Does anyone know about the Frog King?

I had a very intense dream the other night, it was just a single image, looked a bit like a cyborg frog only the size of a small planet, floating in space. Huge spaceships were docking on its enhancements, it looked a bit like a Jean Giraud or Moebius painting. I woke up thinking "the frog king". Now I'm wondering whether I saw the painting somewhere or heard about the frog king, or just dreamt the whole thing up