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Be nice to know what the original themes were lol (hint hint: respond them back to me). anyways WHAT I LIKE about this song is it starts out heavy to grab peoples attention, then ends in a somewhat softer atmosphere, kind alike a happy ending? I also like the double bass at 00:30 and onward :P
Overall - The song is amazing but...all I heard, or could tell the difference from, was 2 themes. But the music rocked so i'm giving you a 9/10