One of my favorite scifi/fantasy series as a child was set in our world, but in which things like magic & Baba Yaga were real, historical entities. I forget how

One of my favorite scifi/fantasy series as a child was set in our world, but in which things like magic & Baba Yaga were real, historical entities. I forget how their eventual disappearance was justified, but I loved it as a kid. I think it was this series here: https://en.wikipedia.org/wiki/Alisa_Selezneva https://en.wikipedia.org/wiki/Alisa_Selezneva One of the stories was turned into a great piece of animation: https://en.wikipedia.org/wiki/The_Mystery_of_the_Third_Planet https://en.wikipedia.org/wiki/The_Mystery_of_the_Third_Plane... And apparently this movie is also set in the same continuity?: https://en.wikipedia.org/wiki/Guest_from_the_Future https://en.wikipedia.org/wiki/Guest_from_the_Future