The user casts an illusion of darkness upon an opponent to take away their sight. As such, this allows the user to attack an opponent unseen. Although it negates sight, it does not stop the other senses.
- In the anime, Tobirama Senju was the one to use this technique. However, in the manga, the technique was cast by Hashirama Senju. In the video game Naruto: Ultimate Ninja 3, both are capable of performing the technique.
- In the manga and anime, this technique is called by its full name, Genjutsu: Bringer-of-Darkness Technique (幻術・黒暗行の術, Genjutsu: Kokuangyo no Jutsu, Literally meaning: Illusion Technique: Bringer-of-Darkness Technique). The databook entry for this technique drops the "Genjutsu" part.
- ↑ Second Databook, page 220
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