Oz is not the only strange land, nay,
they have neighbors, around. Gnomes have on multiple occasions
attempted to conquer their borders; Mimics would give their changing flesh
to partake in the blood of Oz's citizens, and Ozma, herself, wed a prince of
Ev.
Indeed, the people of the
surrounding lands would enjoy nothing more than Oz's assimilation into
their clutches.
Or its total
Annihilation.