Fan Casting Loki Laufeyson in MMU/6.: The Avengers (2012)

After his loss in the previous movie, Loki got to an unknown place where a strange alien had given him dark powers. He then returns to Earth with a magic scepter and tried to enslave its people. This act was a revenge on his brother and a part of a bigger plan too. He stole the Tesseract and with Dr. Pym under his control tried to bulid a portal to bring his armies to Earth. He manipulated the Avengers to fight with each other and killed Agent Coulson, but at the end he lost. After that Thor bringed him back to Asgard where he got imprisoned.