Black Death

Introduction
Black Death (Real Name: Justin Yersin) is a pirate who believes that the world is filled people who have tainted and should have died from their immortal actions. So he would kill them by infecting them with notorious diseases and believed that he is Death since he has the power to choose who lives and dies.

Weapons
Injection Needles

Saw

Scapel

Staples

Devil Fruits
For further information: Yamai Yamai no Mi