This is an airship, housed by an organization known as the Collectors. You’ll learn more about them later. Also, as the title suggests, this comic is in the style of the comic XKCD by Randall Munroe. That comic, unlike this one, is less child-friendly.
Top Hat Guy: Are we ready?
Cory Doctorow: Yes, finally.
Top Hat Guy: Let’s get this show on the road, then. Poland! Get up! We’ve got a multiverse to save.