Kyōki Kyōki no Mi

Introduction
The Kyōki Kyōki no Mi is a Paramecia type Devil Fruit that allows the user to make someone sane or insane. it currently has no user.

Appearance
It looks like a purple tangerine.

Usage
The user can give a target any degree of insanity so they are unable to fight.

Weaknesses
Besides suffering from standard Devil Fruit weaknesses, when this fruit is eaten, the user gains an incurable insanity. it is also basically useless against insane opponents as curing them is just helping them.