Genjutsu Ball Trap

A series of traps that placed in bridge dimension that bridged the Moon and Earth. It was created from a dangerous bubble-like substance that traps victims in a genjutsu dream, where they live out their memories.

It also has two known forms. Its immature form is simply enormous bubble-like substance, and its mature form appears like a ball made from a quartz-like substance from outside, however if anyone plunged into the ball, they will be trapped into a space that reflects and their memories for a near indefinite time, shutting them away in their own memories.

Trivia

 * In the novelisation, Shikamaru decides to call this technique.