The W
You feel your senses pop as the collar deactivates. Perhaps turning this man's saliva to ice might just keep him from spitting at people in future. With a gesture of your hand you fill his mouth with frozen saliva. You hear what you hope is at least one tooth exploding and he reels clutching his jaw. Terror spreads across his face. He thought he had been safe with the warden near. With muffled cries of pain, he runs. The other guards turn to stones of terror. You feel the collar consume you again.