Magnus shakes his head. "Also," he explains, "If I can go back, then there's no point in even trying, because it means Surt could come here, take Jack, and go release Fenris Wolf and kill my dad and end the world anyway." He makes an apologetic face. "I know it sucks for a lot of people to be here... I miss a lot of stuff back home, too. People, and the Chase Space, and Fadlan's Falafels, and -- but I have to kind of hope that no one can ever leave. You know?"