Infinite Tsukuyomi

This technique is the key to Madara's Eye of the Moon Plan. It creates an empty dimension under the user's control, which can be then filled with contents of his desire, using the power of the Shinju to do so. To trap every human being in this genjutsu, it has to be cast onto the moon's surface using the eye of the Shinju. In order to do that, one needs to become its jinchūriki.

Limited Tsukuyomi
In Naruto 6: Road to Ninja, Obito casts a trial version of the Infinite Tsukuyomi, the, on Naruto and Sakura, which provides the alternate reality setting of the movie.

Trivia

 * In Naruto: Road to Ninja when Obito uses the Limited Tsukiyomi and the reflected eye of the Ten-Tails appears, it has seven tomoe, representing the number of tailed beasts Akatsuki had captured at that time.