<Li> Chadwick Boseman as T'Challa / Black Panther: The king of the African nation of Wakanda, who gained his enhanced strength by ingesting the Heart - Shaped Herb . </Li> <Li> Paul Bettany as Vision: An android and Avenger created using the artificial intelligence J.A.R.V.I.S., Ultron, and the Mind Stone . Anthony Russo called Vision "a living MacGuffin . Obviously, that raises the stakes because Vision's life is in danger, and his life is in conflict with Thanos' goals, so something's got to give ." </Li> <Li> Elizabeth Olsen as Wanda Maximoff / Scarlet Witch: A member of Rogers' faction of Avengers, who can harness magic and engage in hypnosis and telekinesis . </Li> <Li> Anthony Mackie as Sam Wilson / Falcon: A member of Rogers' faction of Avengers and former pararescueman trained by the military in aerial combat, using a specially designed wing pack . Mackie noted that Wilson has a grudge with other heroes like Iron Man and Black Panther after the events of Civil War . </Li>

What is the main story of avengers infinity war