Reikai Reikai no Mi

The Reikai Reikai no Mi (Spirit World Spirit World Fruit) is a Paramecia-type Devil Fruit which bestows upon the consumer the ability to charge up and then discharge a spiritual shockwave which will transfer the consciousness of those whom are physically contacted by it to an alternative reality where they'll be forced to defeat the consciousness of the consumer in order to return to the principal reality with their consciousnesses intact. Thus making the consumer a Reikai Ningen (Spirit World Human). It was eaten by BLANK.

Advantages
The Reikai Reikai no Mi allows its consumer to confront his or her opponent(s) in a battle of imagination and willpower, effectively rendering any physical superiority that his or her opponent(s) may have had over him or her a moot point. It also gives the consumer a type of home-field advantage, since the consumer will be accustomed to combat in the alternate reality whilst the consumer's opponent(s) will be completely new to it.

Disadvantages
Utilization of the Reikai Reikai no Mi is somewhat of a gamble, for it's perfectly possible for the consumer to unintentionally confront an individual with a greater amount of willpower and or imagination than him or her.