Dark Release: Magician's Black

Using Dark Release chakra, the user transforms themselves into a formless shadow. The user can then inconspicuously travel across any kind of terrain in their shadow form. The speed at which they can travel is dependent on the strength of their chakra (Ninjutsu). In this form however, the user is extremely vulnerable. As they are still tangible, they could be easily pinned down or sealed into place. Doing so leaves the user no choice but to dispel the technique, leaving them defenseless to any incoming attack during the transformation.