Nami Nami no Mi

No this doesn't turn you into Nami or make you sexy, sorry :(

The Nami Nami no Mi is a Paramecia-class Devil Fruit that enables the user to tear through anything just by running a body part along that object. "Nami" comes from "Namida," meaning Tear in Japanese. In the Viz translations and FUNimation dubs it is called the Rip-Rip Fruit.

Strengths and Weaknesses
By simply running a body part down a surface, such as a finger, the user can create a tear in that object. This can easily be used to get through walls, by simply creating a tear in the wall and going through the tear.

The fruit also has good offensive capabilities due to the ability to rip through people, easily injuring them even if the user is not strong and the victim is.

However, the user must be in contact with something to tear it. Also, the tears made on people are only slight flesh wounds which would not normally incapacitate them, though it may give them a lot of pain and can open them up to greater attacks.