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 which capable caught its victims into a very powerful genjutsu produced by the Gatekeeper, a giant crab resided and guarded the Moon entrance.

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