A phase-switcher is a rare psi genetics class. It is characterized by an ability to change the frequency of psi, both in and outside the range that normal psis can sense. This makes them well suited for both combat and stealth. for example, phase-switchers can match frequency with another person, and actually reprogram their shields and constructs. Conversely, if under attack, a phase-switcher can phase out of the range of normal psis, making them undetectable.