Why not "Soul Refraction"? I know its still a little cliches (sounds like Soul Calibre) but I think it sounds ok.
The four crystals? I still don't get why ANY game has crystals in it. Just send the player to a wise or powerful sage who has "learned many secrets" or who "is the wisest person we know. If there is an answer, maybe he knows." (Its ok to be enigmatic, espicially at the start of the game.) Then spend the rest of the game trying to find the sage (who can either move around, die, be kidnapped, or simply send you to find his master or the head of his order who might be able to help you, or require ingredients or magical artifacts.)
What I really love about your idea, though, is how the player finds out that the "earth wind fire" idea may not be true and is given a rival idea to choose from. I usually hate the idea of elements but this one is interesting...