Just rewatched the first episode of Adventure TIme that has the Lich. It was pretty intense and also showed a lot of ruins of cities and stuff. I can't tell with these kinds of shows if the post-apocalyptic theming has some kind of significant message or not.
Adventure Time Afficher plus
@Mirzaba I kind of dropped Adventure Time around that time but the Lich stuff was very real yeah, I'm not sure what the post-apocalyptic theming is about but I know they allude to it quite often and that the lore goes pretty far into it, since apparently a lot of things come from a nuclear war but most of the darker themes are in the background.