Answer
Ulysses Klaue, played by Andy Serkis in Avengers: Age of Ultron, is a South African arms dealer and physicist who possesses a vibranium prosthetic arm. He is a skilled combatant and strategist, and his knowledge of vibranium makes him a valuable asset to Ultron. After betraying Ultron, Klaue escapes with the vibranium, setting the stage for his future appearances in the Marvel Cinematic Universe.