"Yeah, ideally, we defeat him for good," Cassie says. "We should go for it if it doesn't jeopardize the escape of most of us here. But if we get away without defeating it for good we're still good to try again later, even if it is more prepared next time. If we don't get out at all, being stuck here for good is the best case scenario.

"We're on its turf, in a world that it made. If we come swinging for that thing, we'd best not miss."