These Arrowverse villains definitely earned their bad reputations. We're looking at the most cunning, entertaining, and/or vile antagonists that have appeared in Supergirl, The Flash, Arrow, and Legends of Tomorrow. Since some of their backstories and evil deeds are tied to major plot points, beware of huge spoilers ahead. MsMojo ranks the best Arrowverse villains. Which Arrowverse villain is your favorite? Let us know in the comments!