You will Watch Ben 10: Alien Force Season 3 Episode 37 online for free episodes with HQ / high quality. Stream cartoons Ben 10: Alien Force Episode 311 Trade-Off.Kevin and Darkstar (Michael Morningstar) set aside their differences to find an alien artifact called the Dominus Librium which can cure their respective conditions. It works, making them both powerless humans. Michael keeps the artifact. Gwen finds out about Kevin’s alliance with Michael and confronts Michael about it, only to discover that he planned for her to do so. Using the Dominus Librium, he steals her powers, then Ben’s when he and Kevin come looking for her. Kevin, despite being powerless, manages to grab the Dominus Librium, shattering it and returning both himself and Darkstar to their previous forms. Darkstar escapes, promising revenge.