Kame Kame no Mi, Model: Black Tortoise

The Kame Kame no Mi, Model: Black Tortoise is a Mythical Zoan type Devil Fruit that allows the user to transform partially or fully into a Black Tortoise (Genbu), one of the four symbols of the Chinese Constellations.

It was eaten by Sorah.

Strengths
This fruit allows the user to turn partially or fully into a Black Tortoise, or Genbu, one of the four symbols of the Chinese Constellations. The user strength, endurance and size are increased, the user also has a snake on the shell, which obeys all the user's commands.

Weaknesses
The user suffers from standard Devil Fruit weaknesses. Also, the user becames very slower when transformated.