Surtr's Ultimate Form!
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The Flame Emperor kept spreading his enormous army of Infernal Black Flames Beasts across the landscape, as Drake's entire army of allies were fending them off with the best of their capabilities.
He had concentrated a large quantity of his time and strength to expand this army, as he still believed that overpowering Drake's army and kill a few of his beloved allies would break his will, and make him grow weaker, which would open an opportunity for him to slay the Dragon King.
Of course, it wasn't as if his gigantic body was merely a motionless monolith, his enormous blazing arms and his gigantic snake-like head glanced at Surtr and his group of friends, who were slightly separated from Drake's main frontline fighters.