Cloud-Cloud Fruit

The Cloud-Cloud Fruit is a Logia fruit that allows the user to create, manipulate, and change into any type of cloud. It was eaten by Hummel.

Abilities
As a Logia fruit, the user is incredibly difficult to fight without the use of Haki. Hummel posses the ability to transform into any cloud, including those found on sky island. He also has limited control over certain weather elements that have to do with clouds (IE Thunder, Rain, etc)

Hummel is also granted the ability of flight due to the fact he can turn into a cloud. Hummel also has shown that he can suffocate others by trapping them in clouds filled with moisture, essentially drowning them.

One of the main drawbacks to Hummel's ability, however, is that he requires moisture in the air in order to perform any of these abilities. If the area he is in is dry and lacks moisture, he will not be able to use his Devil Fruit abilities.

Rating
Scholasticus classifies this devil fruit in the "B" class:

"While arguably one of the weaker Logia fruits, this fruit still has a lot of potential and can be absolutely deadly in the right hands. However, unlike most Logia's is has a massive weakness with only being able to function with moisture."