The Jade Pipe is an item needed to progress forwards on the 5th Floor.

You obtain the Jade Pipe by first constructing the Glowing Bottle. After that, you must find this pipe inside of one of the dressers adorning the halls of the Dark Maze.

After obtaining the pipe, you must give it to the prisoner inside of the right cell, and someone will leave the left cell, thus opening the door and allowing the player to obtain the Glass Shoes, and subsequently pass safely through the Poison Hall.

The Pipe is supposedly used by the prisoner you give it to to smoke the Medicinal Pollen given to you (and then the prisoner). It is unknown whether this improved or worsened the prisoner's condition.

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