Void

is a Dōjutsu technique accessible through the left eye ofRaiku Uchiha's Mangekyō Sharingan and is noted by Kai and Toramaru Uzumaki to be one of the most powerful Barrier Ninjutsu in existence.

Usage
The user, in just a single glance, erects an invisible barrier in an instant, covering a range of 1km radius around them. This barrier instantly disables all dōjutsu techniques, along with other Kekkei Genkai, Kekkei Tōta, Kekkei Mōra, Medical Ninjutsu, Senjutsu, Space time Ninjutsu, Chakra Absorbtion Techniques or tools, Regenerative powers, powers of the Sage of Six Paths and Jinchuriki powers, leaving opponent(s) and Raiku to rely on natural skill and trained techniques like regular Ninjutsu, Taijutsu, Genjutsu and Kenjutsu, which Raiku is immensely skilled at. Raiku's skill with the technique is so great that he can perform it without a moment's notice nor any dōjutsu active. The technique, due to it being a mere chakra less, self-sustained barrier, is unable to be absorbed. Depending on Raiku, the technique can last from a few seconds to hours until the user and opponent(s) disabled techniques are rendered usable.

Drawbacks
The technique puts a massive strain on the eyes and causes intense pain and irritation. This technique also disables Raiku's own eyes for that period of time, but he does not consider it a drawback due to his natural skills without the eyes.