Awesome song you made here. While listening to it, I imagine the awakening of a great and ancient evil that was once defeated and sealed away in a cataclysmic battle that happened before mortals began recording history, only to prove that the victory was ultimately pyrrhic to the victors of that ancient battle, with the evil being free once again but stronger than ever. It's too late for the heroes to flee from it. All that they can do is to fight the great evil until it is sealed again or they die.