There's been little place for some good old-fashioned knives amidst all these flying spells, but Teren is still here. She has a way of making herself invisible without the use of magic, and throughout the interrogation she is just off to the side, a blade glinting in just the right angle of the tiniest amount of light, prepared to strike and vanquish at the first indication from one of the others.
Teren has few defenses against magic, but everyone dies when their throat is cut. She watches silent and ready, known only to those asking the questions.