Demonstrate?  Teri saw that Sarah was frozen in place.  "Please don't hurt her," Teri said.  "She's...she's really nice and my mentor.  A more powerful ward, you said?"  Teri breathed a little easier.  Her too-small robe had started to come open in the front, and she pulled it together, tightening the belt that held it.  "I'd like to see.  I'm trying to learn everything I can so I can be a powerful wizard someday.  You can set me down...I won't try and run away, I promise."  She looked at him meekly as her blonde hair spilled over a couple of his massive, reddish fingers.