Diamondback (Marvel)

Diamondback is a Marvel Comics supervillain from the world of Earth-616.
He is primarily an enemy of Luke Cage and is notable for being the first major supervillain that he faced.
Willis Stryker, one of Luke's childhood friends, first appeared in Luke Cage: Hero for Hire #1. He is known as Diamondback for his mastery of knives, including specially-gimmicked knives that explode, release toxic gases or create sonic waves.
See Rachel Leighton for the other version of Diamondback.