Hiden: Stardust Technique

The user exhales a median amount of a special bright dust seen exclusively in users of the Seiun clan, which is dispersed in the air. Thus, the user will have control over this dust as part of its chakra is contained in its molecular structure (which probably creates the glow), being able to follow its movement through the air without losing it. If someone inhales the dust, the user will be able to feel its presence through the constant flow of chakra, even if that person has suppressed its chakra, making it almost impossible to trace.