It's probably the same guy, especially that near the end of that synopsis I read here, he is referred to as the Great Destroyer, not Fiery Destroyer. Assuming that's not from the posting member but the article.
My guess is that it's a dragon or winged creature. Again, I remind you all of the Watchtower Coast. All those forts along the three great lakes were built to protect from a dangerous and long forgotten foe to the north.