Hello:

<<Mystical

Somthing involving a magic wand... or simply that which is not explained because of its endless tiny pieces which comprise it.

<<Mythical

A great/silly really OLD story!!!

In context I think most of the really subtle stuff, the hints, the whispers which any of the older Okinawan kata possess have a very real almost mystic aspect solely because there are obscene numbers of factors... which combined in particular ways enable producion of melodramatic virtually "mythic" results.

I certainly agree that wise word choices are extremely important... but I am also a fan of emoticons to add more richness to ones words!
J