The Oni Oni no Mi, Moderu: Furari-bi (Demon Demon Fruit, Model: Furari-bi) is a Mythical Zoan-type Devil Fruit which bestows upon its consumer the ability to shift between three forms. The first form is the consumer's original form. The second form is a hybrid between the consumer's original form and a Furari-bi. The third form is a Furari-bi version of the consumer. Thus turning the consumer into a Furari-bi Ningen (Furari-bi Human). It was eaten by Diamonde .
Advantages[]
Second Form[]
Shifting into the second form, or in other words the hybrid form, bestows upon the consumer the ability to spontaneously ignite his- or herself without repercussions. Contrary to popular belief, it doesn't allow the consumer to be externally ignited without repercussions. Thus the consumer is still as vulnerable to combustion as he or she was beforehand. The consumer is also capable of flight in this form; however, flying in this form is thrice as fatiguing to the consumer as sprinting would be in the consumer's original form. Thus flying in the second form would surely be an exhausting experience for the consumer.
Third Form[]
Shifting into the third form, or in other words the full form, will cause the entirety of the consumer's body to spontaneously ignite regardless of whether or not he or she desires to do so. The consumer will be capable of expanding and contracting the fire born from his or her ignition; however, he or she will NOT be capable of expanding and contracting any other fire. Shifting into the third form will also allow the consumer to fly with as much ease as he or she walks in his or her original form.
Disadvantages[]
The consumer suffers from the standard Devil Fruit weaknesses.
Sources[]
http://matthewmeyer.net/blog/2013/10/13/a-yokai-a-day-furaribi/