This is another Gamma World origin designed around a character archetype rather than a mutation. You can see the other origins in the series here.
The last archetype in my original list of 8 is the wanderer, which I originally summed up as someone who had “seen the world and learned more than most.” The origin is meant to capture the idea of a mysterious stranger that arrives in an isolated post-apocalyptic settlement. They are people who have learned a lot travelling the world and can use that knowledge as their greatest weapon.
You can download the Wanderer origin here.