Benihisago

The is a giant gourd that is able to  take a person's  hostage, by saying the verbal command ". After the word soul has been drawn out by the Kōkinjō and then severed from their body by the Shichiseiken, it is absorbed into the gourd. Completing these conditions "curses" the victim; if they utter the word they have said the most during their life, they will be sucked into and trapped within the Benihisago for eternity. Saying a homophone of their most frequently spoken word, or even saying nothing at all, will also trigger the gourd's suction. If a victim starts to be sucked into Benihisago, the suction will stop if their most-used word changes.

The Benihisago is revered as one of the treasured tools of the Sage of the Six Paths. All five of the tools consume enormous amounts of chakra when used, so much so that normal humans would die after using the tools for only a short period of time. When the gourd and three other tools later came into the possession of Kumogakure, only the Gold and Silver Brothers - due to their large chakra reserves - were able to wield the treasures without fatal repercussions. When not in use, Ginkaku used the Kōkinjō to tie the gourd around his neck for easier transportation. When the rope is removed for combat, he must carry the gourd.

Trivia

 * The Benihisago is based on a tool from the Chinese classic "Journey to the West". In this story; there are two demon king brothers, known as the and the . The siblings possess five treasured tools, one of which is called the  and has the ability to suck in their opponents, melting them once they are trapped within.