Kotsuzui Kotsuzui no Mi

The Kotsuzui Kotsuzui no Mi is a paramecia class Devil Fruit which is considered a powerfull fruit to be used for torturing, It was eaten by Kaoichi Izama

Strengths And Weaknesses
The main strength of this fruit is to allow the user to absord the marrow from the bones of a person causing them both great pain and suffering and to some level even death.

This fruit suffers from the standard Devil Fruit weakness, And also it apears the user needs to be in close contact with a bone to absord its marrow so he will have to be either touching it literaly or being close enough to absorb small amounts of it.