Subsonic Movement Image
Prerequisite: Must be a demon hybrid and level 10 or higher
 

Allows you to move and fight at Subsonic speeds. 
if you and your enemy both fight at subsonic speed no normal person or being can see it. To them its just flashes and blurs.

Your moving faster than the speed of sound, 50 000 Meters per second (speed of sound is 343 meters per second, speed of light is 299 792 458 meters per second) 

Subsonic Movement Image