Fire opposes Water.. a basic setting so to seems... but why does this looks like it will go well with these two?? and that magic swordsman seems to be hiding something... well let's put this on the "plot" list for next time then.....
This is basically like Matrix. If the shadow universe repeats real-life events, how do we know that MC is just not in a different shadow universe where the end goal is to not get killed from the dragon's explosion?