I have a vague recollection of a cartoon I saw sometime in the late 90s. As Scandinavia was a bit behind in releases back then I believe it was broadcasted in early 90s or late 80s in its original run. The animation style is similar to that of Spider-man the Animated Series from the early 90s and Highlander the Animated Series.
The premise of the show is similar to Highlander the Animated Series series, but with a more gritty tone. The world has been plunged into a radioactive wasteland after a nuclear war, I think, or some other catastrophe. A group of kids/young adults traverse wildlands looking for "sages" that has preserved the old world knowledge.
The one scene I remember vividly is when the group encounters one of the "sages", the one concerned with atomic/nuclear power. The sage removes his cowl to show a face scarred by radiation, this is never shown as his face is never seen but it is implied. After he has given his knowledge he sends the group away and activates some kind of self-destruct sequence, an atomic explosion follows.
The purpose of the group I cant remember but it was similar to that of Highlander, overthrowing a tyrant.
Does any of this sound familiar or have I gotten it mixed up with Highlander? It was 25 years ago so it is not unlikely.