Wrench Blackboot is a great dwarven tinker. Before he went deaf, he was hailed for his study of sound and creation of devices to capture and imitate sounds. In his studies, he learned of how sound moves in waves. He was fascinated to learn that a sound could be cancelled by a wave form directly its opposite. Having no love for the arcane arts, he made a waveform canceller specifically to aim at spellcasters, the Wizard Silencer.