Celenia D10 System CD10: Traits and Skills: Ultrasonic

Your ears and vocal cords have evolved and you can perceive and transmit sound at ultrasound wavelengths. In addition, you can interpret ultrasound echoes at high precision. This allows you to "see" in the dark by emitting short pulses of ultrasound and listening for the echo.

You can also use this as a weapon. By focusing the sound waves at a single, organic target, you can cause them to become paralyzed. The sound waves have a Lethality value equal to the value of this trait. If the target fails their save, they become paralyzed for as long as you are within 10 meters of them and continue your attack.

You can maintain the attack for one round for each point of the trait, after which you must rest your voice for at least an hour.