Create an action-packed digital art masterpiece depicting a fierce battle between a valiant knight on a majestic steed and a colossal fire-breathing dragon. Render the knight in resplendent armor, wielding a glowing sword, and the dragon with intricate scales, razor-sharp claws, and a fiery breath illuminating the sky. Showcase the clash of wills and the epic struggle for survival, capturing the intensity and drama of the moment.