hill University, and it's situated in the Blue Ridge Mountains in western Virginia.

Tell me things that y'all want to see in this town, so I can include them as I work on writing it up.