"Penric. Currently professor and sorcerer. And Des doesn't have the power to destroy the world, even if she wanted to, which she doesn't. The world has too many things we both like."

That and divine oversight meant they couldn't actually kill people. Well, more properly Des or Pen could kill exactly one person with sorcery.

Pen wanted to write down the word 'entropy' and read up on it. Because it did sound like what he was describing, and Pen was familiar with the idea of sorcerers picking up something and trying to describe it to mundane scholars. Interesting to go the other way.