Vanishing Strike is a technique used by most practitioners of the Active Yin Style. It allows them to shift their attention and weight to any limb in order to strike at incredible speeds. With this technique they are able to create afterimages with their strike or cause their limbs to vanish all together. If used properly, even some forms of dojutsu will have a hard time keeping up with its speed. With this technique, a shinobi is able to strike at high speeds not just once, but multiple times in a row. This makes it very easy to overwhelm their opponents without having to rely on strength.
An alternative way of using the technique is to coat one's limb in yin energy. It may use chakra, but it is a lot more reliable. This is because the yin energy will prevent the opponent from not just seeing the attack, but from hearing, feeling, sensing, and smelling it as well.