A little bit about cultivators
The density of Qi grows exponentially with distance from the ground-level. Powerful cultivators thus often settle on tall mountains where the Qi is rich and dense; ordinary humans and beasts cannot survive at such altitudes. However, these powerful cultivators...
A little geography
If you ask an ordinary person on the street about the shape of the world, they can at best make an educated guess: maybe it is like a massive plate?
This would actually be quite correct. The world, is in fact, a flat disc, with a diameter twice that of the disc's thickness...
The Zorua option sounds really unlikely to hold up. Illusions are dispersed with a hit, and would never stand up to prolonged scrutiny. I'd find the deep cover options more believable if there was something like a Charmander; this being the feudal era, no one would have a pokedex and would thus...
[X] [January Wk 3] Figure out why you have convenient amnesia about the world around you.
[X] [January Wk 4] Ask Dr Sun how many people you need to stab in order to become a doctor.