It was good to know there was some limit to conjuring -- a good imagination wasn't enough to get accurate results for some things. In order to replicate, there had to be a clear image and understanding of the thing that was being brought to existence. Levi filed that information away for later.
"I'm glad too," he decided on after a beat. "It wasn't something you or Sabrina had to do. Altruism on that level was rare, and Levi wasn't without some confusion over it.