BabaYaga Christmas Card design

I think that baba Yaga is how someone in the medieval times might explain an encounter with a mech pilot (Arthur C. Clarke once said that any sufficiently advanced technology is indistinguishable from magic) - in one version of the tale it is said that Yaga uses a human hand to enter her hut (this could explain a biometric scanner of sort). It's also said that she travels around in a flying pestle, which might be a vehicle with the anti-gravity propulsion (vimanas had those, and so did haunebus).