Though originally designed to destroy the Avengers, the Vision would invariably become one of the team’s strongest members. Created by Ultron, Vision was unleashed on the Avengers in order to lure them into a trap.
Seriously wounded after a gangland shooting, attorney Jennifer Walters received an emergency blood transfusion from her cousin, Bruce Banner, aka The Incredible Hulk! Transformed by the blood transfusion, Walters received a milder version of her cousin’s powers. She was large, green, and impossibly strong, but she still retained her intellect and personality.
While serving prison time for a crime he didn't commit, former gang member Carl Lucas volunteered for an experiment that gave him enhanced strength and unbreakable skin. He promptly used his new abilities to escape prison, returning to his boyhood streets of Harlem.
Rather than returning to crime, he took the name Luke Cage and became a mercenary "hero for hire," using his powers to help anyone who could afford his asking price.